WO2018221698A1 - Coシフトもしくは逆シフト触媒構造体及びその製造方法、coシフトまたは逆シフト反応装置、二酸化炭素と水素の製造方法、並びに一酸化炭素と水の製造方法 - Google Patents
Coシフトもしくは逆シフト触媒構造体及びその製造方法、coシフトまたは逆シフト反応装置、二酸化炭素と水素の製造方法、並びに一酸化炭素と水の製造方法 Download PDFInfo
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- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
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- B01J29/66—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively containing iron group metals, noble metals or copper
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- C01B3/02—Production of hydrogen; Production of gaseous mixtures containing hydrogen
- C01B3/06—Production of hydrogen; Production of gaseous mixtures containing hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen with inorganic reducing agents
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Definitions
- the present invention relates to a CO shift or reverse shift catalyst structure comprising a porous structure carrier and a CO shift or reverse shift catalyst and a method for producing the same, a CO shift or reverse shift reaction apparatus, a method for producing carbon dioxide and hydrogen, and one
- the present invention relates to a method for producing carbon oxide and water.
- Coal gasification combined power generation converts coal into flammable gas in a high-temperature and high-pressure gasification furnace, uses the converted product gas as fuel for power generation, and then releases it during conversion to flammable gas Power is generated by a steam turbine using waste heat.
- CO carbon monoxide
- CO 2 carbon dioxide
- C n H m hydrocarbons
- the CO shift catalyst examples include a Cu—Zn-based catalyst having a CO shift reaction activity in a low temperature region of 300 ° C. or lower and a Fe—Cr catalyst having a CO shift reaction activity in a high temperature region of 300 ° C. or higher. Furthermore, in the case of a CO shift catalyst having activity in a high temperature region, there is a concern about the precipitation of carbon, so it is necessary to add an excessive amount of water vapor to CO. On the other hand, since excessive addition of water vapor leads to a decrease in power generation efficiency, it is required to reduce the addition amount of water vapor while being excessive with respect to CO.
- an active component having either one of molybdenum (Mo) or iron (Fe) as a main component and one of nickel (Ni) or ruthenium (Ru) as a subcomponent, and the active component are supported.
- Titanium (Ti), zirconium (Zr), cerium (Ce), silica (Si), aluminum (Al), lanthanum (La), a composite oxide composed of at least two of them is used as a carrier and baked at a high temperature of 550 ° C or higher.
- a CO shift catalyst that is excellent in durability and can maintain a CO shift reaction stably for a long period of time even when the average pore diameter of the catalyst is increased and carbon deposition occurs.
- the product gas may contain H 2 S, and depending on the catalyst type, it is poisoned by the sulfur content, so a desulfurization operation is required in the previous stage. Therefore, a catalyst having at least Mo and Ni as a catalyst having activity of CO shift reaction even in the presence of H 2 S and using TiO 2 as a support as an oxide supporting these active components has been proposed ( Patent Document 2).
- this reverse shift reaction is desirably carried out at a high temperature of 600 ° C. or higher in view of the composition (equilibrium composition) of the synthesis gas produced by the reaction.
- the temperature of 600 ° C. or higher is usually much higher than the temperature at which the shift reaction is performed, it is difficult to use a catalyst for a normal shift reaction from the viewpoint of the sintering resistance of the catalyst metal. This is the actual situation (Patent Document 3).
- Ni-based catalysts such as Ni / Al 2 O 3 and NiO / ZnO has been reported as a reverse shift reaction catalyst (Non-patent Document 1).
- Ni-based catalysts have a problem in that methanation occurs, methane is generated, and the carbon monoxide concentration decreases. Therefore, it is desired to develop a reverse shift reaction catalyst that can suppress the production of methane as much as possible.
- An object of the present invention is to provide a CO shift or reverse shift catalyst structure capable of realizing a long life by suppressing a decrease in catalyst function, a method for producing the same, a CO shift or reverse shift reaction apparatus, and production of carbon dioxide and hydrogen. It is to provide a method and a method for producing carbon monoxide and water.
- the present inventors have found that a porous support composed of a zeolite-type compound, at least one CO shift or reverse shift catalyst substance inherent in the support, and And the carrier has a passage communicating with each other, and the CO shift or reverse shift catalytic material is present in at least the passage of the carrier, whereby the catalytic activity of the CO shift or reverse shift catalytic material is It has been found that a CO shift or reverse shift catalyst structure capable of suppressing the decrease and realizing a long life can be obtained, and the present invention has been completed based on such knowledge.
- the gist configuration of the present invention is as follows.
- a porous support composed of a zeolite-type compound; At least one CO shift or reverse shift catalytic material inherent in the support;
- the carrier has passages communicating with each other;
- the passage includes any one of a one-dimensional hole, a two-dimensional hole, and a three-dimensional hole defined by a skeleton structure of the zeolite-type compound, and the one-dimensional hole, the two-dimensional hole, and the three-dimensional hole.
- Reverse shift catalyst structure [4] The CO shift or reverse shift catalyst structure according to [2] or [3], wherein the CO shift or reverse shift catalyst material is metal fine particles.
- the metal fine particles according to [4], wherein the metal fine particles are fine particles composed of at least one metal or metal oxide selected from the group consisting of cobalt, nickel, iron, and copper. CO shift or reverse shift catalyst structure.
- the average particle diameter of the metal fine particles is larger than the average inner diameter of the passage and is equal to or smaller than the inner diameter of the expanded portion, [4] to [6] CO shift or reverse shift catalyst structure.
- the metal element (M) of the metal fine particles is contained in an amount of 0.5 to 2.5% by mass with respect to the CO shift or reverse shift catalyst structure, [4] to [7] The CO shift or reverse shift catalyst structure according to any one of [7].
- the content of the at least one CO shift or reverse shift catalyst substance inherent in the carrier is greater than the content of the at least one other CO shift or reverse shift catalyst substance held on the outer surface of the carrier.
- CO shift or reverse shift catalyst structure according to [15] characterized in that [17] The CO shift or reverse shift catalyst structure according to any one of [1] to [16], wherein the zeolite type compound is a silicate compound.
- a process for producing a CO shift or reverse shift catalyst structure comprising: [20] The CO shift according to [19], wherein a nonionic surfactant is added in an amount of 50 to 500% by mass with respect to the precursor material (A) before the firing step.
- a method for producing a reverse shift catalyst structure comprising: [20] The CO shift according to [19], wherein a nonionic surfactant is added in an amount of 50 to 500% by mass with respect to the precursor material (A) before the firing step.
- the precursor material (A) is impregnated with the metal-containing solution by adding the metal-containing solution to the precursor material (A) in a plurality of times.
- the amount of the metal-containing solution added to the precursor material (A) is changed to the precursor material.
- a method for producing carbon dioxide and hydrogen that uses a catalyst to produce carbon dioxide and hydrogen from carbon monoxide and water, the catalyst comprising: A porous structure carrier composed of a zeolite-type compound; And at least one metal fine particle inherent in the carrier, The carrier has passages communicating with each other; The method for producing carbon dioxide and hydrogen, wherein the metal fine particles include a CO shift catalyst structure existing in at least a diameter-enlarged portion of the passage of the carrier.
- Production of carbon dioxide and hydrogen characterized in that carbon dioxide and hydrogen are produced from carbon monoxide and water using the CO shift catalyst structure according to any one of [1] to [17] Method.
- a method for producing carbon dioxide and hydrogen wherein carbon monoxide and water are converted into carbon dioxide and hydrogen using the CO shift reaction apparatus according to [18].
- a method for producing carbon monoxide and water using a catalyst to produce carbon monoxide and water from carbon dioxide and hydrogen wherein the catalyst comprises: A porous structure carrier composed of a zeolite-type compound; And at least one metal fine particle inherent in the carrier, The carrier has passages communicating with each other; The method for producing carbon monoxide and water, wherein the metal fine particles include a reverse shift catalyst structure that exists in at least a diameter-enlarged portion of the passage of the carrier.
- Carbon monoxide and water characterized by producing carbon monoxide and water from carbon dioxide and hydrogen using the reverse shift catalyst structure according to any one of [1] to [17] Production method.
- the CO shift or reverse shift catalyst structure which can suppress the fall of a catalyst function, and can implement
- a method and a method for producing carbon monoxide and water can be provided.
- the reverse shift catalyst structure since such a CO shift catalyst structure and reverse shift catalyst structure exhibit high catalytic activity and good heat resistance, the reverse shift catalyst structure is particularly useful for use in reverse shift reactions. is there.
- FIG. 1 schematically shows the internal structure of a CO shift or reverse shift catalyst structure according to an embodiment of the present invention
- FIG. 1 (a) is a perspective view (partially in cross section).
- 1 (b) is a partially enlarged sectional view.
- 2 is a partially enlarged cross-sectional view for explaining an example of the function of the CO shift or reverse shift catalyst structure of FIG. 1
- FIG. 2 (a) is a sieving function
- FIG. 3 is a flowchart showing an example of a method for producing the CO shift or reverse shift catalyst structure of FIG.
- FIG. 4 is a schematic diagram showing a modification of the CO shift or reverse shift catalyst structure of FIG.
