EP0711198A1 - Catalyseur en un metal commun et procede de purification en deux etapes des gaz d'echappement de vehicules - Google Patents

Catalyseur en un metal commun et procede de purification en deux etapes des gaz d'echappement de vehicules

Info

Publication number
EP0711198A1
EP0711198A1 EP94921750A EP94921750A EP0711198A1 EP 0711198 A1 EP0711198 A1 EP 0711198A1 EP 94921750 A EP94921750 A EP 94921750A EP 94921750 A EP94921750 A EP 94921750A EP 0711198 A1 EP0711198 A1 EP 0711198A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
oxides
support
oxide
mixed
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.)
Withdrawn
Application number
EP94921750A
Other languages
German (de)
English (en)
Inventor
Ashok Kumar Bhattacharya
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.)
MG Rover Group Ltd
Original Assignee
MG Rover Group Ltd
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 MG Rover Group Ltd filed Critical MG Rover Group Ltd
Publication of EP0711198A1 publication Critical patent/EP0711198A1/fr
Withdrawn legal-status Critical Current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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • 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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • 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
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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

Definitions

  • This invention relates to a catalyst for treating gases, and in particular to a catalyst for treating waste gases which are the products of combustion, such as motor vehicle exhaust gases.
  • One common solution is to pass the exhaust gases through a catalyst bed intended to promote the conversion of pollutants to less harmful substances before the exhaust gases are discharged into the atmosphere.
  • the catalytic component of such exhaust gas catalysts that are used at present consists of platinum in association with other platinum group metals. Platinum group metals are in short supply and their price is already high, and there are fears that the increasingly-widespread use of exhaust gas catalysts as a result of anti-pollution legislation will cause the cost of platinum group metals to rise still further until the cost of the exhaust gas catalyst becomes a significant proportion of the overall cost of the motor vehicle.
  • One objective of this invention is therefore to provide an effective exhaust gas catalyst that does not rely on a scarce and expensive material such as platinum or other platinum-group metal.
  • base metal catalytic systems have been found to exhibit varied resistance to sulphur poisoning and have specific activities lower than those of platinum-group metal systems.
  • the present invention overcomes the above problems.
  • a catalyst comprising: A. a copper component as defined herein dispersed on B. a mixed support containing
  • copper component we mean a mixture containing A(i) cuprous oxide and cupric oxide either on their own or mixed with metallic copper or A(i) and A(ii) one or more oxides of transition metals, preferably selected from cobalt, manganese, nickel and iron.
  • the lanthanide oxide component B(i) is selected from oxides of cerium,
  • component B(i) is cerium dioxide either on its own or mixed with one or more other lanthanide oxides.
  • Group II component B(ii) is selected from one or more oxides of magnesium, calcium, strontium and barium.
  • Group IV component B(iv) is selected from oxides of one or more of zirconium, titanium and Hafnium.
  • the Group IIlb component B(iii) is preferably alumina ( I2O3).
  • the components of the mixed support B may each be present in an amount of from 0.005 to 99.0 per cent by weight based on the total weight (W) of the support, with the total amount of components B(i) to B(iv) always adding up to 100 wt %.
  • a solid solution comprising two or more of zirconium oxide (Zr ⁇ 2) preferably present in an amount of from 3 to 15% and more preferably 7%, tungsten oxide (WO3) molybdenum oxide (M0O3) , alumina (AI2O3); optionally carried on a high surface area support such as alumina ( Alp- ⁇ - ) , preferably stabilized with magnesium oxide; or
  • the first catalyst may comprise (ii) cuprous oxide and cupric oxide and optionally metallic copper on the mixed support B in combination with a second catalyst comprising a platinum group metal dispersed on the mixed support B.
  • the platinum group metal comprises palladium and a mixture of metallic palladium and palladium oxide is particularly preferred.
  • the invention provides the mixed oxide support B for a base metal or platinum- group metal catalyst used in the purification of exhaust gases.
  • Figs. 1a and 1b show results obtained with a base metal catalyst outside the scope of the invention comprising copper oxide supported on ⁇ -
  • Requisite quantities of nitrate were added to 400 ml of distilled water and heated to 60°C. To this solution, about 35 ml of (1:1) NH ⁇ OH was added quickly with stirring. Final pH was 9. The slurry was digested at 70°-80°C for 4 hours, filtered, washed 4 times, each with 200 ml of cold water, dried overnight at 110°C and powdered.
  • the catalyst of the invention is able to achieve over 90% conversion of NO at 525°C.
  • Fig. 3 shows the catalytic conversion of a synthetic exhaust gas composition at a space velocity of 15000 hr GHSV in a two-stage process of the invention in which the catalyst in the first stage comprises the catalyst of Fig. 2 and the catalyst in the second stage comprises the copper component of the catalyst of Fig. 2 dispersed on a zeolite support.
  • the two-stage process of the invention it is possible to obtain 100% NO conversion at a temperature of 225°C.
  • Fig. 4 shows the catalytic conversion of a synthetic exhaust gas composition at a space velocity -1 of 5000 hr GHSV of a synthetic exhaust gas composition in a two-stage process of the invention in which the catalyst in the first stage comprises the catalyst of Fig. 2 and the catalyst in the second stage comprises the mixed oxide support B of the catalyst of Fig. 2 having palladium dispersed thereon and an amount of 1% weight based on the total weight of th support.
  • the catalyst in the first stage comprises the catalyst of Fig. 2
  • the catalyst in the second stage comprises the mixed oxide support B of the catalyst of Fig. 2 having palladium dispersed thereon and an amount of 1% weight based on the total weight of th support.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (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)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un catalyseur pour traiter les gaz d'échappement de véhicules comprenant: (A) un composant à base de cuivre, contenant de l'oxyde cuivreux et de l'oxyde cuivrique dispersés sur, (B) un support mixte contenant (i) un ou plusieurs oxydes de lanthanides; (ii) un ou plusieurs oxydes d'éléments du groupe II; (iii) un ou plusieurs oxydes d'éléments du groupe IIIb; et (iv) un ou plusieurs oxydes d'éléments du groupe IV du système de Mendeléeff.
EP94921750A 1993-07-29 1994-07-28 Catalyseur en un metal commun et procede de purification en deux etapes des gaz d'echappement de vehicules Withdrawn EP0711198A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9315679 1993-07-29
GB939315679A GB9315679D0 (en) 1993-07-29 1993-07-29 Base metal catalyst,catalytic support and two-stage process for the purification of vehicle exhaust gases
PCT/GB1994/001635 WO1995003877A1 (fr) 1993-07-29 1994-07-28 Catalyseur en un metal commun, support pour ce catalyseur et procede de purification en deux etapes des gaz d'echappement de vehicules

