IT1249451B - Disposizione di catalizzatori per la riduzione di ossidi di azoto. - Google Patents

Disposizione di catalizzatori per la riduzione di ossidi di azoto.

Info

Publication number
IT1249451B
IT1249451B ITRM910751A ITRM910751A IT1249451B IT 1249451 B IT1249451 B IT 1249451B IT RM910751 A ITRM910751 A IT RM910751A IT RM910751 A ITRM910751 A IT RM910751A IT 1249451 B IT1249451 B IT 1249451B
Authority
IT
Italy
Prior art keywords
temperature range
nitrogen oxides
catalysts
reduction
arrangement
Prior art date
Application number
ITRM910751A
Other languages
English (en)
Inventor
Daniel Grimm
Hartmut Kainer
Wilfried Schnelle
Wilfried Schutz
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 ITRM910751A0 publication Critical patent/ITRM910751A0/it
Publication of ITRM910751A1 publication Critical patent/ITRM910751A1/it
Application granted granted Critical
Publication of IT1249451B publication Critical patent/IT1249451B/it

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

In una disposizione di catalizzatori per la riduzione di ossidi di azoto in un gas combusto, questo si presenta in un ampio intervallo di temperatura. Per realizzare in questo intervallo di temperatura una sufficiente prestazione di rimozione dell'azoto e una adattabilità al relativo intervallo di temperatura, sono predisposti nel senso di flusso del gas combusto almeno due letti di catalizzatore (7, 8) l'uno dietro all'altro, costituiti da materiali di catalizzatore differenti per ridurre gli ossidi di azoto. I differenti materiali del catalizzatore presentano il loro massimo effetto catalitico in differenti ambiti parziali adiacenti dell'intervallo di temperatura del gas combusto.
ITRM910751A 1990-10-10 1991-10-07 Disposizione di catalizzatori per la riduzione di ossidi di azoto. IT1249451B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4032085A DE4032085A1 (de) 1990-10-10 1990-10-10 Katalysatoranordnung zur reduktion von stickoxiden

Publications (3)

Publication Number Publication Date
ITRM910751A0 ITRM910751A0 (it) 1991-10-07
ITRM910751A1 ITRM910751A1 (it) 1993-04-07
IT1249451B true IT1249451B (it) 1995-02-23

Family

ID=6415974

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM910751A IT1249451B (it) 1990-10-10 1991-10-07 Disposizione di catalizzatori per la riduzione di ossidi di azoto.

Country Status (6)

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

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59307293D1 (de) * 1992-02-10 1997-10-16 Man Nutzfahrzeuge Ag Vorrichtung zur katalytischen NOX-Reduktion
CA2088713C (en) * 1992-02-24 1999-11-16 Hans Thomas Hug Cleaning exhaust gases from combustion installations
DE4214183A1 (de) * 1992-04-30 1993-06-09 Daimler Benz Ag Abgasnachbehandlungseinrichtung fuer verbrennungsmotoren, mit einem reduktionskatalysator zur selektiven katalytischen reduktion von stickoxiden aus abgasen, insbesondere aus abgasen von kraftfahrzeugdieselmotoren
EP0611594A1 (de) * 1993-02-17 1994-08-24 Siemens Aktiengesellschaft Katalysator zur Umsetzung von Reaktanten eines Gasgemisches
ATE133752T1 (de) * 1993-03-26 1996-02-15 Siemens Ag Katalysator zur stickoxidminderung im abgas eines verbrennungsmotors
DE69425972T2 (de) * 1993-07-12 2001-05-23 Clean Diesel Technologies Inc., Stamford Methode zum herabsetzen von nox-emissionen und von teilchen aus einem dieselmotor
DE19617563C2 (de) * 1996-05-02 2000-06-15 Daimler Chrysler Ag Abgaskatalysatoranlage für einen Dieselmotor
GB9802504D0 (en) * 1998-02-06 1998-04-01 Johnson Matthey Plc Improvements in emission control
US8833062B1 (en) 2013-03-15 2014-09-16 Daimier Ag Catalytic reduction of NOx
JP3482874B2 (ja) * 1998-05-28 2004-01-06 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP3733834B2 (ja) * 2000-05-02 2006-01-11 日産自動車株式会社 内燃機関の排気浄化装置
DE10128414A1 (de) 2001-06-12 2002-12-19 Daimler Chrysler Ag Abgasreinigungsanlage mit Reduktionsmittelversorgung
DE10207986A1 (de) 2002-02-25 2003-09-04 Daimler Chrysler Ag Abgasreinigungsanlage für eine Brennkraftmaschine
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 (fr) * 2004-11-08 2007-04-13 Peugeot Citroen Automobiles Sa SYSTEME DE TRAITEMENT DES NOx DE GAZ D'ECHAPPEMENT D'UN MOTEUR THERMIQUE DE VEHICULE AUTOMOBILE
US8850802B1 (en) 2013-03-15 2014-10-07 Daimler Ag Catalytic reduction of NOx

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332788B2 (it) * 1973-10-12 1978-09-09
GB1560184A (en) * 1977-05-31 1980-01-30 Caterpillar Tractor Co Dual catalyst nitric oxide reduction
DE3332663C2 (de) * 1983-09-10 1987-02-19 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Optimierung der Reduktion von NO↓x↓ in Rauchgasen aus mit fossilen Brennstoffen befeuerten Feuerungseinrichtungen
DE8424417U1 (de) * 1984-08-17 1986-07-10 Lentjes BWE Energietechnik GmbH, 4000 Düsseldorf Vorrichtung zur selektiven katalytischen Reduktion von Stickoxyden
DE3505648C2 (de) * 1985-02-19 1987-02-19 Didier Engineering Gmbh, 4300 Essen Verfahren zur Herstellung eines Eisenoxid, Chromoxid und Manganoxid enthaltenden Katalysators zur selektiven Reduzierung von Stickoxiden in Abgasen mittels Ammoniak
DE3544320A1 (de) * 1985-12-14 1987-08-27 Rennebeck Klaus Kaskaden-sequenzkatalysation mit katalysator-serienschaltung in abhaengigkeit zur reaktionstemperatur
DE3637395A1 (de) * 1986-11-03 1988-05-05 Thyssen Industrie Vorrichtung zur entstickung von rauchgasen
DE3733501A1 (de) * 1987-10-03 1989-04-13 Ruhrgas Ag Verfahren zur verminderung von emissionen beim betrieb von stationaeren verbrennungsmotoren
FR2622126B1 (fr) * 1987-10-21 1991-06-14 Procatalyse Ste Fse Produits C Catalyseur pour le traitement des gaz d'echappement des moteurs a combustion interne et procede de fabrication de ce catalyseur

Also Published As

Publication number Publication date
DE4032085A1 (de) 1992-04-16
ES2036473A1 (es) 1993-05-16
ITRM910751A1 (it) 1993-04-07
CH681429A5 (it) 1993-03-31
ES2036473B1 (es) 1994-03-01
DK171491A (da) 1992-04-11
ITRM910751A0 (it) 1991-10-07
DK171491D0 (da) 1991-10-09
BE1006164A3 (fr) 1994-05-31

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Legal Events

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