Removal of methane from compressed natural gas fueled vehicle exhaust

Journal Article · Sun Nov 01 00:00:00 EST 1992 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00011a009· OSTI ID:6800275

Subramanian, S; Kudla, R J; Chattha, M S ^[1]

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1. Ford Motor Co., Dearborn, MI (United States)

The objective of this paper is to investigate the modes of methane (CH[sub 4]) removal from simulated compressed natural gas (CNG) fueled vehicle exhaust under net oxidizing, net reducing, and stoichiometric conditions. Model reaction studies were conducted. The results suggest that the oxidation of methane with oxygen contributes to the removal of methane under net oxidizing conditions. In contrast, the oxidation of methane with oxygen as well as nitric oxide contributes to its removal under net reducing conditions. The steam reforming reaction does not significantly contribute to the removal of methane. The methane conversions under net reducing conditions are higher than those observed under net oxidizing conditions. The study shows that the presence of carbon monoxide in the feed gas leads to a gradual decrease in the methane conversion with increasing redox ratio, under net oxidizing conditions. a minimum in methane conversion is observed at a redox ratio of 0. 8. The higher activity for the methane-oxygen reaction resulting from a lowering in the overall oxidation state of palladium and the contribution of the methane-nitric oxide reaction toward the removal of CH[sub 4] appear to account for the higher CH[sub 4] conversions observed under net reducing conditions.

• OSTI ID: 6800275
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 31:11; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
03 NATURAL GAS
EXHAUST SYSTEMS
AIR POLLUTION CONTROL
METHANE
OXIDATION
NATURAL GAS
COMBUSTION
VEHICLES
GASEOUS WASTES
CARBON MONOXIDE
CHEMICAL REACTION KINETICS
FUEL SUBSTITUTION
NITRIC ACID
OXYGEN
SIMULATION
STOICHIOMETRY
WASTE MANAGEMENT
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MANAGEMENT
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REACTION KINETICS
THERMOCHEMICAL PROCESSES
WASTES
330700* - Advanced Propulsion Systems- Emission Control
030800 - Natural Gas- Environmental Aspects
034000 - Natural Gas- Combustion
030700 - Natural Gas- Waste Management