Measuring Ignition Temperatures of Methane in Oxygen-Nitrogen Mixtures on Platinum

摘要

The ignition temperature and heat generation from oxidation of methane on a platinum catalyst were determined. 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. Ignition 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. These results will aid in understanding the heat transfer processes of catalytic igniters in fuel-lean mixtures and in validating the modeling of surface reactions for methane.