H_2-O_2对柴油机尾气颗粒物组分的影响分析  

Analyses of the influence of H_2-O_2 on diesel exhaust particulate matter compositions

作　　者：王忠[1,2] 杨芳玲[2] 王飞[2] 赵洋[2] 姚康 

机构地区：[1]无锡职业技术学院汽车学院,江苏无锡214121 [2]江苏大学汽车与交通工程学院,江苏镇江212013 [3]南京创企机械设备有限公司,江苏南京210003

出　　处：《环境污染与防治》2017年第1期11-15,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51376083;No.51506011);江苏省高校自然科学基金资助项目(No.13KJA470001)

摘　　要：针对柴油机进气通入H_2-O_2对尾气颗粒物组分的影响进行研究,利用热重分析仪和气相色谱/质谱联用(GC/MS)仪测量了通入2L/min H_2-O_2前后的尾气颗粒物组分,比较了尾气颗粒物中可溶有机物(SOF)的挥发特性及烃类、含氧类有机化合物,碳烟的质量分数变化。结果表明:通入H_2-O_2后,短链SOF占SOF的质量分数由11.90%增加到19.00%,长链SOF由88.10%下降为81.00%;SOF中的烃类有机化合物升高,含氧类有机化合物降低,先燃碳烟占柴油机尾气颗粒物的质量分数由23.91%降低为17.75%,后燃碳烟由24.79%升高为43.46%。因此,通入H_2-O_2可降低长链SOF和含氧类有机化合物。To research the influence of blending H2-O2 on diesel exhaust particulate matter composition, the thermogravimetric analyzer and GC/MS were employed in the particulate matter compositions test to seek for the difference between particulate matter composition of the original engine before and after blended with 2 L/min H2-O2. To be specific, SOF characteristics, changes of mass fractions of hydrocarbons,oxygenated constituents and soot were included in present research. It was well observed that after blending H2-O2, there were slight rise in short chain SOF,from 11.90% to 19.00% of the total SOF. In contrast,the long chain SOF accounted for 81.00% （mass fraction,the same below） after blending H2-O2, while that was 88.10% before. In addition, the compounds in SOF showed that the hydrocarbons fraction were moderately increased, but the oxygenated constituents were mildly declined. On the other hand, 23.91% of particulate matters were early burned soots before blending H2-O2, which dropped to 17.75%, compared to the later burned soot climbing from 24.79% to 43.46%. To summarize, blending H2-O2 helped reduce both long chain SOF and oxygenated constituents.

关 键 词：柴油机 热重分析 可溶有机物 碳烟 

分 类 号：X701[环境科学与工程—环境工程]