摘要
通过对癸酸甲酯化学动力学氧化机理与多环芳香烃(PAHs)生成机理的分析,构建了由713个基元反应和125种组分组成的生物柴油PAHs计算模型.研究了激波管条件下,生物柴油/氧气/氩气燃烧过程中苯环的产生过程、主要反应路径及变化规律.结果表明,该模型可以预测生物柴油燃烧过程中间产物浓度的变化规律;丙炔基(C3H3)对于PAHs第1个苯环的形成作用明显,脱氢加乙炔(HACA)反应和苯环间环化反应是形成两环和多环PAHs的主要路径;随着生物柴油和氧气的化学当量比的减小,PAHs生成量减少.
By analyzing the simplified methyl decanoate oxidation mechanism and PAHs formation mechanism,the PAHs formation mechanism model of bio-diesel was developed,which includes 125 species and 713 reactions.The PAHs formation process during the pyrolysis of argon-diluted mixtures of bio-diesel and oxygen in a reflected-shock tube was studied.The results show that the coupling model can reasonably predict the mole fraction profiles of intermediate radicals and the ignition delay time.The C3H3 radical has significant effect on the formation of first aromatic ring;H-abstraction acetylene addition mechanism and self-combination reaction of aromatics are the main routes for polycyclic aromatic formation.The PAHs emission decreases with the decrease of the equivalence ratio of bio-diesel to oxygen.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2010年第5期411-415,共5页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(50776042)
江苏省高校创新基金资助项目(CX07B_092Z)
江苏省重大项目(10KJA470009)
关键词
癸酸甲酯
生物柴油
PAHS
机理
methyl decanoate
bio-diesel
polycyclic aromatic hydrocarbons
mechanism
