WO2007090977A3 - Method for desulfation of a catalyst - Google Patents

Method for desulfation of a catalyst Download PDF

Info

Publication number
WO2007090977A3
WO2007090977A3 PCT/FR2007/050729 FR2007050729W WO2007090977A3 WO 2007090977 A3 WO2007090977 A3 WO 2007090977A3 FR 2007050729 W FR2007050729 W FR 2007050729W WO 2007090977 A3 WO2007090977 A3 WO 2007090977A3
Authority
WO
WIPO (PCT)
Prior art keywords
desulfation
catalyst
richness
during
mixture composition
Prior art date
Application number
PCT/FR2007/050729
Other languages
French (fr)
Other versions
WO2007090977A2 (en
Inventor
Jean Christophe Beziat
Alain Girodon
Pascal Barrillon
Najat Moral
Original Assignee
Renault Sa
Jean Christophe Beziat
Alain Girodon
Pascal Barrillon
Najat Moral
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 Renault Sa, Jean Christophe Beziat, Alain Girodon, Pascal Barrillon, Najat Moral filed Critical Renault Sa
Priority to EP07731557A priority Critical patent/EP1979587A2/en
Publication of WO2007090977A2 publication Critical patent/WO2007090977A2/en
Publication of WO2007090977A3 publication Critical patent/WO2007090977A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
    • 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
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • 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
    • B01D53/96—Regeneration, reactivation or recycling of reactants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • F02D41/028—Desulfurisation of NOx traps or adsorbent
    • 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
    • B01D2257/302—Sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/24—Hydrogen sulfide (H2S)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The invention concerns a method for desulfation of an internal combustion engine exhaust gas purifying catalyst comprising a nitrogen oxide accumulating component capable of being loaded with sulfates, the catalyst being heated to a minimum regenerating temperature and the gas mixture composition, at the exhaust being set, during a desulfation phase at a richness greater than 1. According to the invention, during each desulfation phase, the mixture composition is accurately adjusted to a richness very slightly greater than 1, preferably of the order of 1.01, so as to avoid or, at least reduce, the emission of foul-smelling sulfurated species.
PCT/FR2007/050729 2006-02-01 2007-02-01 Method for desulfation of a catalyst WO2007090977A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07731557A EP1979587A2 (en) 2006-02-01 2007-02-01 Method for desulfation of a catalyst

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0600941 2006-02-01
FR0600941A FR2896704B1 (en) 2006-02-01 2006-02-01 PROCESS FOR DESULFATATION OF A CATALYST

Publications (2)

Publication Number Publication Date
WO2007090977A2 WO2007090977A2 (en) 2007-08-16
WO2007090977A3 true WO2007090977A3 (en) 2007-11-15

Family

ID=37037464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2007/050729 WO2007090977A2 (en) 2006-02-01 2007-02-01 Method for desulfation of a catalyst

Country Status (3)

Country Link
EP (1) EP1979587A2 (en)
FR (1) FR2896704B1 (en)
WO (1) WO2007090977A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2495751A (en) * 2011-10-20 2013-04-24 Gm Global Tech Operations Inc Operating a DeSOx regeneration event in a Lean NOx Trap of an Internal Combustion Engine Exhaust

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053885A1 (en) * 2001-01-03 2002-07-11 Johnson Matthey Public Limited Company Desulfating a nox-trap in a diesel exhaust system
DE10153901A1 (en) * 2001-10-12 2003-04-24 Volkswagen Ag Process for desulfurizing NOx accumulation catalyst placed downstream of diesel engine by altering amount of fuel injected into working cycle of cylinder(s) of engine
FR2859498A1 (en) * 2003-09-09 2005-03-11 Peugeot Citroen Automobiles Sa Catalytic converter for trapping nitrogen oxides in set of cells with walls coated in material which traps NOx and where each cell has a polygonal section with more than four angles or a circular section

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053885A1 (en) * 2001-01-03 2002-07-11 Johnson Matthey Public Limited Company Desulfating a nox-trap in a diesel exhaust system
DE10153901A1 (en) * 2001-10-12 2003-04-24 Volkswagen Ag Process for desulfurizing NOx accumulation catalyst placed downstream of diesel engine by altering amount of fuel injected into working cycle of cylinder(s) of engine
FR2859498A1 (en) * 2003-09-09 2005-03-11 Peugeot Citroen Automobiles Sa Catalytic converter for trapping nitrogen oxides in set of cells with walls coated in material which traps NOx and where each cell has a polygonal section with more than four angles or a circular section

Also Published As

Publication number Publication date
EP1979587A2 (en) 2008-10-15
WO2007090977A2 (en) 2007-08-16
FR2896704B1 (en) 2008-03-21
FR2896704A1 (en) 2007-08-03

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