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Abstract: A reduced and optimized kinetic mechanism was built for coke oven gas (COG) as a clean alternative vehicle fuel. This mechanism was constructed by combining a reduced methane mechanism, an optimized H₂/CO mechanism, and a reduced NO_x formation mechanism based on the mechanism structure for simple hydrocarbon fuels. The key reactions for combustion were investigated by a sensitivity analysis model, and the kinetic parameters of these reactions were optimized within the uncertainty range by an optimization model based on particle swarm optimization (PSO). The ignition delay time and laminar flame speed were simulated using the optimized mechanism with the software of CHEMKIN, and the results agreed well with the relevant experimental data. A computational fluid dynamics (CFD) model coupled with the optimized mechanism was established using KIVA-CHEMKIN software, and the in-cylinder combustion process was simulated. The simulation results (in-cylinder pressure and NO_x emission) showed good agreement with the engine bench test results.

清洁车用代用燃料焦炉气化学反应机理的简化与优化

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