PL437780A1 - Catalyst for reduction of nitrogen oxides and method of catalytic reduction of nitrogen oxides - Google Patents
Catalyst for reduction of nitrogen oxides and method of catalytic reduction of nitrogen oxidesInfo
- Publication number
- PL437780A1 PL437780A1 PL437780A PL43778021A PL437780A1 PL 437780 A1 PL437780 A1 PL 437780A1 PL 437780 A PL437780 A PL 437780A PL 43778021 A PL43778021 A PL 43778021A PL 437780 A1 PL437780 A1 PL 437780A1
- Authority
- PL
- Poland
- Prior art keywords
- nitrogen oxides
- sub
- nanoparticles
- reduction
- catalytic
- Prior art date
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title abstract 15
- 239000003054 catalyst Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 4
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract 3
- 238000006722 reduction reaction Methods 0.000 title abstract 2
- 239000002105 nanoparticle Substances 0.000 abstract 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 4
- 230000003197 catalytic effect Effects 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- 229910052763 palladium Inorganic materials 0.000 abstract 2
- 229910052702 rhenium Inorganic materials 0.000 abstract 2
- 229910021524 transition metal nanoparticle Inorganic materials 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
Classifications
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/36—Rhenium
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/755—Nickel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Nanotechnology (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Catalysts (AREA)
Abstract
Przedmiotem wynalazku jest katalizator do redukcji tlenków azotu oraz sposób katalitycznej redukcji tlenków azotu z gazów stanowiących produkty spalania, celem ograniczenia ich szkodliwości dla środowiska. Katalizator według wynalazku stanowi niklowy nośnik katalityczny z naniesioną na nim fazą aktywną w postaci nanocząstek metali przejściowych Pd oraz Re, o rozmiarach nanocząstek od 1 do 100 nm, korzystnie dla Pd poniżej 20 nm, a dla Re poniżej 10 nm, przy czym zawartość nanocząstek fazy aktywnej na powierzchni nośnika katalitycznego wynosi od 0,01% wag. do 6% wag., a stosunek molowy nanocząstek Pd do Re wynosi od 110 : 1 do 8 : 1. Przedmiotem zgłoszenia jest także sposób katalitycznej redukcji tlenków azotu według wynalazku, który polega na tym, że strumień gazu w postaci NO<sub>2</sub> + O<sub>2</sub> + NH<sub>3</sub> przepuszcza się z natężeniem przepływu w zakresie od 0,5 do 10 dm<sup>3</sup>/h, przez umieszczone w reaktorze złoże katalizatora stanowiącego niklowy nośnik katalityczny z naniesioną na nim fazą aktywną w postaci nanocząstek metali przejściowych Pd oraz Re, o rozmiarach nanocząstek od 1 do 100 nm, korzystnie dla Pd poniżej 20 nm a dla Re poniżej 10 nm, przy czym zawartość nanocząstek fazy aktywnej na powierzchni nośnika katalitycznego wynosi od 0,01% wag. do 6% wag., a stosunek molowy nanocząstek Pd do Re wynosi od 110 : 1 do 8 : 1, a proces prowadzi się w temperaturze od 100°C do 550°C.The subject of the invention is a catalyst for the reduction of nitrogen oxides and a method for the catalytic reduction of nitrogen oxides from combustion products gases in order to reduce their harmfulness to the environment. The catalyst according to the invention is a nickel catalytic carrier with an active phase deposited on it in the form of Pd and Re transition metal nanoparticles, with nanoparticle sizes from 1 to 100 nm, preferably for Pd below 20 nm, and for Re below 10 nm, and the content of phase nanoparticles % active on the surface of the catalytic carrier is from 0.01 wt. to 6 wt.%, and the molar ratio of Pd to Re nanoparticles is from 110:1 to 8:1. The subject of the application is also the method of catalytic reduction of nitrogen oxides according to the invention, which consists in the gas stream in the form of NO<sub>2 </sub> + O<sub>2</sub> + NH<sub>3</sub> is passed at a flow rate ranging from 0.5 to 10 dm<sup>3</sup>/h, through placed in the reactor, a catalyst bed consisting of a nickel catalytic carrier with an active phase deposited on it in the form of Pd and Re transition metal nanoparticles, with nanoparticle sizes from 1 to 100 nm, preferably for Pd below 20 nm and for Re below 10 nm, the content of nanoparticles % of the active phase on the surface of the catalytic support is from 0.01 wt. to 6 wt.%, and the molar ratio of Pd to Re nanoparticles is from 110:1 to 8:1, and the process is carried out at a temperature of from 100°C to 550°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL437780A PL243044B1 (en) | 2021-05-06 | 2021-05-06 | Catalyst for reduction of nitrogen oxides and method of catalytic reduction of nitrogen oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL437780A PL243044B1 (en) | 2021-05-06 | 2021-05-06 | Catalyst for reduction of nitrogen oxides and method of catalytic reduction of nitrogen oxides |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL437780A1 true PL437780A1 (en) | 2022-11-07 |
| PL243044B1 PL243044B1 (en) | 2023-06-12 |
Family
ID=83944933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL437780A PL243044B1 (en) | 2021-05-06 | 2021-05-06 | Catalyst for reduction of nitrogen oxides and method of catalytic reduction of nitrogen oxides |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL243044B1 (en) |
-
2021
- 2021-05-06 PL PL437780A patent/PL243044B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL243044B1 (en) | 2023-06-12 |
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