Analysis on Kinetics Mechanism of Natural Gas Mixed with Hydrogen HCCI Combustion
In order to study the mechanism of hydrogen participating in the combustion process of natural gas(using methane as an example in this article),the simulation of methane mixed with different hydrogen fraction combustion was performed using the 0-D single zone model in CHEMKIN.With the increase of hydrogen fraction,the burning rate will in-crease,the maximum pressure in cylinder was down a bit in rich mixture and was rised obviously in lean mixture;The re-sults shows that OH is crucial in the dominant path of methane consuming after kinetics mechanism analysed.The forma-tion of OH is depended on HO2 before hydrogen mixed,but the formation of OH comes multi-path with high reaction rate;For instance,the temperature in cylinder increased obviously when the hydrogen fraction was 30%and the rate of dominant methane consuming path was 5.8×104 times as large as the rate without hydrogen.
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