Publications (1)

Publication Number Publication Date
EP0711198A1 true EP0711198A1 (fr) 1996-05-15

Family

ID=10739618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94921750A Withdrawn EP0711198A1 (fr) 1993-07-29 1994-07-28 Catalyseur en un metal commun et procede de purification en deux etapes des gaz d'echappement de vehicules

Country Status (4)

Country Link
EP (1) EP0711198A1 (fr)
JP (1) JPH09501348A (fr)
GB (2) GB9315679D0 (fr)
WO (1) WO1995003877A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4045002B2 (ja) * 1998-02-02 2008-02-13 三井金属鉱業株式会社 複合酸化物及びそれを用いた排ガス浄化用触媒
DE10252103A1 (de) * 2002-11-08 2004-05-27 Süd-Chemie AG Ce/Cu/Mn-Katalysatoren
DE102007037796A1 (de) * 2007-08-10 2009-02-12 Süd-Chemie AG Verfahren zur Entfernung von CO, H2 und/oder CH4 aus dem Anodenabgas einer Brennstoffzelle mit Mischoxidkatalysatoren umfassend Cu, Mn und gegebenenfalls mindestens ein Seltenerdmetall
JP2012066166A (ja) * 2010-09-21 2012-04-05 Denso Corp 排気浄化用触媒
JP5567999B2 (ja) * 2010-12-10 2014-08-06 トヨタ自動車株式会社 ベースメタル系排ガス浄化触媒
JP5715518B2 (ja) * 2011-07-25 2015-05-07 ダイハツ工業株式会社 排ガス浄化用触媒
US8765085B2 (en) 2012-04-26 2014-07-01 Basf Corporation Base metal catalyst and method of using same
US8668890B2 (en) 2012-04-26 2014-03-11 Basf Corporation Base metal catalyst composition and methods of treating exhaust from a motorcycle
US11179703B2 (en) 2018-02-23 2021-11-23 Lg Chem. Ltd. Catalyst for processing oxychlorination of hydrocarbon, preparation method therefor, and preparation method of oxychlorinated compound of hydrocarbon using same
CN111151262B (zh) * 2020-01-14 2022-11-04 西安理工大学 一种Mn-Cu2O改性光催化剂及其制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS521396B2 (fr) * 1972-08-25 1977-01-13
GB8824543D0 (en) * 1988-10-20 1988-11-23 Austin Rover Group Catalyst
CA2024154C (fr) * 1989-08-31 1995-02-14 Senshi Kasahara Catalyseur pour la reduction des oxydes d'azote dans le gaz d'echappement
GB9020568D0 (en) * 1990-09-20 1990-10-31 Rover Group Supported palladium catalysts
CN1060793A (zh) * 1990-10-22 1992-05-06 华东化工学院 非贵金属三效催化剂
EP0513469A1 (fr) * 1991-05-13 1992-11-19 Imcs Ab Catalyseur contenant des terres rares et support
JP3086015B2 (ja) * 1991-08-07 2000-09-11 トヨタ自動車株式会社 排気ガス浄化用触媒
US5185305A (en) * 1991-11-08 1993-02-09 Ford Motor Company Catalyst system for treating the exhaust from a lean-burn gasoline-fueled engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9503877A1 *

Also Published As

Publication number Publication date
GB9600502D0 (en) 1996-03-27
JPH09501348A (ja) 1997-02-10
GB9315679D0 (en) 1993-09-15
WO1995003877A1 (fr) 1995-02-09
GB2295780A (en) 1996-06-12

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