装有NTP装置的柴油机排放颗粒物的热重特性  

Thermogravimetric characteristics of particulate matter emitted by a diesel engine with NTP technology

作　　者：高建兵[1] 马朝臣[1] 邢世凯[2] 刘江权 孙丽玮[1] 葛蕴珊[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]河北师范大学职业技术学院,石家庄050024

出　　处：《哈尔滨工业大学学报》2017年第7期125-130,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51476012);河北省科技计划项目(15273703D)

摘　　要：为解决低温等离子体(NTP)发生器再生的问题,用热重分析仪研究发动机不同工况下采集颗粒物的氧化特性.结果表明:不同负荷下,原始颗粒物中挥发性有机成分(VOC)质量分数差别较大,微粒聚集体中VOC质量分数差别较小;对于原始颗粒物和微粒聚集体,高挥发性有机成分(HVOC)在VOC中所占比重随负荷的增加而增加;原始颗粒物的热重曲线随负荷的增加变化不明显,微粒聚集体的热重曲线显著左移;微粒聚集体氧化所需的时间较原始颗粒物长;不同柴油机负荷,在恒温氧化条件下,原始颗粒和微粒聚集体的活化能变化不明显,流经NTP发生器后逃逸到大气中的颗粒物的活化能显著高于原始颗粒物和微粒聚集体的活化能.To resolve the regeneration problem of non-thermal plasma （ NTP ） reactor, the oxidation behaviors of particulate matter （ PM） sampled at different engine loads were investigated using thermogravimetric analyzer. The results showed that the content of volatile organic compounds （ VOC） differed great at different engine loads in raw PM but little in PM aggregation, and the percentage of the high volatile organic compounds （ HVOC） in VOC increased with engine load. Little difference was observed for the oxidation behaviors of raw PM collected at different engine loads while the profiles of oxidation activity of PM aggregation moved toward left when increasing engine load. Longer time was needed to oxidize PM aggregation than raw PM. At isothermal condition, the activation energy was similar for raw PM and PM aggregation, however, the activation energy of the PM escaping from non-thermal plasma reactor was higher than that of raw PM and PM aggregation.

关 键 词：柴油机颗粒物 低温等离子体 热重特性 氧化活性 反应动力学 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]