Formaldehyde and Methanol Emissions from a Methanol/Gasoline-Fueled Spark-Ignition (SI) Engine
Formaldehyde and Methanol Emissions from a Methanol/Gasoline-Fueled Spark-Ignition (SI) Engine
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DOI：
10.1021/ef900175h
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发表时间：
2009-04
期刊：
影响因子：
5.3
通讯作者：
Yanju Wei;Shenghua Liu;Fang-Chi Liu;Jie Liu;Zan Zhu;Guangle Li
中科院分区：
文献类型：
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作者：
Yanju Wei;Shenghua Liu;Fang-Chi Liu;Jie Liu;Zan Zhu;Guangle Li
在一台三缸火花点火(SI)发动机上，研究了汽油、M10、M20和M85(汽油中掺入体积分数为10%、20%和85%的甲醇)时甲醛(HCHO)和甲醇(CH3OH)的排放特性以及三效催化转化器(TWC)的转化效率。采用脉冲放电氦电离检测器(PDHID)，用气相色谱(GC)检测甲醛和甲醇。试验结果表明，甲醇/汽油混合燃料发动机的甲醛排放随转速的增大而增大，而甲醇/汽油混合燃料发动机的甲醇排放随转速的增大而减小。汽油发动机的HCHO排放随发动机扭矩呈“U”型曲线变化。汽油中添加10%的甲醇会使甲醛的排放量增加一倍。甲醇含量的增加极大地改善了甲醛和甲醇的排放；它们的浓度都与循环供应的燃料甲醇的量大致成线性关系。轻烧TWC可完全脱除CH3OH。然而，甲醛的浓度...
With a three-cylinder spark-ignition (SI) engine, formaldehyde (HCHO) and methanol (CH3OH) emission characteristics as well as the three-way catalytic converter (TWC) conversion efficiency were investigated when it ran on gasoline, M10, M20, and M85 (gasoline blended with 10, 20, and 85% of methanol in volume), respectively. HCHO and CH3OH were detected by gas chromatography (GC) with a pulsed discharge helium ionization detector (PDHID). Experimental results show that HCHO emission increases with engine speed, while CH3OH emission from a methanol/gasoline blend-fueled engine decreases with it. HCHO emission from a gasoline-fueled engine varies in a “U” curve with the engine torque. The addition of 10% methanol in gasoline doubles the HCHO emission. The increasing methanol fraction greatly improves HCHO and CH3OH emission; their concentrations are both approximately linear to the amount of cyclically supplied fuel methanol. CH3OH can be totally removed by lightened-off TWC. However, the HCHO concentration...