摘要
利用反射激波管模型,采用生成速率法(ROP)对含氧燃料燃烧过程中PAHs中的主要物质苯、萘、菲、芘进行了模拟分析,探讨了含氧燃料PAHs形成的途径.结果表明:在当量比1.0、初始温度1 600 K的初始条件下,乙醇、二甲醚和碳酸二甲酯燃烧过程中,苯、萘、菲、芘的生成速率在数量级上依次递减;苯主要通过炔丙基的聚合反应形成;萘生成的主要反应是苯基的二次脱氢加乙炔及苯基与乙烯基乙炔的化合反应;菲和芘的形成主要是通过脱氢加乙炔反应;H和OH自由基对PAHs的氧化起着重要的作用;对于第3体"M"参与的反应,燃用乙醇抑制PAHs的形成,燃用DME对PAHs的形成影响不大,燃用DMC促进PAHs的形成.
According to shock tube model, the formation of benzene, naphthalene, phenanthrene and py- rene was analyzed by simulating their production rate through ROP to investigate the PAHs formation paths of oxygenated fuels. The results show that the magnitude of production rate of ethanol, DME and DMC is orderly decreased with initial equivalent ratio of 1.0 and temperature of 1 600 K. The polymeri- zation of propargyl is the main path for benzene formation. Naphthalene is formed mainly through second HACA reaction and combination reaction of phenyl and vinyl acetylene. Phenanthrene and pyrene are mainly formed through HACA reaction. H and OH radicals play an important role in the oxidation of PAHs. In the reaction of third body ＂M＂, ethanol can inhibit PAHs formation. DME has slight effect on PAHs formation, while DMC can promote PAHs formation.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2012年第2期155-159,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(50776042)
江苏省高校自然科学基金重点资助项目(10KJA470009)
江苏省2010年研究生创新计划项目(CX10B_261Z)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
含氧燃料
多环芳香烃
生成速率
形成路径
数值模拟
oxygenated fuel
PAHs
rate of production
formation path
numerical simulation
