Methane and Nitric Oxide Conversion Over a Catalyst Dedicated for Natural Gas Vehicles Competence Center for Catalysis, Chalmers University of Technology

Format:

Conference/Event

Author/Creator:

Andersson, Bengt, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (2000-10-16 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

Methane and nitric oxide conversion was studied over a Pd-based catalyst at steady state conditions. The gas mixture contained methane (0.125 %), Nitric oxide (0.125 %), carbon monoxide (0.7 %), oxygen and argon as carrier gas. The experiments were performed in a well-stirred reactor (Berty reactor) which provided constant gas composition over the catalyst. Lambda scans from λ=1.01 to 0.99 and back performed by varying the oxygen content, revealed a hysteresis in both the methane conversion and the nitric oxide conversion. The temperature and presence of nitric oxide affected the hysteresis.Complementary experiments in a synthetic exhaust gas rig revealed a more pronounced hysteresis in the presence of carbon dioxide and water.An attempt to model the hysteresis effect as a function of the palladium and palladium-oxide transformations was made.The effects are expected to have a strong influence on the light-off and low temperature performance on the emission control from natural gas fuelled vehicles

Notes:

Vendor supplied data

Publisher Number:

2000-01-2928

Access Restriction:

Restricted for use by site license