摘要
建立了生物柴油PAHs生成的详细化学反应动力学机理,利用Chemkin-Pro软件中的反射激波管模型,模拟了生物柴油对混合燃料燃烧时多环芳烃PAHs,气相前驱物C2H2,C3H3,自由基O,OH以及低温CO,CO2生成的影响。模拟结果表明:随着生物柴油体积分数的增加,O,OH自由基峰值浓度增大,更多的C2H2,C3H3被氧化形成稳定的CO2;另外,生物柴油甲酯基中非羰基的氧使更多的碳原子在低温阶段通过OCHO以及CH3OCO分解转化为CO2,导致C2H2,C3H3生成量减小,抑制了PAHs的生成。
The detailed chemical kinetic mechanism of biodiesel PAH formation was determined and the influences of biodiesel on incomplete combustion products PAHs, gas-phase precursors C2H2 and C3 H3, free radicals O and OH and low-temperature products CO and COz were simulated with the shock tube model of CHEMKIN-PRO software. The results show that the con- centration of free radicals O and OH increase and more C2H2 and C3 H3 are oxidized into CO2 with the increase of biodiesel volume fraction. In addition, the non-carbonyl O in the methyl ester radical makes more carbon atoms convert into COz via OCHO and CH30CO decomposition in low-temperature period so that the C2 H2 and C3 H3 decrease, thus suppresses PAHs formation
出处
《车用发动机》
北大核心
2014年第5期12-16,共5页
Vehicle Engine
基金
国家自然科学基金项目(50906038)
江西省工业支撑项目(2009BGA01800)
