United States Department of Transportation
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Progress in catalytic ignition fabrication and modeling : fabrication part 2.
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2012-06-01
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Abstract:The ignition temperature and heat generation from oxidation of methane on a platinum catalyst were
determined experimentally. A 127 micron diameter platinum coiled wire was placed crosswise in a
quartz tube of a plug flow reactor. A source meter with a 4-wire measurement capability measured the
resistance and current to calculate the average temperature of the surface reaction. Light-off
temperatures varied from 730-780K for methane for a fuel-oxygen equivalence ratio of 0.3 to 1.0 at
fuel percentages of 2-5% by volume. A model of the experimental system was created using Fluent
coupled with Chemkin to combine an advanced chemistry solver with flow simulation. The
experimental data was compared to the model results, which includes heat transfer and the surface
reaction kinetics of methane on platinum. The heat transfer model obtained values close to
experimental data for temperatures between 400K and 700K. At temperatures greater than 700K the
model deviated with temperatures greater than the experimental results.
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