NO950854L - Selective catalytic reduction of nitrogen oxides - Google Patents
Selective catalytic reduction of nitrogen oxidesInfo
- Publication number
- NO950854L NO950854L NO950854A NO950854A NO950854L NO 950854 L NO950854 L NO 950854L NO 950854 A NO950854 A NO 950854A NO 950854 A NO950854 A NO 950854A NO 950854 L NO950854 L NO 950854L
- Authority
- NO
- Norway
- Prior art keywords
- nitrogen oxides
- present
- selective reduction
- catalytic reduction
- selective catalytic
- Prior art date
Links
Classifications
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/76—Iron group metals or copper
- B01J29/7615—Zeolite Beta
-
- 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
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/74—Noble metals
- B01J29/7415—Zeolite Beta
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Abstract
Foreliggende oppfinnelse vedrører en katalysator for selektiv reduksjon av nitrogenoksider og omfatter også av en fremgangsmåte for selektiv reduksjon av nitrogenoksider i avgasser inneholdende oksygen, enten alene eller i kombinasjon med en ikke-katalytisk selektiv reduksjonsprosess. Katalysatoren inneholder en p-zeolitt med et silisiumdioksid til aluminiumoksid forhold på minst 10 og en gjennomsnittlig kinetisk porediameter på minst 5 Ångstrøm. En kobber-promotor er tilstede i en mengde på 0.1-10 vekt% av zeolitten og en palladium- eller rhodium-promotor er tilstede i en mengde på 0.01-1.0 vekt%.The present invention relates to a catalyst for the selective reduction of nitrogen oxides and also comprises a process for the selective reduction of nitrogen oxides in exhaust gases containing oxygen, either alone or in combination with a non-catalytic selective reduction process. The catalyst contains a β-zeolite with a silica to alumina ratio of at least 10 and an average kinetic pore diameter of at least 5 angstroms. A copper promoter is present in an amount of 0.1-10% by weight of the zeolite and a palladium or rhodium promoter is present in an amount of 0.01-1.0% by weight.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO950854A NO950854L (en) | 1995-03-03 | 1995-03-03 | Selective catalytic reduction of nitrogen oxides |
AU49590/96A AU4959096A (en) | 1995-03-03 | 1996-03-01 | Selective catalytic reduction of nitrogen oxides |
PCT/NO1996/000048 WO1996027428A1 (en) | 1995-03-03 | 1996-03-01 | Selective catalytic reduction of nitrogen oxides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO950854A NO950854L (en) | 1995-03-03 | 1995-03-03 | Selective catalytic reduction of nitrogen oxides |
Publications (2)
Publication Number | Publication Date |
---|---|
NO950854D0 NO950854D0 (en) | 1995-03-03 |
NO950854L true NO950854L (en) | 1996-09-04 |
Family
ID=19897985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO950854A NO950854L (en) | 1995-03-03 | 1995-03-03 | Selective catalytic reduction of nitrogen oxides |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU4959096A (en) |
NO (1) | NO950854L (en) |
WO (1) | WO1996027428A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6761868B2 (en) | 2001-05-16 | 2004-07-13 | The Chemithon Corporation | Process for quantitatively converting urea to ammonia on demand |
US6887449B2 (en) | 2002-11-21 | 2005-05-03 | The Chemithon Corporation | Method of quantitatively producing ammonia from urea |
ES2485499T3 (en) | 2010-09-03 | 2014-08-13 | Danmarks Tekniske Universitet | Heteropolyacid-promoted catalyst for NOx RCS with ammonia |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4961917A (en) * | 1989-04-20 | 1990-10-09 | Engelhard Corporation | Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts |
US5329057A (en) * | 1991-04-19 | 1994-07-12 | The Dow Chemical Company | Process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes |
US5316661A (en) * | 1992-07-08 | 1994-05-31 | Mobil Oil Corporation | Processes for converting feedstock organic compounds |
-
1995
- 1995-03-03 NO NO950854A patent/NO950854L/en unknown
-
1996
- 1996-03-01 AU AU49590/96A patent/AU4959096A/en not_active Abandoned
- 1996-03-01 WO PCT/NO1996/000048 patent/WO1996027428A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO1996027428A1 (en) | 1996-09-12 |
AU4959096A (en) | 1996-09-23 |
NO950854D0 (en) | 1995-03-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5149512A (en) | Catalytic reduction of NOx using methane in the presence of oxygen | |
US5260043A (en) | Catalytic reduction of NOx and carbon monoxide using methane in the presence of oxygen | |
CA1107653A (en) | Two-stage catalysis of engine exhaust | |
CA2027638A1 (en) | Catalyst for purifying exhaust gases | |
KR900015816A (en) | A method for reducing nitrogen oxides with ammonia using an accelerated zeolite catalyst | |
CA2131041A1 (en) | Exhaust Emission Control Catalyst | |
KR900015815A (en) | Zeolite Catalyst Promoted by Process Metals and Catalytic Reduction of Nitrogen Oxides Using the Same | |
AU648362B2 (en) | Multi-stage TWC system | |
MX9710017A (en) | Diesel engine exhaust gas catalyst and method of use. | |
MX9301179A (en) | CATALYSTS TO DECREASE THE NOX CONTENT IN POOR EXHAUST GASES FROM AUTOMOBILE ENGINES. | |
BR8906426A (en) | PROCESS FOR REDUCING EXHAUST GAS NITROGEN OXIDES | |
CA2149835A1 (en) | Process for the Purification of Nitric Oxide | |
CA2013869A1 (en) | Method for removing nitrogen oxides from exhaust gases | |
EP0707883B1 (en) | Catalyst and method for purifying exhaust gases | |
KR970703800A (en) | NITROGEN OXIDE-REDUCING CATALYST AND PROCESS FOR REDUCING NITROGEN OXIDES IN EXHAUST GAS | |
EP0692302A3 (en) | Catalyst for purifying exhaust gases and process for purifying exhaust gases | |
CA2288105A1 (en) | Exhaust gas purification method and exhaust gas purification catalyst | |
EP0652040B1 (en) | Process and catalyst for reducing NOx in combustion exhaust gases | |
JPS6260139B2 (en) | ||
NO950854L (en) | Selective catalytic reduction of nitrogen oxides | |
Keiski et al. | NOx abatement in lean exhaust gas conditions over metal substrated zeolite catalysts | |
US5869013A (en) | Process and catalyst for reducing Nox in exhaust combustion gases | |
EP0969914B1 (en) | Emission control system for a lean-burn internal combustion engine | |
HUP9904522A2 (en) | Catalyst, in particular for reducing nox and method for reducing nox | |
JPH04267951A (en) | Catalyst for purifying exhaust gas |