FR2261810A1 - Mixed oxide catalyst for nitrogen oxides sepn from flue gas - by calcining a dispersion of rare-earth oxides in aluminium oxides - Google Patents

Mixed oxide catalyst for nitrogen oxides sepn from flue gas - by calcining a dispersion of rare-earth oxides in aluminium oxides

Info

Publication number
FR2261810A1
FR2261810A1 FR7501595A FR7501595A FR2261810A1 FR 2261810 A1 FR2261810 A1 FR 2261810A1 FR 7501595 A FR7501595 A FR 7501595A FR 7501595 A FR7501595 A FR 7501595A FR 2261810 A1 FR2261810 A1 FR 2261810A1
Authority
FR
France
Prior art keywords
oxides
calcining
dispersion
mixed oxide
rare
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Withdrawn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
FR7501595A
Other languages
French (fr)
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Priority claimed from JP49021464A external-priority patent/JPS50115687A/ja
Priority claimed from JP49086089A external-priority patent/JPS5114890A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2261810A1 publication Critical patent/FR2261810A1/en
Withdrawn legal-status Critical Current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
    • B01D53/74—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
    • 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
    • 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
    • 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)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

Catalyst for reducing nitrogen oxides from the gases at 250-500, pref. 300-400 degrees C, is obtd. by dispersing 1 to 40 pts. wt. of a mixed oxide of rare earth and other metals in 100 pts. wt. of Al2O3, moulding the dispersion and calcining it at 600-940, pref. 750-940 degrees C. Catalyst is highly active and is not deactivated by S oxides, O2 or high temps. It has a long life and is unaffected by intermittent use, resisting acid solns. as found in boiler flue gases. Support has good compressive strength.
FR7501595A 1974-02-25 1975-01-20 Mixed oxide catalyst for nitrogen oxides sepn from flue gas - by calcining a dispersion of rare-earth oxides in aluminium oxides Withdrawn FR2261810A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP49021464A JPS50115687A (en) 1974-02-25 1974-02-25
JP49086089A JPS5114890A (en) 1974-07-29 1974-07-29

Publications (1)

Publication Number Publication Date
FR2261810A1 true FR2261810A1 (en) 1975-09-19

Family

ID=26358526

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7501595A Withdrawn FR2261810A1 (en) 1974-02-25 1975-01-20 Mixed oxide catalyst for nitrogen oxides sepn from flue gas - by calcining a dispersion of rare-earth oxides in aluminium oxides

Country Status (2)

Country Link
DE (1) DE2501810A1 (en)
FR (1) FR2261810A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519120A1 (en) * 1991-06-18 1992-12-23 N.E. Chemcat Corporation Catalyst for purification of exhaust gases
EP0888816A1 (en) * 1996-12-26 1999-01-07 ICT Co., Ltd. Exhaust gas purification catalyst and waste gas purification method
US6287527B1 (en) 1996-12-26 2001-09-11 Ict Co., Ltd. Method for controlling exhaust emission

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720296B1 (en) * 1994-05-27 1996-07-12 Rhone Poulenc Chimie Compounds based on alumina, cerium oxide and zirconium oxide with high reducibility, process for their preparation and their use in the preparation of catalysts.
DE19751962A1 (en) * 1997-11-24 1999-07-29 Wacker Chemie Gmbh Supported catalyst, process for its preparation and use in the oxychlorination of ethylene
CN108465471A (en) * 2018-04-20 2018-08-31 安徽工业大学 The production system and method for the cerium base catalyst of a kind of cooperation-removal bioxin and nitrogen oxides

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519120A1 (en) * 1991-06-18 1992-12-23 N.E. Chemcat Corporation Catalyst for purification of exhaust gases
US5306684A (en) * 1991-06-18 1994-04-26 N. E. Chemcat Corporation Catalyst for purification of exhaust gases
EP0888816A1 (en) * 1996-12-26 1999-01-07 ICT Co., Ltd. Exhaust gas purification catalyst and waste gas purification method
US6287527B1 (en) 1996-12-26 2001-09-11 Ict Co., Ltd. Method for controlling exhaust emission
EP0888816B1 (en) * 1996-12-26 2003-05-14 ICT Co., Ltd. Exhaust gas purification catalyst and waste gas purification method

Also Published As

Publication number Publication date
DE2501810A1 (en) 1975-08-28

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Legal Events

Date Code Title Description
ST Notification of lapse