- FIG. 1 is a diagram schematically showing a configuration of a CO shift or reverse shift catalyst structure according to an embodiment of the present invention, in which (a) is a perspective view (a part is shown in cross section), (b).
- FIG. 1 Note that the CO shift or reverse shift catalyst structure in FIG. 1 is an example, and the shape, dimensions, and the like of each component according to the present invention are not limited to those in FIG.
- a CO shift or reverse shift catalyst structure 1 includes a porous structure carrier 10 composed of a zeolite-type compound, and at least one CO shift or Reverse shift catalyst material 20.
- CO shift or reverse shift catalyst material 20 may be any material having a CO shift catalytic ability (CO shift or reverse shift catalytic activity), and preferably metal fine particles. Details of the metal fine particles will be described later.
- the carrier 10 has a porous structure and, as shown in FIG. 1 (b), preferably has a plurality of holes 11a, 11a,.
- the CO shift or reverse shift catalyst material 20 is present in at least the passage 11 of the carrier 10, and is preferably held in at least the passage 11 of the carrier 10.
- the movement of the CO shift or reverse shift catalyst material 20 in the carrier 10 is regulated, and the aggregation of the CO shift or reverse shift catalyst material 20, 20 is effectively prevented.
- the reduction of the effective surface area of the CO shift or reverse shift catalyst material 20 can be effectively suppressed, and the CO shift or reverse shift catalytic activity of the CO shift or reverse shift catalyst material 20 is maintained for a long period of time. That is, according to the CO shift or reverse shift catalyst structure 1, a decrease in CO shift or reverse shift catalyst activity due to aggregation of the CO shift or reverse shift catalyst material 20 can be suppressed. Long life can be achieved.
- the replacement frequency of the CO shift or reverse shift catalyst structure 1 can be reduced, and the amount of used CO shift or reverse shift catalyst structure 1 is greatly reduced. Can be reduced to save resources.
- the CO shift or reverse shift catalyst structure 1 when the CO shift or reverse shift catalyst structure 1 is in the fluid, the fluid flows into the passage 11 from the hole 11a of the carrier 10, and therefore the speed of the fluid flowing in the passage 11 depends on the flow resistance ( The frictional force) is considered to be slower than the speed of the fluid flowing on the outer surface of the carrier 10. Due to the influence of the flow path resistance, the pressure that the CO shift or reverse shift catalytic material 20 existing in the passage 11 receives from the fluid is the pressure that the CO shift or reverse shift catalytic material 20 receives from the fluid outside the carrier 10. Compared to lower.
- the flow path resistance as described above is considered to increase as the passage 11 of the carrier 10 has a plurality of bends and branches and the inside of the carrier 10 has a more complicated and three-dimensional structure. .
- the passage 11 includes any one of a one-dimensional hole, a two-dimensional hole, and a three-dimensional hole defined by a skeleton structure of the zeolite type compound, and the one-dimensional hole, the two-dimensional hole, and the three-dimensional hole. It is preferable to have a different diameter-expanded portion 12 from each other.
- the CO shift or reverse shift catalytic material 20 is preferably present at least in the diameter-expanded portion 12, and at least in the diameter-expanded portion 12. More preferably, it is included.
- the enlarged diameter part 12 is connecting the some hole 11a and 11a which comprise either of the said one-dimensional hole, the said two-dimensional hole, and the said three-dimensional hole.
- the one-dimensional hole referred to here is a tunnel-type or cage-type hole forming a one-dimensional channel, or a plurality of tunnel-type or cage-type holes forming a plurality of one-dimensional channels (a plurality of holes).
- a two-dimensional hole refers to a two-dimensional channel in which a plurality of one-dimensional channels are two-dimensionally connected.
- a three-dimensional hole refers to a three-dimensional channel in which a plurality of one-dimensional channels are three-dimensionally connected. Point to.
- Inclusion refers to a state in which the CO shift or reverse shift catalyst material 20 is included in the carrier 10. At this time, the CO shift or reverse shift catalyst material 20 and the carrier 10 do not necessarily need to be in direct contact with each other, and other substances (for example, between the CO shift or reverse shift catalyst material 20 and the carrier 10 (for example, , A surfactant, etc.) may be interposed between the CO shift or reverse shift catalyst substance 20 indirectly on the carrier 10.
- FIG. 1B shows a case where the CO shift or reverse shift catalyst material 20 is enclosed by the enlarged diameter portion 12, but the present invention is not limited to this configuration.
- a part of it may be held in the passage 11 in a state of protruding from the outside of the enlarged diameter portion 12.
- the CO shift or reverse shift catalyst material 20 may be partially embedded in a portion of the passage 11 other than the enlarged diameter portion 12 (for example, an inner wall portion of the passage 11), or may be held by fixing or the like.
- the passage 11 is formed in a three-dimensional manner inside the carrier 10 including a branch portion or a merge portion, and the enlarged diameter portion 12 is preferably provided in the branch portion or the merge portion of the passage 11. .
- the average inner diameter DF of the passage 11 formed in the carrier 10 is calculated from the average value of the short diameter and the long diameter of the hole 11a constituting any one of the one-dimensional hole, the two-dimensional hole, and the three-dimensional hole.
- the thickness is 0.1 to 1.5 nm, preferably 0.5 to 0.8 nm.
- the inner diameter DE of the enlarged diameter portion 12 is, for example, 0.5 to 50 nm, preferably 1.1 to 40 nm, and more preferably 1.1 to 3.3 nm.
- the inner diameter D E of the enlarged diameter portion 12 depends on, for example, the pore diameter of the precursor material (A) described later, and the average particle diameter D C of the CO shift or reverse shift catalyst substance 20 to be included.
- the inner diameter DE of the enlarged diameter portion 12 is a size that can enclose the CO shift or reverse shift catalyst material 20.
- the carrier 10 is composed of a zeolite type compound.
- Zeolite type compounds include, for example, zeolites (aluminosilicates), cation exchange zeolites, silicate compounds such as silicalite, zeolite related compounds such as aluminoborate, aluminoarsenate, germanate, molybdenum phosphate, etc. And phosphate-based zeolite-like substances.
- the zeolite type compound is preferably a silicate compound.
- the framework structure of zeolite type compounds is FAU type (Y type or X type), MTW type, MFI type (ZSM-5), FER type (ferrierite), LTA type (A type), MWW type (MCM-22) , MOR type (mordenite), LTL type (L type), BEA type (beta type), etc., preferably MFI type, more preferably ZSM-5.
- a plurality of pores having a pore size corresponding to each skeleton structure are formed.
- the maximum pore size of the MFI type is 0.636 nm (6.36 mm), and the average pore size is 0.560 nm (5.60 mm). is there.
- the average particle diameter D C of the fine metal particles 20 have an average internal diameter D F of the preferred path 11 Larger than the inner diameter D E of the enlarged diameter portion 12 (D F ⁇ D C ⁇ D E ).
- Such metal fine particles 20 are preferably present in the enlarged diameter portion 12 in the passage 11, and movement of the metal fine particles 20 in the carrier 10 is restricted. Therefore, for example, even when the metal fine particles 20 are subjected to an external force from a CO-containing mixed gas containing CO and water vapor (H 2 O) as fluids, the movement of the metal fine particles 20 in the carrier 10 is suppressed, It is possible to effectively prevent the metal fine particles 20, 20,... Existing in the enlarged diameter portions 12, 12,.
- the ratio of the average particle diameter D C of the fine metal particles 20 to the average inner diameter D F of the passage 11 (D C / D F) is preferably 0.05 to 300, more preferably be 0.1 to 30 More preferably, it is 1.1 to 30, and particularly preferably 1.4 to 3.6.
- the metal element (M) of the metal fine particles 20 is preferably contained in an amount of 0.5 to 2.5% by mass with respect to the CO shift or reverse shift catalyst structure 1, and the CO shift or reverse shift catalyst structure. More preferably, the content is 0.5 to 1.5% by mass with respect to the body 1.
- the metal element (M) is Co
- the content (mass%) of the Co element is ⁇ (mass of Co element) / (mass of all elements of the CO shift or reverse shift catalyst structure 1) ⁇ ⁇ 100.
- the metal fine particles may be fine particles composed of at least one metal or metal oxide.
- the metal fine particles may be composed of a single metal or metal oxide, or two or more metals or metals. It may be composed of a mixture of oxides.
- “metal” (as a material) constituting the metal fine particles includes a single metal containing one kind of metal element (M), a metal alloy containing two or more kinds of metal elements (M), and Is a generic term for metals containing one or more metal elements.
- the “metal oxide” means an oxide containing one kind of metal element (M) and a composite oxide containing two or more kinds of metal elements (M), and one or more kinds of metal elements. A generic term for oxides containing (M).
- metals examples include platinum (Pt), palladium (Pd), ruthenium (Ru), nickel (Ni), cobalt (Co), molybdenum (Mo), tungsten (W), iron (Fe), chromium ( Cr), cerium (Ce), copper (Cu), magnesium (Mg), aluminum (Al), and the like, and any one or more of the above-mentioned components are preferable.
