Absolute HCO concentration measurements for validation of methane combustion mechanisms under fuel-rich conditions

摘要: Most of the mechanisms of methane oxidation were developed for high temperature, near stoichiometric or fuel-lean combustion. On the other hand, oxidation under very fuel-rich conditions is of interest as a possible way for the conversion of natural gas to syngas (mixture of CO, H2 and water). The syngas production can be a first step of the so called Gas-to-Liquid (GTL) process, eg the Fischer-Tropsch process [1] or similar where syngas is converted to liquid hydrocarbons. However, the oxidation mechanism at these conditions is still not fully described and understood. In this work, we measure absolute concentration profiles of the HCO radical in the low pressure (30 torr) flat methane/oxygen/nitrogen flames with equivalence ratios in the range between 1.0 and 2.0 and compare the results to the detailed kinetic modeling performed with several reaction schemes. HCO is a key intermediate in methane combustion …