正丁醇/柴油燃烧颗粒的碳官能团及氧化活性研究  

Study on the Carbon Functional Groups and Oxidation Activity of n-Butanol/Diesel Combustion Particles

作　　者：瞿磊[1] 王忠[1] 李铭迪[2] 张健[1] 杨芳玲[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏省镇江市212013 [2]常熟理工学院汽车工程学院,江苏省常熟市215500

出　　处：《中国电机工程学报》2016年第16期4484-4489,4538,共6页Proceedings of the CSEE

基　　金：国家自然科学基金(51376083;51506011);江苏省高校自然科学基金(13KJA470001);江苏高校优势学科建设工程资助项目(PAPD)~~

摘　　要：为了解掺混正丁醇对柴油机颗粒表面官能团及氧化活性的影响,采用颗粒分级采样装置收集柴油机颗粒样品。运用软X射线近边吸收光谱等技术对正丁醇质量掺混比分别为0、5%、10%的正丁醇/柴油燃烧颗粒(N0、N5、N10)表面官能团及氧化活性开展研究。结果表明,颗粒表面官能团主要为芳香烃C=C、C—H与碳酸盐类/羰基C=O官能团,其中C=C键的吸收峰强较大。随着正丁醇质量掺混比的增加,C=C键的吸收强度减弱,燃料不完全燃烧产生的多环芳烃和石墨碳含量逐渐减少。N0、N5、N10燃烧颗粒表面脂肪族C—H官能团的当量峰高I_(C-H)/I_(C=C)分别为1.7、2.2、2.6,随正丁醇质量掺混比的增加而逐渐增大,形成的颗粒表面脂肪族C—H含量增加。颗粒的活化能随着正丁醇掺混比的增加而逐渐减小,颗粒的氧化活性增强,易于发生氧化燃烧反应。To understand the influence of n-butanol on the surface functional groups and oxidation activity of diesel engine particles, particle size sampling device was used to collect the diesel engine particles. Different n-butanol quality mixing ratios of 0, 5%, 10% n-butanol/diesel combustion particles（N0, N5, N10） were carried out the experimental study on the surface functional groups and oxidation activity by using the technique of soft X-ray near-edge absorption spectroscopy and so on. The results show that the surface functional groups of particles are mainly aromatic hydrocarbons C=C, C — H and carbonate/carbonyl C=O functional groups. Among these groups, the absorption peak of C=C bond is stronger. With the increase of n-butanol proportion, the absorption intensity of C=C bond is weakened. The PHAs and graphite carbon contents gradually reduce that are produced by incomplete combustion of fuel. The equivalent peak ratio（I_（C-H）/I_（C=C）） of aliphatic C—H groups of N0, N5 and N10 combustion particles are 1.7、2.2、2.6 respectively. With the increase of n-butanol ratio, the equivalent peak ratio increases, and the content of aliphatic C — H increases gradually. The activation energy of particles decreases with the increase of n-butanol proportion, and the oxidation activity of particles increases which is prone to oxidation combustion reaction.

关 键 词：颗粒 官能团 氧化活性 正丁醇 柴油机 

分 类 号：TM[电气工程]