- metal oxides examples include cobalt oxide (CoO x ), nickel oxide (NiO x ), iron oxide (FeO x ), copper oxide (CuO x ), zirconium oxide (ZrO x ), cerium oxide ( CeO x ), aluminum oxide (AlO x ), niobium oxide (NbO x ), titanium oxide (TiO x ), bismuth oxide (BiO x ), molybdenum oxide (MoO x ), vanadium oxide (VO x ), chromium oxide (CrO) x ) and the like, and any one or more of the above-mentioned components are preferably used as the main component.
- the metal fine particles are fine particles composed of at least one metal or metal oxide selected from the group consisting of cobalt, nickel, iron and copper. It is more preferable that the fine particles are composed of at least one metal or metal oxide selected from the group consisting of cobalt, iron and copper, and the fine particles are composed of copper or copper oxide. Particularly preferred.
- the ratio of the silicon (Si) constituting the carrier 10 to the metal element (M) constituting the metal fine particles 20 is preferably 10 to 1000, and preferably 50 to 200. Is more preferable. If the ratio is greater than 1000, the CO shift or reverse shift catalytic activity may be reduced, and the action as a CO shift or reverse shift catalytic substance may not be sufficiently obtained. On the other hand, if the ratio is less than 10, the ratio of the metal fine particles 20 becomes too large, and the strength of the carrier 10 tends to decrease.
- the metal fine particles 20 referred to here are fine particles held or supported inside the carrier 10 and do not include metal fine particles attached to the outer surface of the carrier 10.
- the CO shift or reverse shift catalyst structure 1 includes the porous support 10 and at least one CO shift or reverse shift catalyst material 20 inherent in the support 10.
- the CO shift catalyst structure 1 exhibits the CO shift catalytic ability of the CO shift catalyst material 20 when the CO shift catalyst material 20 existing in the carrier 10 comes into contact with the CO-containing mixed gas.
- the CO-containing mixed gas that has contacted the outer surface 10a of the CO shift catalyst structure 1 flows into the carrier 10 from the holes 11a formed in the outer surface 10a, is guided into the passage 11, and is passed through the passage 11. It moves through and goes out of the CO shift catalyst structure 1 through the other hole 11a.
- the CO shift catalytic reaction of the CO shift catalytic material 20 occurs by contacting the CO shift catalytic material 20 held in the passage 11.
- the reverse shift catalyst structure 1 is configured so that the reverse shift catalyst material 20 inherent in the carrier 10 is brought into contact with the CO 2 -containing mixed gas containing CO 2 and H 2 , thereby causing the reverse shift catalyst material 20 to perform the reverse shift catalyst. Demonstrate the ability. Specifically, the CO 2 -containing mixed gas that has contacted the outer surface 10 a of the reverse shift catalyst structure 1 flows into the carrier 10 from the holes 11 a formed in the outer surface 10 a and is guided into the passage 11. It moves through the inside and goes out of the reverse shift catalyst structure 1 through the other hole 11a. In the path through which the CO 2 -containing mixed gas moves through the passage 11, the reverse shift catalytic reaction of the reverse shift catalytic material 20 occurs by contacting the reverse shift catalytic material 20 held in the passage 11.
- the CO shift or reverse shift catalyst structure 1 has molecular sieving ability because the support 10 has a porous structure.
- the molecular sieving ability of the CO shift or reverse shift catalyst structure 1 that permeates H 2 , H 2 O, CO, and CO 2 contained in the synthesis gas that is a fluid will be described.
- other molecules 15 having a size exceeding the pore diameter of the pores 11 a cannot flow into the carrier 10.
- the reaction of the compound that cannot flow into the carrier 10 is regulated and may flow into the carrier 10. Possible compounds can be reacted.
- the CO shift or reverse shift catalyst material 20 is included in the enlarged diameter portion 12 of the passage 11.
- CO shift or reverse shift catalyst material 20 is a metal fine particle
- the average particle diameter D C of the fine metal particles is greater than the average internal diameter D F of the passage 11 is smaller than the inner diameter D E of the enlarged diameter portion 12 (D F ⁇ D C ⁇ D E )
- a small passage 13 is formed between the metal fine particles and the enlarged diameter portion 12. Therefore, as shown by the arrow in FIG. 2B, the CO-containing mixed gas or the CO 2 -containing mixed gas flowing into the small passage 13 comes into contact with the metal fine particles.
- each metal fine particle is enclosed by the enlarged diameter part 12, the movement in the support
- CO shift or reverse shift reactor Further, a CO shift or reverse shift reaction apparatus having a CO shift or reverse shift catalyst structure may be formed using the CO shift or reverse shift catalyst structure 1.
- CO shift or reverse shift catalyst structure 1 By using the CO shift or reverse shift catalyst structure 1 according to the above embodiment, it is possible to obtain a CO shift or reverse shift reaction device having the same effects as described above.
- FIG. 3 is a flowchart showing a method for manufacturing the CO shift or reverse shift catalyst structure 1 of FIG.
- a method for producing a CO shift or reverse shift catalyst structure will be described, taking as an example the case where the CO shift or reverse shift catalyst substance inherent in the carrier is metal fine particles.
- Step S1 Preparation process
- a precursor material (A) for obtaining a porous support composed of a zeolite-type compound is prepared.
- the precursor material (A) is preferably a regular mesoporous material, and can be appropriately selected according to the type (composition) of the zeolite-type compound constituting the carrier of the CO shift or reverse shift catalyst structure.
- the regular mesoporous material has a one-dimensional pore having a pore diameter of 1 to 50 nm, A compound composed of a Si—O skeleton having a uniform size and regularly developed in two or three dimensions is preferable.
- Such regular mesoporous materials can be obtained as various composites depending on the synthesis conditions. Specific examples of the composites include, for example, SBA-1, SBA-15, SBA-16, KIT-6, FSM- 16, MCM-41, etc., among which MCM-41 is preferable.
- the pore diameter of SBA-1 is 10 to 30 nm
- the pore diameter of SBA-15 is 6 to 10 nm
- the pore diameter of SBA-16 is 6 nm
- the pore diameter of KIT-6 is 9 nm
- the pore diameter of FSM-16 is 3
- the pore diameter of MCM-41 is 1 to 10 nm.
- regular mesoporous materials include mesoporous silica, mesoporous aluminosilicate, and mesoporous metallosilicate.
- the precursor material (A) may be a commercially available product or a synthetic product.
- the precursor material (A) can be performed by a known method for synthesizing regular mesoporous materials. For example, a mixed solution containing a raw material containing the constituent elements of the precursor material (A) and a templating agent for defining the structure of the precursor material (A) is prepared, and the pH is adjusted as necessary. Hydrothermal treatment (hydrothermal synthesis) is performed. Thereafter, the precipitate (product) obtained by hydrothermal treatment is recovered (for example, filtered), washed and dried as necessary, and further calcined to form a regular mesoporous material in powder form. A precursor material (A) is obtained.
- a solvent of the mixed solution for example, water, an organic solvent such as alcohol, or a mixed solvent thereof can be used.
- a raw material is selected according to the kind of support
- carrier for example, silica agents, such as tetraethoxysilane (TEOS), fumed silica, quartz sand, etc. are mentioned.
- TEOS tetraethoxysilane
- templating agent various surfactants, block copolymers and the like can be used, and it is preferable to select according to the kind of the compound of the regular mesoporous material.
- a surfactant such as hexadecyltrimethylammonium bromide is preferred.
- Hydrothermal treatment can be performed, for example, in a sealed container at 80 to 800 ° C., 5 to 240 hours, and 0 to 2000 kPa.
- the firing treatment can be performed, for example, in air at 350 to 850 ° C. for 2 to 30 hours.
- Step S2 impregnation step
- the prepared precursor material (A) is impregnated with the metal-containing solution to obtain the precursor material (B).
- the metal-containing solution may be a solution containing a metal component (for example, metal ion) corresponding to the metal element (M) constituting the metal fine particles of the CO shift or reverse shift catalyst structure. It can be prepared by dissolving a metal salt containing the element (M). Examples of such metal salts include metal salts such as chlorides, hydroxides, oxides, sulfates, nitrates, etc. Among them, nitrates are preferable.
- the solvent for example, water, an organic solvent such as alcohol, or a mixed solvent thereof can be used.
- the method of impregnating the precursor material (A) with the metal-containing solution is not particularly limited.
- the precursor material (A) is stirred while stirring the powdery precursor material (A) before the firing step described later. It is preferable to add the metal-containing solution in small portions in multiple portions. Further, from the viewpoint of facilitating the penetration of the metal-containing solution into the pores of the precursor material (A), a surfactant as an additive is added in advance to the precursor material (A) before adding the metal-containing solution. It is preferable to add it.
- Such an additive has a function of coating the outer surface of the precursor material (A), suppresses the metal-containing solution added thereafter from adhering to the outer surface of the precursor material (A), and the metal It is considered that the contained solution is more likely to enter the pores of the precursor material (A).
- nonionic surfactants such as polyoxyethylene oleyl ether, polyoxyethylene alkyl ether, and polyoxyethylene alkylphenyl ether. Since these surfactants have a large molecular size and cannot penetrate into the pores of the precursor material (A), they do not adhere to the inside of the pores, and the metal-containing solution penetrates into the pores. It is thought not to interfere.
- the nonionic surfactant is preferably added in an amount of 50 to 500% by mass with respect to the precursor material (A) before the firing step described later.
