EP1441848A2 - Corps permettant l'isolation d'une composante contenue dans un melange gazeux - Google Patents

Corps permettant l'isolation d'une composante contenue dans un melange gazeux

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Publication number
EP1441848A2
EP1441848A2 EP02796494A EP02796494A EP1441848A2 EP 1441848 A2 EP1441848 A2 EP 1441848A2 EP 02796494 A EP02796494 A EP 02796494A EP 02796494 A EP02796494 A EP 02796494A EP 1441848 A2 EP1441848 A2 EP 1441848A2
Authority
EP
European Patent Office
Prior art keywords
bodies
separation
bed
shell
gas mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02796494A
Other languages
German (de)
English (en)
Inventor
Frank Bretschneider
Constant Van Lookeren
Manfred Nebelung
Hagen Klemm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IPC Process Center GmbH and Co KG
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
IPC Process Center GmbH and Co KG
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IPC Process Center GmbH and Co KG, Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical IPC Process Center GmbH and Co KG
Priority to EP04019108A priority Critical patent/EP1479436A3/fr
Publication of EP1441848A2 publication Critical patent/EP1441848A2/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/043—Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B01J20/28021—Hollow particles, e.g. hollow spheres, microspheres or cenospheres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • B01J20/28059—Surface area, e.g. B.E.T specific surface area being less than 100 m2/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
    • B01J20/3293—Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/408—Alkaline earth metal or magnesium compounds of barium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/606—Carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B01D2253/1124—Metal oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/116—Molecular sieves other than zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/304—Linear dimensions, e.g. particle shape, diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/306—Surface area, e.g. BET-specific surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/311—Porosity, e.g. pore volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/05—Methods of making filter

