Method for reducing methane exhaust emissions from natural gas f

Details Method for reducing methane exhaust emissions from natural gas f Method for reducing methane exhaust emissions from natural gas f

1990-07-23

1992-07-21

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

4232135, F01N 320

Patent

active

051312247

ABSTRACT:
High conversion efficiencies for methane, other unburned hydrocarbons, carbon monoxide and nitrogen oxides can be obtained from a natural gas or methane fueled engine by operating the engine with an air-fuel ratio within a range that includes the stoichiometric air-fuel ratio and extends to the fuel-rich side and by employing in combination with the engine a platinum or platinum and palladium noble metal catalyst for treatment of the engine exhaust gases.

REFERENCES:
patent: 2330664 (1943-09-01), Bennett
patent: 3000707 (1961-09-01), Barstow
patent: 3464801 (1969-09-01), Barstow
patent: 3807173 (1974-04-01), Zmuda
patent: 3935705 (1976-02-01), Hergoualch
patent: 4274373 (1981-06-01), Sugasawa
Robert Bosch GmbH, "Kraftfahr Technisches Taschenbuch", Jan. 1976, VDI-Verlay, Dusseldorf, p. 275.
Klimstra, "Catalytic Converters for Natural Gas Fueled Engines--A Measurement and Control Problem", SAE Paper 872165, 1987.
Section entitled "Task 2.2 Low HC Catalyst", pp. 29-31, taken from Natural Gas Engine Technology, Report GETA 90-01, given in looseleaf form to members of the Gas Engine Technical Advisory Council at their first meeting, May 16, 1990.
Engh et al., "Development of the Volve Lambda-Sond System", SAE Paper 77-295, 1978.
Mooney et al., "Three-Way Conversion Catalyst--Part of the New Emission Control System", SAE Paper 770365, 1978.

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