- the addition amount of the nonionic surfactant to the precursor material (A) is less than 50% by mass, the above-described inhibitory action is hardly exhibited, and the nonionic surfactant is added to the precursor material (A) at 500. Addition of more than% by mass is not preferable because the viscosity increases excessively. Therefore, the addition amount of the nonionic surfactant with respect to the precursor material (A) is set to a value within the above range.
- the amount of the metal-containing solution added to the precursor material (A) is the amount of the metal element (M) contained in the metal-containing solution impregnated in the precursor material (A) (that is, the precursor material (B It is preferable to adjust appropriately in consideration of the amount of the metal element (M) contained in ().
- the addition amount of the metal-containing solution added to the precursor material (A) is the metal element (M) contained in the metal-containing solution added to the precursor material (A)
- the ratio of silicon (Si) constituting the precursor material (A) atomic ratio Si / M
- it is preferably adjusted to be 10 to 1000, and adjusted to be 50 to 200. It is more preferable.
- the addition of the metal-containing solution to be added to the precursor material (A) By converting the amount to 50 to 200 in terms of the atomic ratio Si / M, the metal element (M) of the metal fine particles is 0.5 to 2.5 mass with respect to the CO shift or reverse shift catalyst structure. % Can be contained.
- the amount of the metal element (M) present in the pores is the same as the metal concentration of the metal-containing solution, the presence or absence of the additive, and other conditions such as temperature and pressure. If there is, it is roughly proportional to the amount of the metal-containing solution added to the precursor material (A).
- the amount of the metal element (M) inherent in the precursor material (B) is proportional to the amount of the metal element constituting the metal fine particles inherent in the support of the CO shift or reverse shift catalyst structure.
- the metal-containing solution can be sufficiently impregnated inside the pores of the precursor material (A), and thus It is possible to adjust the amount of fine metal particles incorporated in the carrier of the CO shift or reverse shift catalyst structure.
- a cleaning treatment may be performed as necessary.
- the cleaning solution water, an organic solvent such as alcohol, or a mixed solution thereof can be used.
- the drying treatment include natural drying overnight or high temperature drying at 150 ° C. or lower.
- the regular mesopores of the precursor material (A) are obtained by performing the baking treatment described later in a state where a large amount of moisture contained in the metal-containing solution and the moisture of the cleaning solution remain in the precursor material (A). Since the skeletal structure as a substance may be broken, it is preferable to dry it sufficiently.
- Step S3 Firing step
- the precursor material (B) obtained by impregnating the precursor material (A) for impregnating the porous material structure composed of the zeolite type compound with the metal-containing solution is calcined to obtain the precursor material (C). Get.
- the calcination treatment is preferably performed, for example, in air at 350 to 850 ° C. for 2 to 30 hours.
- a baking treatment the metal component impregnated in the pores of the regular mesoporous material grows and crystal particles are formed in the pores.
- Step S4 Hydrothermal treatment process
- a mixed solution in which the precursor material (C) and the structure-directing agent are mixed is prepared, and the precursor material (C) obtained by firing the precursor material (B) is hydrothermally treated to produce a CO shift.
- a reverse shift catalyst structure is obtained.
- the structure directing agent is a templating agent for defining the skeletal structure of the carrier of the CO shift or reverse shift catalyst structure.
- a surfactant can be used.
- the structure directing agent is preferably selected according to the skeleton structure of the carrier of the CO shift or reverse shift catalyst structure. For example, tetramethylammonium bromide (TMABr), tetraethylammonium bromide (TEABr), tetrapropylammonium bromide (TPABr) And the like are preferable.
- the mixing of the precursor material (C) and the structure directing agent may be performed during the hydrothermal treatment step or before the hydrothermal treatment step.
- the preparation method of the said mixed solution is not specifically limited, A precursor material (C), a structure directing agent, and a solvent may be mixed simultaneously, or precursor material (C) and structure prescription
- each agent is dispersed in each solution, each dispersion solution may be mixed.
- the solvent for example, water, an organic solvent such as alcohol, or a mixed solvent thereof can be used.
- the pH of the mixed solution is preferably adjusted using an acid or a base before hydrothermal treatment.
- the hydrothermal treatment can be performed by a known method, for example, preferably in a sealed container at 80 to 800 ° C., 5 hours to 240 hours, and 0 to 2000 kPa.
- the hydrothermal treatment is preferably performed in a basic atmosphere.
- the reaction mechanism here is not necessarily clear, by performing hydrothermal treatment using the precursor material (C) as a raw material, the skeleton structure of the precursor material (C) as a regular mesoporous material gradually collapses. While maintaining the position of the metal fine particles inside the pores of the precursor material (C), a new skeletal structure (porous structure) as a support for the CO shift or reverse shift catalyst structure is obtained by the action of the structure directing agent. ) Is formed.
- the CO shift or reverse shift catalyst structure thus obtained comprises a porous structure carrier and metal fine particles present in the carrier, and the carrier has a passage in which a plurality of pores communicate with each other due to the porous structure. And at least a part of the metal fine particles are present in the passage of the carrier.
- a mixed solution in which the precursor material (C) and the structure directing agent are mixed is prepared, and the precursor material (C) is hydrothermally treated.
- the precursor material (C) may be hydrothermally treated without mixing the precursor material (C) and the structure directing agent.
- the precipitate (CO shift or reverse shift catalyst structure) obtained after the hydrothermal treatment is washed, dried and calcined as necessary after collection (for example, filtration).
- the cleaning solution water, an organic solvent such as alcohol, or a mixed solution thereof can be used.
- the drying treatment include natural drying overnight or high temperature drying at 150 ° C. or lower.
- the skeletal structure as a carrier of the CO shift or reverse shift catalyst structure may be broken.
- the firing treatment can be performed, for example, in air at 350 to 850 ° C. for 2 to 30 hours.
- the structure directing agent attached to the CO shift or reverse shift catalyst structure is burned out.
- the CO shift or reverse shift catalyst structure can be used as it is without firing the recovered precipitate, depending on the purpose of use.
- the environment in which the CO shift or reverse shift catalyst structure is used is a high temperature environment in an oxidizing atmosphere
- the structure directing agent is burned out by being exposed to the use environment for a certain period of time.
- a CO shift or reverse shift catalyst structure can be obtained and used as it is.
- the manufacturing method described above is an example in the case where the metal element (M) contained in the metal-containing solution impregnated in the precursor material (A) is a metal species that is not easily oxidized (for example, a noble metal).
- the metal element (M) contained in the metal-containing solution impregnated in the precursor material (A) is a metal species that is easily oxidized (eg, Fe, Co, Cu, etc.)
- the metal component is oxidized by the heat treatment in the steps (steps S3 to S4) after the impregnation treatment (step S2). . Therefore, the metal oxide fine particles are inherent in the support formed in the hydrothermal treatment step (step S4).
- step S5 reduction process
- the metal oxide fine particles present in the carrier are reduced, and metal fine particles corresponding to the metal element (M) constituting the metal oxide fine particles are formed.
- M metal element
- the environment in which the CO shift or reverse shift catalyst structure is used is a reducing atmosphere
- the environment in which the CO shift or reverse shift catalyst structure is used is a reducing atmosphere
- the metal oxide fine particles are reduced, so that the same CO shift or reverse shift catalyst structure as in the case of the reduction treatment can be obtained, so that the oxide fine particles can be used as they are in the carrier.
- FIG. 4 is a schematic diagram showing a modification of the CO shift or reverse shift catalyst structure 1 of FIG. 1 shows a case where the CO shift or reverse shift catalyst structure 1 includes a carrier 10 and a CO shift or reverse shift catalyst material 20 inherent in the carrier 10, but is not limited to this configuration.
- the CO shift or reverse shift catalyst structure 2 may further include another CO shift or reverse shift catalyst material 30 held on the outer surface 10 a of the carrier 10.
- the other CO shift or reverse shift catalyst material 30 is a material that exhibits one or more catalytic capabilities.
- the catalytic ability of the other CO shift or reverse shift catalyst material 30 may be the same as or different from the catalytic ability of the CO shift or reverse shift catalyst material 20.
- the other CO shift or reverse shift catalyst substance 30 material is the material of the CO shift or reverse shift catalyst substance 20. May be the same or different. According to this configuration, the content of the CO shift or reverse shift catalyst material held in the CO shift or reverse shift catalyst structure 2 can be increased, and the catalytic activity of the CO shift or reverse shift catalyst material is further promoted. be able to.
- the content of the CO shift or reverse shift catalyst material 20 inherent in the carrier 10 is preferably larger than the content of the other CO shift or reverse shift catalyst material 30 held on the outer surface 10 a of the carrier 10. .
- the catalytic ability of the CO shift or reverse shift catalyst substance 20 held inside the carrier 10 becomes dominant, and the catalytic ability of the CO shift or reverse shift catalyst substance is stably exhibited.
- a catalyst includes a porous structure carrier 10 composed of a zeolite-type compound and at least one metal fine particle 20 contained in the carrier 10, and the carrier 10 has a passage 11 communicating with each other,
- the metal fine particles 20 include the CO shift catalyst structure 1 existing in at least the diameter-enlarged portion 12 of the passage 11 of the carrier 10. That is, the present invention provides a method for producing carbon dioxide and hydrogen, which produces carbon dioxide and hydrogen from carbon monoxide and water (steam) using the above-described CO shift catalyst structure.
