饱和呋喃类生物燃料化学反应机理的开发

Chemical Reaction Mechanism of Saturated Furan Biofuels

构建了一个包含四氢呋喃(THF)、2-甲基四氢呋喃(2-MTHF)和2-丁基四氢呋喃(2-BTHF)三种饱和呋喃类燃料的骨架机理,该机理包括133个组分和582个基元反应;描述了多环芳烃(PAH)形成并生长至芘(A4)、形成炭烟的化学反应过程。在较宽的试验条件下将不同子机理着火延迟时间、层流火焰速度和组分摩尔浓度等基础燃烧特性的试验数据与模拟结果进行对比,结果表明,该骨架机理可以较好地再现燃料的燃烧特性。此外,在汽油-柴油RCCI发动机中研究了直喷柴油掺混呋喃燃料对发动机炭烟排放的影响,结果再现了掺混饱和呋喃燃料可降低发动机炭烟排放的现象,验证了机理对炭烟排放结果预测的可靠性。

A skeletal reaction mechanism was constructed including three saturated furan biofuels such as tetrahydrofuran(THF),2-methyltetrahydrofuran(2-MTHF)and 2-butyltetrahydrofuran(2-BTHF).The mechanism contained 133 species and 582 reactions.In addition,the chemical reaction processes of polycyclic aromatic hydrocarbon(PAH)formation,growing to pyrene(A4)and soot formation were described.The experimental data of ignition delay,laminar flame velocity,and molar concentration of species for different sub-mechanisms were further compared with the simulated results under the wider operating conditions.The results showed that the mechanism could reproduce the combustion characteristics of fuel.In addition,the effect of blending diesel with furan fuels on the soot emissions was investigated on a gasoline-diesel RCCI engine.The results showed that blending saturated furan biofuel could mitigate the formation of engine soot emission.Consequently,the mechanism reliability for soot emission prediction was verified.