Definitions

  • the invention relates to bodies for the separation of a component contained in a gas mixture.
  • the gas mixtures can be, for example, raw gases containing hydrocarbons, such as natural gas, or also exhaust gas. Harmful components contained in such gas mixtures, e.g. Sulfur can also be removed in the form of compounds in order to make the gas mixture free of negative properties during further use and processing or to release gas free of harmful components to the environment.
  • nitrogen or nitrogen oxides can also be separated in order to improve their suitability for combustion or to release almost nitrogen oxide-free exhaust gases into the environment.
  • phosphorus, halogens or their compounds can also be separated.
  • Such gas mixtures are cleaned using solid substances, the separation being carried out by sorption.
  • the surface of the material used can be used to ensure a higher separation capacity.
  • an increase in surface area can be achieved by the geometric design and in particular the specific surface of a fabric by the porosity.
  • suitable materials mainly chemical compounds, have been used as granules in a wide variety of grain sizes and a favorable porosity, often set by appropriate sintering.
  • the gas mixture to be cleaned or freed from a component is then passed through a fixed bed formed from a bed of the granulate and the respective component to be separated is sorbed.
  • the bed forms a throttle point for the gas flow, so that a dynamic pressure which is influenced by the grain size and the dimensioning of the bed is recorded on the inlet side.
  • This requires an increased output for gas production.
  • abrasion occurs, which impedes the gas flow and this effect can severely limit the service life of a bed, so that an exchange in relatively short time intervals is necessary.
  • each substance suitable for separation has a limited separation capacity, essentially influenced by the usable surface and mass. and a saturation range, so that full use cannot usually take place.
  • bodies should be used for the separation selected components from gas mixtures are used, the active area for the separation is designed in the form of a porous shell.
  • This shell can enclose at least one cavity or at least one core that is not active for the separation on all sides, so that a closed body is formed.
  • the term pores should not include the individual pores.
  • This body is particularly preferably spherically curved and can also be designed as a hollow sphere.
  • a spherical shape is not only advantageous because of the spherical geometry with a large surface area, but also offers favorable fluidic conditions when a gas mixture is passed through a bed formed from such bodies during the separation, since a correspondingly reduced dynamic pressure is reached at the inlet side of such a bed can be.
  • the bodies according to the invention can optionally also be hollow cylinders.
  • the shell shape with a correspondingly limited thickness up to a maximum of 5 mm, preferably less than 2 mm, can also ensure an almost constant separation performance over a large usable period, this being guaranteed at least up to the vicinity of the saturation limit. This can improve the quality of separation, and consequently that of
  • the degree of purity of the treated gas was kept constant and also reduce operating costs.
  • the bodies according to the invention can be used for the separation at least up to a load which is close to the saturation limit without the gas purity being significantly influenced.
  • Spherical bodies can be produced in a manner known per se.
  • a powder which essentially consists of a substance suitable for the respective component to be separated, is applied as a dispersion / suspension to a spherical core and, after drying, is subjected to sintering.
  • the core can consist of a material which is inactive for the separation, but the thermal behavior of this material should be taken into account, taking into account the thermal expansion and shrinkage during sintering, in order to avoid cracking of the shell as far as possible.
  • the core can also be made of an organic material, e.g. Pre-expanded polystyrene exist, which can be safely expelled at temperatures below 700 ° C, so that in these cases the bodies are present as hollow spheres.
  • the ratio of the outside diameter to the shell thickness should be in the range from 2 to 1 to 10 to 1, the smaller ratios with small outside diameters of the bodies being preferred. If possible, the shell thickness should not be greater than 3 mm, whereby an upper limit of 8 mm should not be exceeded.
  • the mechanical strength and porosity of the shell can be influenced by the powder used, in particular its grain size, possibly with additives that remain in the shell and the sintering conditions. the.
  • the sintering should be carried out in such a way that just sufficient mechanical strength with the highest possible porosity is achieved.
  • outer dimensions (outer diameter) and the mass of the body according to the invention can be varied taking into account the respective application, the porosity being kept constant.
  • sintering aids for example SiO 2
  • the proportion of SiO 2 should be less than 10% by mass, preferably less than 5% by mass.
  • the shell can be made from different materials. It can be formed from metal oxides or metal oxide mixtures, with oxides of II-valent metals being preferred. For example, for the separation of sulfur in the form of hydrogen sulfide with oxides of II-valent metals (e.g. Cu, Fe, Co, Ni, Zn) can be separated from a gas mixture, such as natural gas, by chemical conversion.
  • a gas mixture such as natural gas
  • ZnO react with H 2 S to ZnS and
  • ZnS is chemically more stable than H 2 S and can be held in solid form on the body.
  • ZnS can react with H 2 O to form sulfuric acid, ZnO again forming in the shell at the same time, which can be used for a new separation.
  • bodies made of Al 2 0 3 can be used as a catalyst.
  • the Al 2 0 3 can also form the shell of such a body.
  • the so-called Claus process can then be carried out with these catalysts and the ZnO bodies, in which S0 2 and 2H 2 S react catalytically to 3S and 2H 2 0.
  • Certain zeolites which are also known per se, can also be used for the separation of sulfur compounds.
  • Zeolites as they are referred to, for example, in US Pat. No. 6,197,092, can also be used as so-called molecular sieves for the separation of nitrogen, this advantageously being possible by means of a pressure swing adsorption process (PSA) which is also mentioned there ,
  • PSA pressure swing adsorption process
  • Phosphorus, halogens or their compounds can also be separated using such molecular sieves.
  • BaC0 3 can be used as the shell material, which reacts with N0 2 to form BaO. Regeneration is also possible here.
  • the BaO formed is heated (T approx. 450 ° C.) and BaC0 3 can be formed again with carbon compounds (for example C0 2 ).
  • the bodies according to the invention can also be used for gas drying and e.g. Extract water or water vapor from a gas / gas mixture.
  • the bodies according to the invention can be used in devices in which, in containers through which a gas mixture for the separation is passed, at least one body is formed from a bed of so-called fixed beds.
  • the bodies can also form a fluidized bed or fluid bed, in particular because of their increased strength with the same porosity, the gas mixture being used with an increased volume flow.
  • Such a bed can also be formed by bodies moved as a result of gravitational or mechanical forces. The bodies can be continuously fed to the area of such a bed that is active for the separation, removed from the bed with the component loaded with the component to be separated, fed to a regeneration and returned to the circuit.
  • the gas mixture flows through this bed for separation and a component is held there by chemical and / or physical effects, so that gas emerging from this bed or a cascade of several such beds is largely free of this component.
  • regeneration is necessary. This can be achieved by supplying heat, ie heating the beds or the entire container. In particular when ZnS is formed, the regeneration can also be carried out by adding water. Water vapor or fluid containing water vapor can be passed through the bed in order to trigger the regression of ZnS to ZnO.
  • Switching from one container to the other can be time-controlled but also regulated, in the latter case the concentration of the corresponding component in the emerging gas stream being determined and when a limit value is exceeded, the switching of the gas flow to another container is initiated.
  • Form beds can have at least approximately the same outside dimensions / outside diameter in each bed.
  • Bodies with different dimensions can be used in several beds forming a cascade and there is the possibility of using bodies with different outside dimensions / outside diameters in one bed.
  • the flow conditions of the gas mixture should be influenced in such a way that the pressure drop is kept as small as possible and nevertheless there is sufficient contact or dwell time in the beds for the separation.
  • the bodies according to the invention should be present in the beds as a loose bed, without the use of binders.
  • a catalytically active substance can also advantageously be additionally present in the beds, with which the separation is facilitated, made possible and, if necessary, the required reaction time or energy supplied can be reduced.
  • Such a catalytically active substance for example platinum
  • nitrogen monoxide can be catalytic oxidized to nitrogen dioxide and nitrogen dioxide can be separated from an exhaust gas by chemical reaction with BaC03.
  • Figure 1 is a diagram of the time course of the
  • Solid spheres were produced as a comparative example and hollow spheres as bodies according to the invention.
  • the specific breaking strength of the hollow bodies according to the invention was 2.9 MPa, whereas the solid spheres only reached 1.99 MPa.
  • the specific surface of the comparison body was 41.7 m 2 / g and that of the body according to the invention was 48.6 m 2 / g.
  • the temperature was kept constant at 400 ° C.
  • the load was measured in mg over time.
  • the increase in the mass increase representing the separation of hydrogen sulfide from the gas mixture turns out to be significantly smaller, at least after reaching about 50% of the maximum separation capacity, that is to say before the saturation limit has been reached for the full comparison bodies.
  • the result of this is that, after a certain time, significantly less hydrogen sulfide can be separated and chemically converted into ZnS than is possible with the hollow spherical bodies according to the invention.
  • a total mass of 332 g / l of hydrogen sulfide could be separated in both investigations.
  • this mass could already be reached after 38 minutes, whereas the comparison bodies required 57 minutes, which also demonstrates an increased separation effect, that is to say not only faster but also a larger amount of hydrogen sulfide can be separated from a gas mixture and a higher purity of a gas mixture treated in this way can be recorded.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