- the raw material for carrying out the carbon dioxide and hydrogen production method using such a CO shift reaction is not particularly limited as long as it is a synthesis gas mainly composed of gaseous water and carbon monoxide.
- a synthesis gas having a molar ratio of carbon monoxide in the raw material gas of 1 to 100 is preferable.
- the reaction conditions in the CO shift reaction can be set according to the concentration of the gas component in the raw material gas, the content of the catalyst component, and the like.
- the reaction temperature in the CO shift reaction is preferably 150 to 300 ° C.
- the reaction pressure is preferably 1 to 100 atm (absolute pressure)
- the space velocity of the raw material gas (excluding water vapor) is preferably 1000 to 100,000 (1 / h).
- the CO shift reaction can be carried out in a process known as a reaction process for the CO shift reaction, for example, a fixed bed, a supercritical fixed bed, a slurry bed, a fluidized bed or the like.
- a reaction process for the CO shift reaction for example, a fixed bed, a supercritical fixed bed, a slurry bed, a fluidized bed or the like.
- a method for producing carbon dioxide and hydrogen may be provided in which carbon monoxide and water are converted into carbon dioxide and hydrogen using the above-described CO shift reaction apparatus.
- a CO shift reaction apparatus is not particularly limited as long as it can perform a CO shift reaction using the above-mentioned CO shift catalyst structure.
- a normal use such as a reactor, a reaction tube, a reaction column, etc. Can be used.
- a CO shift reaction apparatus having a CO shift catalyst structure the same effects as those exhibited by the CO shift catalyst structure can be obtained.
- the present invention also provides a method for producing carbon monoxide and water, which uses a catalyst to produce carbon monoxide and water (water vapor) from carbon dioxide and hydrogen.
- a catalyst includes a porous structure carrier 10 composed of a zeolite-type compound and at least one metal fine particle 20 contained in the carrier 10, and the carrier 10 has a passage 11 communicating with each other,
- the metal fine particles 20 include the reverse shift catalyst structure 1 existing in at least the diameter-enlarged portion 12 of the passage 11 of the carrier 10. That is, the present invention provides a method for producing carbon monoxide and water, which generates carbon monoxide and water (water vapor) from carbon dioxide and hydrogen using the above-described reverse shift catalyst structure.
- the raw material for carrying out the method for producing carbon monoxide and water using such a reverse shift reaction is not particularly limited as long as it is a synthesis gas mainly composed of molecular hydrogen and carbon dioxide.
- the composition of CO 2 , H 2 , CO, and H 2 O is governed by chemical equilibrium, and the composition of the resulting gas is the reaction It depends on the temperature and the CO 2 / H 2 ratio of the source gas.
- the unreacted CO 2 and the generated H 2 O are removed from the gas after the reaction to increase the H 2 ratio of the synthesis gas obtained as the ratio of the source gas H 2 increases. Can do.
- the reverse shift reaction can be carried out effectively at a reaction temperature of 300 ° C. or more and 900 ° C. or less, preferably a reaction temperature of 400 ° C. or more and 850 ° C. or less, more preferably 500 ° C. or more and 800 ° C. or less.
- a reaction temperature of 300 ° C. or more and 900 ° C. or less, preferably a reaction temperature of 400 ° C. or more and 850 ° C. or less, more preferably 500 ° C. or more and 800 ° C. or less.
- the reaction temperature is less than 300 ° C., carbon dioxide gas tends not to be sufficiently converted to carbon monoxide for equilibrium.
- the reaction temperature exceeds 900 ° C., it is necessary to improve the performance of incidental facilities such as piping, which is not preferable from the viewpoint of manufacturing cost.
- the reverse shift reaction can also be carried out in a process known as a reaction process of the reverse shift reaction, for example, a fixed bed, a supercritical fixed bed, a slurry bed, a fluidized bed, etc.
- a reaction process of the reverse shift reaction for example, a fixed bed, a supercritical fixed bed, a slurry bed, a fluidized bed, etc.
- carbon monoxide from carbon dioxide and hydrogen.
- water (steam) that is, in the reverse shift reaction
- the reverse shift catalyst structure can be used in the above-described method for producing carbon monoxide and water. The effect similar to the effect which shows can be acquired.
- a method for producing carbon monoxide and water may be provided in which carbon dioxide and hydrogen are converted into carbon monoxide and water (steam) using the above-described reverse shift reaction apparatus.
- a reverse shift reaction apparatus is not particularly limited as long as it can perform a reverse shift reaction using the above-described reverse shift catalyst structure.
- a normal use such as a reactor, a reaction tube, a reaction column, etc. Can be used.
- a reverse shift reaction apparatus having a reverse shift catalyst structure the same effects as those exhibited by the reverse shift catalyst structure can be obtained.
- the CO shift or reverse shift catalyst structure according to the present invention is a catalyst applicable to both the CO shift reaction and the reverse shift reaction, and suppresses a decrease in the catalyst function in any reaction. Long service life can be realized.
- a CO shift or reverse shift catalyst structure exhibits high catalytic activity, for example, by using the reverse shift catalyst structure for a reverse shift reaction, reverse shift in a high temperature environment that could not be used conventionally is used. It can be applied to the reaction.
- the CO shift or reverse shift catalyst structure and the manufacturing method thereof, the CO shift or reverse shift reaction apparatus, the carbon dioxide and hydrogen production method, and the carbon monoxide and water production method according to the embodiments of the present invention have been described.
- the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.
- type of precursor material (A) (“type of precursor material (A): surfactant”).
- CTL-41 hexadecyltrimethylammonium bromide (CTAB) (manufactured by Wako Pure Chemical Industries, Ltd.)
- SBA-1 Pluronic P123 (BASF)
- metal fine particles metal salt
- Co Cobalt nitrate (II) hexahydrate (Wako Pure Chemical Industries, Ltd.) Ni: Nickel nitrate (II) hexahydrate (Wako Pure Chemical Industries, Ltd.) ⁇ Fe: Iron nitrate (III) nonahydrate (Wako Pure Chemical Industries, Ltd.) Cu: Copper nitrate (II) trihydrate (manufactured by Wako Pure Chemical Industries, Ltd.)
- the metal-containing aqueous solution is added to the powdery precursor material (A) in small portions in small portions, and dried at room temperature (20 ° C. ⁇ 10 ° C.) for 12 hours or more to obtain the precursor material (B).
- polyoxyethylene (15) as an additive with respect to the precursor material (A) before adding the metal-containing aqueous solution Pretreatment was performed by adding an aqueous solution of oleyl ether (NIKKOL BO-15V, manufactured by Nikko Chemicals Co., Ltd.), and then the metal-containing aqueous solution was added as described above. In the case of “None” in the presence or absence of the additive, the pretreatment with the additive as described above is not performed.
- the addition amount of the metal-containing aqueous solution added to the precursor material (A) is the ratio of silicon (Si) constituting the precursor material (A) to the metal element (M) contained in the metal-containing aqueous solution (
- the numerical values when converted to the atomic ratio (Si / M) were adjusted to the values shown in Tables 1-8.
- precursor material (B) impregnated with the metal-containing aqueous solution obtained as described above was fired in the air at 600 ° C. for 24 hours to obtain a precursor material (C).
- the precursor material (C) obtained as described above and the structure-directing agent shown in Tables 1 to 8 are mixed to prepare a mixed aqueous solution.
- the mixture is prepared in a sealed container at 80 to 350 ° C. and Tables 1 to 8 are mixed.
- Hydrothermal treatment was performed under the conditions of pH and time shown in FIG. Thereafter, the produced precipitate was filtered off, washed with water, dried at 100 ° C. for 12 hours or more, and further calcined in air at 600 ° C. for 24 hours. Thereafter, the fired product was recovered and subjected to reduction treatment at 400 ° C. for 350 minutes under inflow of hydrogen gas to obtain a catalyst structure having a carrier and metal fine particles as a catalyst material shown in Tables 1 to 8 ( Examples 1 to 384).
- Comparative Example 1 Comparative Example 1, cobalt oxide powder (II, III) (manufactured by Sigma Aldrich Japan LLC) having an average particle size of 50 nm or less was mixed with MFI type silicalite, and hydrogen reduction treatment was performed in the same manner as in Example, As a result, a catalyst structure in which cobalt fine particles were adhered as a catalyst material to the outer surface of silicalite was obtained. MFI type silicalite was synthesized in the same manner as in Examples 52 to 57 except for the step of adding metal.
- Comparative Example 2 MFI type silicalite was synthesized by the same method as Comparative Example 1 except that the step of attaching cobalt fine particles was omitted.
- the catalyst structure in which the metal is fine particles (Fe, Co, Ni) made of iron, cobalt, nickel is cut out by FIB (focused ion beam) processing, and SEM (SU8020, Hitachi High Cross-sectional elemental analysis was performed using EDX (X-Max, manufactured by HORIBA, Ltd.).
- EDX X-Max, manufactured by HORIBA, Ltd.
- iron fine particles of various sizes are randomly present in a particle size range of about 50 nm to 400 nm, whereas each average particle size obtained from a TEM image is 1.2 nm to 2.0 nm.
