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ES2036473A1 - Catalytic appts. for reducing nitrogen oxide(s) in I.C. engine exhaust - has catalyst bed of different materials active in different temp. ranges of exhaust gas - Google Patents

Catalytic appts. for reducing nitrogen oxide(s) in I.C. engine exhaust - has catalyst bed of different materials active in different temp. ranges of exhaust gas

Info

Publication number
ES2036473A1
ES2036473A1 ES919102221A ES9102221A ES2036473A1 ES 2036473 A1 ES2036473 A1 ES 2036473A1 ES 919102221 A ES919102221 A ES 919102221A ES 9102221 A ES9102221 A ES 9102221A ES 2036473 A1 ES2036473 A1 ES 2036473A1
Authority
ES
Spain
Prior art keywords
exhaust gas
temp
appts
bed
catalytic
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.)
Granted
Application number
ES919102221A
Other languages
Spanish (es)
Other versions
ES2036473B1 (en
Inventor
Kartmut Kainer
Daniel Grimm
Wilfried Schnelle
Wilfried Schutz
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of ES2036473A1 publication Critical patent/ES2036473A1/en
Application granted granted Critical
Publication of ES2036473B1 publication Critical patent/ES2036473B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20723—Vanadium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20738—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20784—Chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Catalytic appts. for reducing nitrogen oxides in an I.C. engine exhaust gas produced in a wide temp. range has at least two catalyst beds (7,8) of different materials arranged in the direction of the exhaust gas stream. The different materials have their strongest catalytic action in different regions of the temp. range of the exhaust gas. Specifically, an ammonia inlet is located in front of the first catalyst bed (7) in the direction of the exhaust gas. Catalyst bed (7), whose optimum activity lies in a higher temp. range, is located in the stream direction before bed (8). The catalyst material for the higher exhaust gas region is based on Fe2(SO4)3 and the catalyst material for the lower region on a mixt. of Ti02 and V205 or Fe203 and Cr203. A soot particle filter (3) with a temp. peak buffer (4) is connected to the bed (7). An oxidn. catalyst bed (9) is located after bed (8). ADVANTAGE - The appts. can be made to suit the characteristics of the exhaust gas stream of engines.
ES9102221A 1990-10-10 1991-10-08 CATALYST PROVISION FOR NITROGEN OXIDE REDUCTION Expired - Lifetime ES2036473B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4032085A DE4032085A1 (en) 1990-10-10 1990-10-10 Catalytic appts. for reducing nitrogen oxide(s) in I.C. engine exhaust - has catalyst bed of different materials active in different temp. ranges of exhaust gas

Publications (2)

Publication Number Publication Date
ES2036473A1 true ES2036473A1 (en) 1993-05-16
ES2036473B1 ES2036473B1 (en) 1994-03-01

Family

ID=6415974

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9102221A Expired - Lifetime ES2036473B1 (en) 1990-10-10 1991-10-08 CATALYST PROVISION FOR NITROGEN OXIDE REDUCTION

Country Status (6)