La présente invention concerne un corps permettant l'isolation d'une composante contenue dans un mélange gazeux, les mélanges gazeux pouvant être des gaz bruts contenant des hydrocarbures tel que du gaz naturel, ou des gaz d'échappement. Selon l'invention, les corps utilisés doivent permettre l'isolation de composantes des mélanges gazeux, sur des durées importantes, avec un rendement approximativement constant. A cet effet, le corps de l'invention présente, pour réaliser l'isolation, des zones actives qui se présentent sous la forme d'une coque poreuse. Ces corps présentant une coque poreuse peuvent être mis en place dans un dispositif, et, à l'intérieur d'un récipient peut se trouver au moins un lit formé par un déversement de ces corps, par lequel passe le mélange gazeux pour permettre l'isolation de la composant indésirable. L'invention présente des avantages particulièrement pour l'isolation de composés de soufre contenus dans des mélanges gazeux.
EP02796494A 2001-11-08 2002-11-06 Corps permettant l'isolation d'une composante contenue dans un melange gazeux Withdrawn EP1441848A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04019108A EP1479436A3 (fr) 2001-11-08 2002-11-06 Méthode de préparation de corps creux poreux pour la séparation d'un composé d'un mélange gazeux

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10155643A DE10155643A1 (de) 2001-11-08 2001-11-08 Körper für die Separation einer in einem Gasgemisch enthaltenen Komponente
DE10155643 2001-11-08
PCT/DE2002/004158 WO2003040259A2 (fr) 2001-11-08 2002-11-06 Corps permettant l'isolation d'une composante contenue dans un melange gazeux

Related Child Applications (1)

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EP04019108.2 Division-Into 2004-08-12

Publications (1)

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EP1441848A2 true EP1441848A2 (fr) 2004-08-04

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Family Applications (2)

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EP04019108A Ceased EP1479436A3 (fr) 2001-11-08 2002-11-06 Méthode de préparation de corps creux poreux pour la séparation d'un composé d'un mélange gazeux
EP02796494A Withdrawn EP1441848A2 (fr) 2001-11-08 2002-11-06 Corps permettant l'isolation d'une composante contenue dans un melange gazeux

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04019108A Ceased EP1479436A3 (fr) 2001-11-08 2002-11-06 Méthode de préparation de corps creux poreux pour la séparation d'un composé d'un mélange gazeux

Country Status (6)

Country Link
US (1) US7014689B2 (fr)
EP (2) EP1479436A3 (fr)
JP (1) JP2005508251A (fr)
AU (1) AU2002361926A1 (fr)
DE (1) DE10155643A1 (fr)
WO (1) WO2003040259A2 (fr)

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US7749474B2 (en) 2004-08-12 2010-07-06 Ford Global Technologies, Llc Catalyst composition for use in a lean NOx trap and method of using
US7137249B2 (en) 2004-08-12 2006-11-21 Ford Global Technologies, Llc Thermally stable lean nox trap
JP2007160166A (ja) * 2005-12-12 2007-06-28 Toyota Motor Corp 常温ＮＯｘ吸着材
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US9289714B1 (en) 2014-10-17 2016-03-22 JuvanCo Industries, LLC Device for adsorbing the hydrogen sulfide component of exhausted calibration gases
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Also Published As

Publication number Publication date
WO2003040259A3 (fr) 2003-07-24
EP1479436A3 (fr) 2004-12-29
US20050072305A1 (en) 2005-04-07
WO2003040259A2 (fr) 2003-05-15
EP1479436A2 (fr) 2004-11-24
US7014689B2 (en) 2006-03-21
DE10155643A1 (de) 2003-05-28
AU2002361926A1 (en) 2003-05-19
JP2005508251A (ja) 2005-03-31

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