基于尺寸分布的生物柴油排气微粒组分研究  

Research on PM Component of Diesel Engine Fueled with Biodiesel Based on PM Size Distribution

作　　者：谭建伟[1] 葛蕴珊[1] 何超[1] 尤可为[2] 韩秀坤[1] 

机构地区：[1]北京理工大学汽车动力性及排放测试国家专业实验室,北京100081 [2]中国汽车技术中心北京工作部,北京100021

出　　处：《内燃机工程》2010年第1期17-20,26,共5页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金(50876013);国家博士后基金项目(20070420301)

摘　　要：使用电子低压撞击仪(ELPI)分级粒径采集了柴油机的排气微粒,应用热重分析(TGA)方法研究了发动机燃用柴油和两种生物柴油时,排气微粒中挥发性物质(VOF)的含量。研究结果表明:燃用生物柴油,排气微粒VOF含量高于纯柴油,排气中小粒径微粒的VOF质量百分比均高于柴油,与总微粒的排放规律相同;超细微粒(d<0.100μm)具有较高的VOF质量百分比。柴油机燃用生物柴油后,总微粒中VOF质量百分比从44.917%上升到70.767%,在0.100μm<d≤0.255μm粒径段,VOF增幅较大,表明生物柴油微粒在此粒径段具有较强的吸附能力。The particulate matter（PM） of a diesel engine was sampled by using electrical low pressure impactor（ELPI）, volatile fraction（VOF） in PM of the diesel engine was analyzed by the thermo-gravimetric analysis（TGA） when the engine was fueled with diesel fuel and biodiesel. The results show that the VOF content in PM when the engine is fueled with biodiesel is higher than that when the engine is fueled with diesel fuel. VOF content in PM with smaller size when the engine is fueled with biodiesel is higher than that when the engine is fueled with diesel fuel. VOF content in PM with ultra-fine size （d〈0. 100μm ） is higher. VOF content in PM increases from 44. 917 %（mass） to 70. 767 % （mass） when the fuel changes from diesel fuel to biodiesel. VOF content in PM with size of 0. 100 μm〈d≤0. 255 μm increases significantly, which indicates that PM has a stronger adsorptivity.

关 键 词：内燃机 生物柴油 柴油机 热重法 挥发性物质 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]