GB1356664A - Control of air-fuel ratio to prevent ammonia formation in auto motive exhaust - Google Patents

Control of air-fuel ratio to prevent ammonia formation in auto motive exhaust

Info

Publication number
GB1356664A
GB1356664A GB3958271A GB3958271A GB1356664A GB 1356664 A GB1356664 A GB 1356664A GB 3958271 A GB3958271 A GB 3958271A GB 3958271 A GB3958271 A GB 3958271A GB 1356664 A GB1356664 A GB 1356664A
Authority
GB
United Kingdom
Prior art keywords
air
reaction stage
gas
catalyst
power plant
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.)
Expired
Application number
GB3958271A
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering Co
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 Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of GB1356664A publication Critical patent/GB1356664A/en
Expired 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
    • B01D53/9459—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
    • 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
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • 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
    • B01D2255/20753—Nickel
    • 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
    • B01D2255/20761—Copper

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Catalysts (AREA)

Abstract

1356664 Purifying exhaust gases ESSO RESEARCH & ENG CO 24 Aug 1971 [16 Sept 1970] 39582/71 Headings F1B and FIT Hydrocarbon fuel is burnt in an automotive power plant with an amount of air to yield an exhaust gas having an oxygen content of 25-95% of the stoichiometric equivalent of the reducing gas present, the exhaust gas being contacted in a first reaction stage, without additional air, with a catalyst to reduce NO and then having air added to oxidize the reducing gas in a second reaction stage. Preferably the oxygen content of the power plant exhaust gas is from 30% to 70% of stoichiometric. The catalyst in the first reaction stage may be one or more noble metals (e.g. ruthenium and platinum) or may be nickel or a nickel-copper alloy. The second reaction stage may contain a catalyst or may be a thermal reactor. The automotive power plant may be an I.C. engine or a turbine. The hydrocarbon fuel may be gasoline, kerosene, diesel oil, natural gas or liquefied petroleum gas.
GB3958271A 1970-09-16 1971-08-24 Control of air-fuel ratio to prevent ammonia formation in auto motive exhaust Expired GB1356664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7287770A 1970-09-16 1970-09-16

Publications (1)

Publication Number Publication Date
GB1356664A true GB1356664A (en) 1974-06-12

Family

ID=22110281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3958271A Expired GB1356664A (en) 1970-09-16 1971-08-24 Control of air-fuel ratio to prevent ammonia formation in auto motive exhaust

Country Status (1)

Country Link
GB (1) GB1356664A (en)

Similar Documents

Publication Publication Date Title
KR880012864A (en) Automobile exhaust gas treatment catalyst and treatment method
UA26415C2 (en) METHOD OF NON-OXIDATION OF HYDROCARBON FUEL
GB1262318A (en) Catalytic conversion of exhaust gas impurities
CA2160494A1 (en) A process for simultaneously reducing the amounts of hydrocarbons, carbon monoxide and nitrogen oxides contained in the exhaust gas from an internal combustion engine
CA2037690A1 (en) Method for reducing methane exhaust emissions from natural gas fueled engines
KR950002348B1 (en) Method and composition for providing an improved combustion in process of combustion containing hydrocarbon compounds
GB1460222A (en) Catalysts for purifying exhaust gases
GB1422284A (en) Combination of a silencer and a cracking carburettor for an internal combustion engine
GB1467084A (en) Catalyst and its use in hydrocarbon cracking processes
GB1356664A (en) Control of air-fuel ratio to prevent ammonia formation in auto motive exhaust
US3674423A (en) Catalyst for nitrogen oxide reduction
GB1503377A (en) Catalytic purification of internal combustion engine exhaust gases
Tesarek Investigations concerning the employment possibilities of the diesel-gas process for reducing exhaust emissions, especially soot (Particulate Matters)
JP2798219B2 (en) Denitration equipment for internal combustion engines
GB1361521A (en) Process of operating an internal combustion engine
FR2146433A1 (en) Power prodn from fuels - contg carbon, by adiabatic oxidn in combined catalytic and thermal processes
GB1391509A (en) Method for decreasing nitrogen oxides in exhaust gases
CA1331917C (en) Method and a composition for providing an improved combustion in process of combustion containing hydrocarbon compounds
JPS52124522A (en) Gasoline internal combustion engine
ATE182124T1 (en) DIRECT CONVERSION FROM METHANE TO HUTHANE
GB1425481A (en) Process for reducing nitrogen oxide emission from automobile exhausts
FR2098727A5 (en) Catalytic conversion of exhaust gases - from ic engines
JPS5365285A (en) Exhaust gas purification catalyst for internal combustion engine
Albert et al. Design, Fabrication and Testing of a MnO2 based Catalytic Converter
JPH05202373A (en) Low-pollution fuel composition

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees