Gas phase and catalytic ignition of methane and ethane in air over platinum

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690360607· OSTI ID:5294661

Griffin, T A; Pfefferle, L D ^[1]

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1. Yale Univ., Dept. of Chemical Engineering, New Haven, CT (US)

The ignition of gas phase combustion by heated catalytically active surface involves dynamic coupling of transport processes and chemical kinetics. Researchers have observed that surfaces with high catalytic activity require higher surface temperatures to ignite gas phase combustion, compared to nonactive surfaces, and that this difference is greatest for a stoichiometric mixture. In this paper an analysis of the ignition of surface-catalyzed oxidation is developed along with an experimental technique for independently monitoring both surface and gas phase ignition such that the dynamics of these two events can be decoupled. Experiments suggest that the sharp maximum in surface temperature required for gas phase ignition observed in previous work is an artifact caused by transient heating of the surface as ignition occurs. Analysis of surface ignition was also used to investigate the kinetics of methane and ethane oxidation on platinum.

• OSTI ID: 5294661
• Journal Information: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States), Journal Name: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States) Vol. 36:6; ISSN AICEA; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
09 BIOMASS FUELS
092000 -- Biomass Fuels-- Combustion-- (1990-)
AIR
ALKANES
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COMBUSTION PROPERTIES
ELEMENTS
ETHANE
FLUIDS
GASES
HYDROCARBONS
IGNITION
METALS
METHANE
ORGANIC COMPOUNDS
OXIDATION
PLATINUM
PLATINUM METALS
TRANSITION ELEMENTS