Country Link
BE (1) BE1006164A3 (en)
CH (1) CH681429A5 (en)
DE (1) DE4032085A1 (en)
DK (1) DK171491A (en)
ES (1) ES2036473B1 (en)
IT (1) IT1249451B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59307293D1 (en) * 1992-02-10 1997-10-16 Man Nutzfahrzeuge Ag Device for the catalytic NOX reduction
CA2088713C (en) * 1992-02-24 1999-11-16 Hans Thomas Hug Cleaning exhaust gases from combustion installations
DE4214183A1 (en) * 1992-04-30 1993-06-09 Daimler Benz Ag Exhaust gas treatment for IC (diesel) engine - has reducing catalyst for nitrogen oxide with ammonia addition, and downstream oxidative catalyst
EP0611594A1 (en) * 1993-02-17 1994-08-24 Siemens Aktiengesellschaft Catalyst for converting reactants in a gas mixture
DE59400100D1 (en) * 1993-03-26 1996-03-14 Siemens Ag Catalyst for nitrogen oxide reduction in the exhaust gas of an internal combustion engine
JPH09500164A (en) * 1993-07-12 1997-01-07 プラチナム プラス インコーポレーテッド Method for reducing NOx and particulate emissions from diesel engines
DE19617563C2 (en) * 1996-05-02 2000-06-15 Daimler Chrysler Ag Catalytic converter system for a diesel engine
US8833062B1 (en) 2013-03-15 2014-09-16 Daimier Ag Catalytic reduction of NOx
GB9802504D0 (en) 1998-02-06 1998-04-01 Johnson Matthey Plc Improvements in emission control
JP3482874B2 (en) * 1998-05-28 2004-01-06 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
JP3733834B2 (en) * 2000-05-02 2006-01-11 日産自動車株式会社 Exhaust gas purification device for internal combustion engine
DE10128414A1 (en) 2001-06-12 2002-12-19 Daimler Chrysler Ag Exhaust gas system for cleaning internal combustion engine exhaust gases comprises a reducing agent supply having a hydrogen-producing unit for enriching the exhaust gas with hydrogen
DE10207986A1 (en) 2002-02-25 2003-09-04 Daimler Chrysler Ag Emission control system for an internal combustion engine
US6846464B2 (en) * 2002-11-20 2005-01-25 Ford Global Technologies, Llc Bimodal catalyst-urea SCR system for enhanced NOx conversion and durability
US7481983B2 (en) 2004-08-23 2009-01-27 Basf Catalysts Llc Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia
FR2877693B1 (en) * 2004-11-08 2007-04-13 Peugeot Citroen Automobiles Sa EXHAUST GAS NOx TREATMENT SYSTEM OF A MOTOR VEHICLE THERMAL MOTOR
US8850802B1 (en) 2013-03-15 2014-10-07 Daimler Ag Catalytic reduction of NOx

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332663A1 (en) * 1983-09-10 1985-04-04 L. & C. Steinmüller GmbH, 5270 Gummersbach Process for optimising the reduction of NOx in flue gases from fossil fuel-fired furnaces
DE3544320A1 (en) * 1985-12-14 1987-08-27 Rennebeck Klaus Cascade sequence catalysation using series connection of catalysts in dependence on the reaction temperature
DE3733501A1 (en) * 1987-10-03 1989-04-13 Ruhrgas Ag Process for reducing emissions in the operation of stationary internal-combustion engines
EP0313434A1 (en) * 1987-10-21 1989-04-26 Societe Francaise Des Produits Pour Catalyse "Pro-Catalyse" - Method for manufacturing a catalyst for the treatment of the exhaust gases of an internal combustion engine.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332788B2 (en) * 1973-10-12 1978-09-09
GB1560184A (en) * 1977-05-31 1980-01-30 Caterpillar Tractor Co Dual catalyst nitric oxide reduction
DE8424417U1 (en) * 1984-08-17 1986-07-10 Lentjes BWE Energietechnik GmbH, 4000 Düsseldorf Device for the selective catalytic reduction of nitrogen oxides
DE3505648C2 (en) * 1985-02-19 1987-02-19 Didier Engineering Gmbh, 4300 Essen Process for the preparation of a catalyst containing iron oxide, chromium oxide and manganese oxide for the selective reduction of nitrogen oxides in exhaust gases by means of ammonia
DE3637395A1 (en) * 1986-11-03 1988-05-05 Thyssen Industrie Apparatus for the dinitration of flue gases

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332663A1 (en) * 1983-09-10 1985-04-04 L. & C. Steinmüller GmbH, 5270 Gummersbach Process for optimising the reduction of NOx in flue gases from fossil fuel-fired furnaces
DE3544320A1 (en) * 1985-12-14 1987-08-27 Rennebeck Klaus Cascade sequence catalysation using series connection of catalysts in dependence on the reaction temperature
DE3733501A1 (en) * 1987-10-03 1989-04-13 Ruhrgas Ag Process for reducing emissions in the operation of stationary internal-combustion engines
EP0313434A1 (en) * 1987-10-21 1989-04-26 Societe Francaise Des Produits Pour Catalyse "Pro-Catalyse" - Method for manufacturing a catalyst for the treatment of the exhaust gases of an internal combustion engine.

Also Published As

Publication number Publication date
ITRM910751A0 (en) 1991-10-07
DK171491A (en) 1992-04-11
DE4032085A1 (en) 1992-04-16
IT1249451B (en) 1995-02-23
ES2036473B1 (en) 1994-03-01
BE1006164A3 (en) 1994-05-31
ITRM910751A1 (en) 1993-04-07
DK171491D0 (en) 1991-10-09
CH681429A5 (en) 1993-03-31

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Date Code Title Description
FA2A Application withdrawn

Effective date: 20050301