乙醇柴油添加剂对柴油机颗粒排放及其挥发氧化特性影响  

Effects of Additives on Particle Emission and Its Vaporization Oxidization in Diesel Engine Fueled With Ethanol-Diesel Blends

作　　者：胡鹏[1] 孙平[1] 宁海强[1] 邬齐敏[1] 梅德清[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《内燃机工程》2015年第3期21-25,共5页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金资助项目(50976051);江苏省研究生创新计划项目(CXZZ12_0675);江苏高校优势学科建设工程资助项目(苏政办发〔2011〕6号)

摘　　要：研究了乙醇柴油及燃油添加剂对柴油机颗粒排放及其挥发氧化特性的影响。采用热重分析法分析柴油机燃用不同燃料时排气颗粒物的可溶性有机物挥发性、碳烟样品和颗粒物氧化特性。研究结果表明:含添加剂的乙醇柴油颗粒物排放远低于0#柴油的颗粒物排放,降幅在50%以上。颗粒在热失重过程中经历颗粒失水干燥、可溶性物质氧化和烟煤基元发生氧化反应三个阶段。与0#柴油相比,乙醇柴油及柴油添加剂能降低颗粒物中的可挥发部分质量份额,且乙醇柴油的效果最佳。乙醇及柴油添加剂有助于降低碳烟起燃温度和最大氧化速率对应的温度;与0#柴油相比、N5E10、N5E10XY0.1%和N5E10CN0.3%的碳烟最大氧化速率对应的温度依次降低了39、92、146℃。The effects of smoke suppressor（XY） and eetane number（CN） improver on particle emisson and its vaporization oxidization in diesel engine fueled with ethanol-diesel blends were investigated. Thermogravimetric Analysis （TGA） method was used to study vaporization of soluble organic fraction and oxidization of soot and particle. Results show that the particle emission of ethanol-diesel blends added with cetane number improver and smoke suppressor is far lower than that of No. 0 diesel fuel, reducing by more than 50%. The partiele matter oxidation process includes three distinct stages, dehydration, oxidation of soluble organic fraction and oxidation of solid carbon. The ethanol-diesel and fuel additives have a positive effect on reducing soluble organic fraction in particle matter and lowering ignition temperature and the maximum oxidation rate temperature of soot generated from the engine. When engine is fueled with NSE10, N5E10XY0.1 % and N5E10CN0.3 %, the temperature corresponding to the maximum soot oxidation rate is reduced by 39 ℃, 92 ℃ and 146 ℃ respectively, compared with pure No. 0 diesel fuel.

关 键 词：内燃机 柴油机 乙醇柴油 添加剂 颗粒物排放 热重法 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]