- a scattering peak having a particle size of 10 nm or less was detected in the SAXS measurement result. From the SAXS measurement result and the cross-sectional measurement result by SEM / EDX, it was found that a catalyst substance having a particle size of 10 nm or less was present in the carrier in a very dispersed state with a uniform particle size.
- Quantification of the amount of metal was performed using ICP (high frequency inductively coupled plasma) alone or a combination of ICP and XRF (fluorescence X-ray analysis).
- XRF energy dispersive X-ray fluorescence spectrometer “SEA1200VX”, manufactured by SSI Nanotechnology Inc.
- SEA1200VX energy dispersive X-ray fluorescence spectrometer “SEA1200VX”, manufactured by SSI Nanotechnology Inc.
- the amount of metal included in the catalyst structure increased as the amount of the metal-containing solution added increased at least in the atomic ratio Si / M in the range of 50 to 1000. It was.
- Comparative Example 2 an experiment using only a carrier was performed. The CO gas flow rate of the gas containing CO was measured using a flow type microreactor apparatus, and the catalytic activity was evaluated.
- the CO conversion rate was calculated from the change in the CO gas flow rate between the catalyst layer inlet CO gas flow rate (mol / hour) and the catalyst layer outlet CO gas flow rate (mol / hour).
- the CO conversion rate is according to the following formula (I).
- CO conversion rate (%) (1 ⁇ (catalyst layer outlet CO gas flow rate (mol / hour)) / (catalyst layer inlet CO gas flow rate (mol / hour))) ⁇ 100 (I)
- Ratio of CO conversion rate (%) of second CO shift reaction to CO conversion rate (%) of first CO shift reaction ([CO conversion rate (%) of second CO shift reaction / CO of first time CO shift reaction) If the CO conversion rate (%) of the shift reaction] ⁇ 100) is 90% or more, the durability is judged to be particularly good, “ ⁇ ”, and if it is 80% or more and less than 90%, the durability is judged to be good. When “ ⁇ ” was 70% or more and less than 80%, the durability was judged as an acceptable level, and “ ⁇ ”, and when it was less than 70%, the durability was judged to be inferior, and “X” was assigned. The measurement and evaluation results are shown in Tables 1 to 8.
- Comparative Example 1 was also subjected to the same performance evaluation as in the above evaluations (1) and (2).
- the comparative example 2 is a support
- the evaluation method was the same as the evaluation method performed in “(1) Catalytic activity” in [D] “Performance evaluation”.
- the addition amount of the metal-containing solution added to the precursor material (A) is 50 to 200 in terms of the atomic ratio Si / M (the metal element of the metal fine particles (M It was found that the catalyst activity tends to be improved in the CO shift reaction when the content of) is 0.5 to 2.5% by mass).
- the catalytic activity in the reverse shift reaction was evaluated under the following conditions.
- the catalyst structures of the examples shown in Table 9 have good catalytic activity in the reverse shift reaction, and in particular, Examples 294, 295, 296, 319, 320, 342, 343
- the catalytic structures 344, 367, and 368 were excellent in catalytic activity in the reverse shift reaction. From this, it turned out that the catalyst structure of each Example shown by Table 9 can perform a reverse shift reaction at low temperature than before, and shows the outstanding catalyst performance.
- the catalyst structure of Comparative Example 1 in which the catalytic material is attached only to the outer surface of the carrier has improved catalytic activity in the CO shift reaction as compared with the carrier of Comparative Example 21 which does not have any catalytic material.
- the durability as a catalyst was inferior to the catalyst structures of Examples 1 to 384.
- the CO shift catalyst structure and the reverse shift catalyst structure according to the present invention exhibit excellent catalytic activity in the CO shift reaction and the reverse shift reaction, and are excellent in durability as a catalyst. .
- a method using a CO shift or reverse shift catalyst structure comprising:
- the catalytic CO shift or reverse shift medium structure includes a porous support composed of a zeolite-type compound and at least one metal fine particle present in the support, and the support communicates with each other.
- a method of using a CO shift or reverse shift catalyst structure characterized in that the fine metal particles are present in at least the diameter-expanded portion of the passage of the carrier.
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Abstract
Description
CO + H2O → CO2 + H2 ・・・(1)
CO2 + H2 → CO + H2O ・・・(2)
[1]ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つのCOシフトまたは逆シフト触媒物質と、
を備え、
前記担体が、互いに連通する通路を有し、
前記COシフトまたは逆シフト触媒物質が、前記担体の少なくとも前記通路に存在していることを特徴とするCOシフトまたは逆シフト触媒構造体。
[2]前記通路は、前記ゼオライト型化合物の骨格構造によって画定される一次元孔、二次元孔及び三次元孔のうちのいずれかと、前記一次元孔、前記二次元孔及び前記三次元孔のうちのいずれとも異なる拡径部とを有し、かつ
前記COシフトまたは逆シフト触媒物質が、少なくとも前記拡径部に存在していることを特徴とする、[1]に記載のCOシフトまたは逆シフト触媒構造体。
[3]前記拡径部は、前記一次元孔、前記二次元孔及び前記三次元孔のうちのいずれかを構成する複数の孔同士を連通している、[2]に記載のCOシフトまたは逆シフト触媒構造体。
[4]前記COシフトまたは逆シフト触媒物質は、金属微粒子であることを特徴とする、[2]または[3]に記載のCOシフトまたは逆シフト触媒構造体。
[5]前記金属微粒子は、コバルト、ニッケル、鉄および銅からなる群から選択される少なくとも1種の金属または金属酸化物で構成される微粒子であることを特徴とする、[4]に記載のCOシフトまたは逆シフト触媒構造体。
[6]前記金属微粒子は、コバルト、鉄および銅からなる群から選択される少なくとも1種の金属または金属酸化物で構成される微粒子であることを特徴とする、[5]に記載のCOシフトまたは逆シフト触媒構造体。
[7]前記金属微粒子の平均粒径が、前記通路の平均内径よりも大きく、且つ前記拡径部の内径以下であることを特徴とする、[4]~[6]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[8]前記金属微粒子の金属元素(M)が、前記COシフトまたは逆シフト触媒構造体に対して0.5~2.5質量%で含有されていることを特徴とする、[4]~[7]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[9]前記金属微粒子の平均粒径が、0.08nm~30nmであることを特徴とする、[4]~[8]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[10]前記金属微粒子の平均粒径が、0.4nm~11.0nmであることを特徴とする、[9]に記載のCOシフトまたは逆シフト触媒構造体。
[11]前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、0.05~300であることを特徴とする、[4]~[10]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[12]前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、0.1~30であることを特徴とする、[11]に記載のCOシフトまたは逆シフト触媒構造体。
[13]前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、1.4~3.6であることを特徴とする、[12]に記載のCOシフトまたは逆シフト触媒構造体。
[14]前記通路の平均内径は、0.1nm~1.5nmであり、
前記拡径部の内径は、0.5nm~50nmであることを特徴とする、[2]~[13]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[15]前記担体の外表面に保持された少なくとも1つの他のCOシフトまたは逆シフト触媒物質を更に備えることを特徴とする、[1]~[14]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[16]前記担体に内在する前記少なくとも1つのCOシフトまたは逆シフト触媒物質の含有量が、前記担体の外表面に保持された前記少なくとも1つの他のCOシフトまたは逆シフト触媒物質の含有量よりも多いことを特徴とする、[15]に記載のCOシフトまたは逆シフト触媒構造体。
[17]前記ゼオライト型化合物は、ケイ酸塩化合物であることを特徴とする、[1]~[16]のいずれかに記載のCOシフトまたは逆シフト触媒構造体。
[18][1]~[17]のいずれかに記載のCOシフトまたは逆シフト触媒構造体を有する、COシフトまたは逆シフト反応装置。
[19]ゼオライト型化合物で構成される多孔質構造の担体を得るための前駆体材料(A)に金属含有溶液が含浸された前駆体材料(B)を焼成する焼成工程と、
前記前駆体材料(B)を焼成して得られた前駆体材料(C)を水熱処理する水熱処理工程と、
前記水熱処理された前駆体材料(C)に還元処理を行う工程と、
を有することを特徴とするCOシフトまたは逆シフト触媒構造体の製造方法。
[20]前記焼成工程の前に、非イオン性界面活性剤を、前記前駆体材料(A)に対して50~500質量%添加することを特徴とする、[19]に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
[21]前記焼成工程の前に、前記前駆体材料(A)に前記金属含有溶液を複数回に分けて添加することで、前記前駆体材料(A)に前記金属含有溶液を含浸させることを特徴とする、[19]または[20]に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
[22]前記焼成工程の前に前記前駆体材料(A)に前記金属含有溶液を含浸させる際に、前記前駆体材料(A)に添加する前記金属含有溶液の添加量を、前記前駆体材料(A)に添加する前記金属含有溶液中に含まれる金属元素(M)に対する、前記前駆体材料(A)を構成するケイ素(Si)の比(原子数比Si/M)に換算して、10~1000となるように調整することを特徴とする、[19]~[21]のいずれかに記載のCOシフトまたは逆シフト触媒構造体の製造方法。
[23]前記水熱処理工程において、前記前駆体材料(C)と構造規定剤とを混合することを特徴とする、[19]に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
[24]前記水熱処理工程が塩基性雰囲気下で行われることを特徴とする、[19]に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
[25]触媒を用いて、一酸化炭素と水から二酸化炭素と水素を生成する二酸化炭素と水素の製造方法であって、前記触媒が、
ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つの金属微粒子と、を備え、
前記担体が、互いに連通する通路を有し、
前記金属微粒子が、前記担体の少なくとも前記通路の拡径部に存在しているCOシフト触媒構造体を含んでいることを特徴とする、二酸化炭素と水素の製造方法。
[26][1]~[17]のいずれかに記載のCOシフト触媒構造体を用いて、一酸化炭素と水から二酸化炭素と水素を生成することを特徴とする、二酸化炭素と水素の製造方法。
[27]一酸化炭素と水を、[18]に記載のCOシフト反応装置を用いて二酸化炭素と水素に変換することを特徴とする、二酸化炭素と水素の製造方法。
[28]触媒を用いて、二酸化炭素と水素から一酸化炭素と水を生成する一酸化炭素と水の製造方法であって、前記触媒が、
ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つの金属微粒子と、を備え、
前記担体が、互いに連通する通路を有し、
前記金属微粒子が、前記担体の少なくとも前記通路の拡径部に存在している逆シフト触媒構造体を含んでいることを特徴とする、一酸化炭素と水の製造方法。
[29][1]~[17]のいずれかに記載の逆シフト触媒構造体を用いて、二酸化炭素と水素から一酸化炭素と水を生成することを特徴とする、一酸化炭素と水の製造方法。
[30]二酸化炭素と水素を、[18]に記載の逆シフト反応装置を用いて一酸化炭素と水に変換することを特徴とする、一酸化炭素と水の製造方法。
図1は、本発明の実施形態に係るCOシフトまたは逆シフト触媒構造体の構成を概略的に示す図であり、(a)は斜視図(一部を横断面で示す。)、(b)は部分拡大断面図である。なお、図1におけるCOシフトまたは逆シフト触媒構造体は、その一例を示すものであり、本発明に係る各構成の形状、寸法等は、図1のものに限られないものとする。
COシフトまたは逆シフト触媒構造体1は、上記のとおり、多孔質構造の担体10と、担体10に内在する少なくとも1つのCOシフトまたは逆シフト触媒物質20とを備える。COシフト触媒構造体1は、担体10に内在するCOシフト触媒物質20がCO含有混合ガスと接触することにより、COシフト触媒物質20によるCOシフト触媒能を発揮する。具体的に、COシフト触媒構造体1の外表面10aに接触したCO含有混合ガスは、外表面10aに形成された孔11aから担体10内部に流入して通路11内に誘導され、通路11内を通って移動し、他の孔11aを通じてCOシフト触媒構造体1の外部へ出る。CO含有混合ガスが通路11内を通って移動する経路において、通路11に保持されたCOシフト触媒物質20と接触することによって、COシフト触媒物質20のCOシフト触媒反応が生じる。
また、COシフトまたは逆シフト触媒構造体1を用いて、COシフトまたは逆シフト触媒構造体を有するCOシフトまたは逆シフト反応装置が形成されてもよい。上記実施形態例に係るCOシフトまたは逆シフト触媒構造体1を用いることで、上記と同様の効果を奏するCOシフトまたは逆シフト反応装置を得ることができる。
図3は、図1のCOシフトまたは逆シフト触媒構造体1の製造方法を示すフローチャートである。以下、担体に内在するCOシフトまたは逆シフト触媒物質が金属微粒子である場合を例に、COシフトまたは逆シフト触媒構造体の製造方法の一例を説明する。
図3に示すように、先ず、ゼオライト型化合物で構成される多孔質構造の担体を得るための前駆体材料(A)を準備する。前駆体材料(A)は、好ましくは規則性メソ細孔物質であり、COシフトまたは逆シフト触媒構造体の担体を構成するゼオライト型化合物の種類(組成)に応じて適宜選択できる。
次に、準備した前駆体材料(A)に、金属含有溶液を含浸させ、前駆体材料(B)を得る。
次に、ゼオライト型化合物で構成される多孔質構造の担体を得るための前駆体材料(A)に金属含有溶液が含浸された前駆体材料(B)を焼成して、前駆体材料(C)を得る。
次いで、前駆体材料(C)と構造規定剤とを混合した混合溶液を調製し、前記前駆体材料(B)を焼成して得られた前駆体材料(C)を水熱処理して、COシフトまたは逆シフト触媒構造体を得る。
図4は、図1のCOシフトまたは逆シフト触媒構造体1の変形例を示す模式図である。図1のCOシフトまたは逆シフト触媒構造体1は、担体10と、担体10に内在するCOシフトまたは逆シフト触媒物質20とを備える場合を示しているが、この構成だけには限定されず、例えば、図4に示すように、COシフトまたは逆シフト触媒構造体2が、担体10の外表面10aに保持された他のCOシフトまたは逆シフト触媒物質30を更に備えていてもよい。
また、本発明において、触媒を用いて、一酸化炭素と水(水蒸気)から二酸化炭素と水素を生成する二酸化炭素と水素の製造方法が提供される。このような触媒は、ゼオライト型化合物で構成される多孔質構造の担体10と、担体10に内在する少なくとも1つの金属微粒子20と、を備え、担体10が、互いに連通する通路11を有し、金属微粒子20が、担体10の少なくとも通路11の拡径部12に存在しているCOシフト触媒構造体1を含んでいる。すなわち、本発明では、上述のCOシフト触媒構造体を用いて、一酸化炭素と水(水蒸気)から二酸化炭素と水素を生成する二酸化炭素と水素の製造方法が提供される。
さらに、本発明において、触媒を用いて、二酸化炭素と水素から一酸化炭素と水(水蒸気)を生成する一酸化炭素と水の製造方法も提供される。このような触媒は、ゼオライト型化合物で構成される多孔質構造の担体10と、担体10に内在する少なくとも1つの金属微粒子20と、を備え、担体10が、互いに連通する通路11を有し、金属微粒子20が、担体10の少なくとも通路11の拡径部12に存在している逆シフト触媒構造体1を含んでいる。すなわち、本発明では、上述の逆シフト触媒構造体を用いて、二酸化炭素と水素から一酸化炭素と水(水蒸気)を生成する一酸化炭素と水の製造方法が提供される。
[前駆体材料(A)の合成]
シリカ剤(テトラエトキシシラン(TEOS)、和光純薬工業株式会社製)と、鋳型剤としての界面活性剤とを混合した混合水溶液を作製し、適宜pH調整を行い、密閉容器内で、80~350℃、100時間、水熱処理を行った。その後、生成した沈殿物をろ別し、水およびエタノールで洗浄し、さらに600℃、24時間、空気中で焼成して、表1~8に示される種類および孔径の前駆体材料(A)を得た。なお、界面活性剤は、前駆体材料(A)の種類に応じて(「前駆体材料(A)の種類:界面活性剤」)以下のものを用いた。
・MCM-41:ヘキサデシルトリメチルアンモニウムブロミド(CTAB)(和光純薬工業株式会社製)
・SBA-1:Pluronic P123(BASF社製)
次に、表1~8に示される種類の金属微粒子を構成する金属元素(M)に応じて、該金属元素(M)を含有する金属塩を、水に溶解させて、金属含有水溶液を調製した。なお、金属塩は、金属微粒子の種類に応じて(「金属微粒子:金属塩」)以下のものを用いた。
・Co:硝酸コバルト(II)六水和物(和光純薬工業株式会社製)
・Ni:硝酸ニッケル(II)六水和物(和光純薬工業株式会社製)
・Fe:硝酸鉄(III)九水和物(和光純薬工業株式会社製)
・Cu:硝酸銅(II)三水和物(和光純薬工業株式会社製)
比較例1では、MFI型シリカライトに平均粒径50nm以下の酸化コバルト粉末(II,III)(シグマ アルドリッチ ジャパン合同会社製)を混合し、実施例と同様にして水素還元処理を行って、担体としてのシリカライトの外表面に、触媒物質としてコバルト微粒子を付着させた触媒構造体を得た。MFI型シリカライトは、金属を添加する工程以外は、実施例52~実施例57と同様の方法で合成した。
比較例2では、コバルト微粒子を付着させる工程を省略したこと以外は、比較例1と同様の方法にてMFI型シリカライトを合成した。
担体と触媒物質とを備える上記実施例の触媒構造体および比較例のシリカライトについて、以下に示す条件で、各種特性評価を行った。
上記実施例の触媒構造体および比較例のシリカライトについて、粉砕法にて観察試料を作製し、透過電子顕微鏡(TEM)(TITAN G2、FEI社製)を用いて、断面観察を行った。その結果、上記実施例の触媒構造体では、シリカライトまたはゼオライトからなる担体の内部に触媒物質が内在し、保持されていることが確認された。一方、比較例1のシリカライトでは、触媒物質が担体の外表面に付着しているのみで、担体の内部には存在していなかった。
上記評価[A]で行った断面観察により撮影したTEM画像にて、担体の通路を、任意に500個選択し、それぞれの長径および短径を測定し、その平均値からそれぞれの内径を算出し(N=500)、さらに内径の平均値を求めて、担体の通路の平均内径DFとした。また、触媒物質についても同様に、上記TEM画像から、触媒物質を、任意に500個選択し、それぞれの粒径を測定して(N=500)、その平均値を求めて、触媒物質の平均粒径DCとした。結果を表1~8に示す。
原子数比Si/M=50、100、200、1000(M=Co、Ni、Fe、Cu)の添加量で、金属微粒子を担体内部に包接させた触媒構造体を作製し、その後、上記添加量で作製された触媒構造体の担体内部に包接された金属量(質量%)を測定した。尚、本測定において原子数比Si/M=100、200、1000の触媒構造体は、それぞれ実施例1~384のうちの原子数比Si/M=100、200、1000の触媒構造体と同様の方法で金属含有溶液の添加量を調整して作製し、原子数比Si/M=50の触媒構造体は、金属含有溶液の添加量を異ならせたこと以外は、原子数比Si/M=100、200、1000の触媒構造体と同様の方法で作製した。
上記実施例の触媒構造体および比較例のシリカライトについて、触媒物質がもつ触媒能を評価した。結果を表1~8に示す。
触媒活性は、以下の条件で評価した。
耐久性は、以下の条件で評価した。
COシフトまたは逆シフト触媒構造体を使用する方法であって、
前記触COシフトまたは逆シフト媒構造体が、ゼオライト型化合物で構成される多孔質構造の担体と、前記担体に内在する少なくとも1つの金属微粒子と、を備え、前記担体が、互いに連通する通路を有し、前記金属微粒子が、前記担体の少なくとも前記通路の拡径部に存在していることを特徴とする、COシフトまたは逆シフト触媒構造体を使用する方法。
2 COシフト触媒構造体、逆シフト触媒構造体
10 担体
10a 外表面
11 通路
11a 孔
12 拡径部
20 COシフト触媒物質、逆シフト触媒物質
30 COシフト触媒物質、逆シフト触媒物質
DC 平均粒径
DF 平均内径
DE 内径
Claims (30)
- ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つのCOシフトまたは逆シフト触媒物質と、
を備え、
前記担体が、互いに連通する通路を有し、
前記COシフトまたは逆シフト触媒物質が、前記担体の少なくとも前記通路に存在していることを特徴とするCOシフトまたは逆シフト触媒構造体。 - 前記通路は、前記ゼオライト型化合物の骨格構造によって画定される一次元孔、二次元孔及び三次元孔のうちのいずれかと、前記一次元孔、前記二次元孔及び前記三次元孔のうちのいずれとも異なる拡径部とを有し、かつ
前記COシフトまたは逆シフト触媒物質が、少なくとも前記拡径部に存在していることを特徴とする、請求項1に記載のCOシフトまたは逆シフト触媒構造体。 - 前記拡径部は、前記一次元孔、前記二次元孔及び前記三次元孔のうちのいずれかを構成する複数の孔同士を連通している、請求項2に記載のCOシフトまたは逆シフト触媒構造体。
- 前記COシフトまたは逆シフト触媒物質は、金属微粒子であることを特徴とする、請求項2または3に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子は、コバルト、ニッケル、鉄および銅からなる群から選択される少なくとも1種の金属または金属酸化物で構成される微粒子であることを特徴とする、請求項4に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子は、コバルト、鉄および銅からなる群から選択される少なくとも1種の金属または金属酸化物で構成される微粒子であることを特徴とする、請求項5に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子の平均粒径が、前記通路の平均内径よりも大きく、且つ前記拡径部の内径以下であることを特徴とする、請求項4~6のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子の金属元素(M)が、前記COシフトまたは逆シフト触媒構造体に対して0.5~2.5質量%で含有されていることを特徴とする、請求項4~7のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子の平均粒径が、0.08nm~30nmであることを特徴とする、請求項4~8のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 前記金属微粒子の平均粒径が、0.4nm~11.0nmであることを特徴とする、請求項9に記載のCOシフトまたは逆シフト触媒構造体。
- 前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、0.05~300であることを特徴とする、請求項4~10のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、0.1~30であることを特徴とする、請求項11に記載のCOシフトまたは逆シフト触媒構造体。
- 前記通路の平均内径に対する前記金属微粒子の平均粒径の割合が、1.4~3.6であることを特徴とする、請求項12に記載のCOシフトまたは逆シフト触媒構造体。
- 前記通路の平均内径は、0.1nm~1.5nmであり、
前記拡径部の内径は、0.5nm~50nmであることを特徴とする、請求項2~13のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。 - 前記担体の外表面に保持された少なくとも1つの他のCOシフトまたは逆シフト触媒物質を更に備えることを特徴とする、請求項1~14のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 前記担体に内在する前記少なくとも1つのCOシフトまたは逆シフト触媒物質の含有量が、前記担体の外表面に保持された前記少なくとも1つの他のCOシフトまたは逆シフト触媒物質の含有量よりも多いことを特徴とする、請求項15に記載のCOシフトまたは逆シフト触媒構造体。
- 前記ゼオライト型化合物は、ケイ酸塩化合物であることを特徴とする、請求項1~16のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体。
- 請求項1~17のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体を有する、COシフトまたは逆シフト反応装置。
- ゼオライト型化合物で構成される多孔質構造の担体を得るための前駆体材料(A)に金属含有溶液が含浸された前駆体材料(B)を焼成する焼成工程と、
前記前駆体材料(B)を焼成して得られた前駆体材料(C)を水熱処理する水熱処理工程と、
前記水熱処理された前駆体材料(C)に還元処理を行う工程と、
を有することを特徴とするCOシフトまたは逆シフト触媒構造体の製造方法。 - 前記焼成工程の前に、非イオン性界面活性剤を、前記前駆体材料(A)に対して50~500質量%添加することを特徴とする、請求項19に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
- 前記焼成工程の前に、前記前駆体材料(A)に前記金属含有溶液を複数回に分けて添加することで、前記前駆体材料(A)に前記金属含有溶液を含浸させることを特徴とする、請求項19または20に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
- 前記焼成工程の前に前記前駆体材料(A)に前記金属含有溶液を含浸させる際に、前記前駆体材料(A)に添加する前記金属含有溶液の添加量を、前記前駆体材料(A)に添加する前記金属含有溶液中に含まれる金属元素(M)に対する、前記前駆体材料(A)を構成するケイ素(Si)の比(原子数比Si/M)に換算して、10~1000となるように調整することを特徴とする、請求項19~21のいずれか1項に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
- 前記水熱処理工程において、前記前駆体材料(C)と構造規定剤とを混合することを特徴とする、請求項19に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
- 前記水熱処理工程が塩基性雰囲気下で行われることを特徴とする、請求項19に記載のCOシフトまたは逆シフト触媒構造体の製造方法。
- 触媒を用いて、一酸化炭素と水から二酸化炭素と水素を生成する二酸化炭素と水素の製造方法であって、前記触媒が、
ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つの金属微粒子と、を備え、
前記担体が、互いに連通する通路を有し、
前記金属微粒子が、前記担体の少なくとも前記通路の拡径部に存在しているCOシフト触媒構造体を含んでいることを特徴とする、二酸化炭素と水素の製造方法。 - 請求項1~17のいずれか1項に記載のCOシフト触媒構造体を用いて、一酸化炭素と水から二酸化炭素と水素を生成することを特徴とする、二酸化炭素と水素の製造方法。
- 一酸化炭素と水を、請求項18に記載のCOシフト反応装置を用いて二酸化炭素と水素に変換することを特徴とする、二酸化炭素と水素の製造方法。
- 触媒を用いて、二酸化炭素と水素から一酸化炭素と水を生成する一酸化炭素と水の製造方法であって、前記触媒が、
ゼオライト型化合物で構成される多孔質構造の担体と、
前記担体に内在する少なくとも1つの金属微粒子と、を備え、
前記担体が、互いに連通する通路を有し、
前記金属微粒子が、前記担体の少なくとも前記通路の拡径部に存在している逆シフト触媒構造体を含んでいることを特徴とする、一酸化炭素と水の製造方法。 - 請求項1~17のいずれか1項に記載の逆シフト触媒構造体を用いて、二酸化炭素と水素から一酸化炭素と水を生成することを特徴とする、一酸化炭素と水の製造方法。
- 二酸化炭素と水素を、請求項18に記載の逆シフト反応装置を用いて一酸化炭素と水に変換することを特徴とする、一酸化炭素と水の製造方法。
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| JP7462899B2 (ja) | 2020-03-12 | 2024-04-08 | 古河電気工業株式会社 | 移動式反応システム |
| JPWO2021201190A1 (ja) * | 2020-03-31 | 2021-10-07 | ||
| JP7822928B2 (ja) | 2020-03-31 | 2026-03-03 | 大阪瓦斯株式会社 | 逆水性ガスシフト触媒の製造方法 |
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| JPWO2018221698A1 (ja) | 2020-04-02 |
| JP7306990B2 (ja) | 2023-07-11 |
| EP3632542A1 (en) | 2020-04-08 |
| CN110691646A (zh) | 2020-01-14 |
| US20200114338A1 (en) | 2020-04-16 |
| US11666894B2 (en) | 2023-06-06 |
| EP3632542A4 (en) | 2021-01-06 |
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