F-T柴油替代物低温氧化实验与简化机理研究  

Study on Low-Temperature Oxidation Experiment and Reduced Mechanism of F-T Diesel Surrogate

作　　者：华琰 王忠[1] 李瑞娜[1,2,3] 刘帅 柏泽川[1] 朱佳隆 HUA Yan;WANG Zhong;LI Ruina;LIU Shuai;BAI Zechuan;ZHU Jialong(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China;Vehicle Measurement,Control and Safety Key Laboratory of Sichuan Province,Xihua University,Chengdu 610000,China;Provincial Engineering Research Center for New Energy Vehicle Intelligent Control and Simulation Test Technology of Sichuan,Xihua University,Chengd1u610000,China)

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]西华大学汽车测控与安全四川省重点实验室,成都610000 [3]西华大学四川省新能源汽车智能控制与仿真测试技术工程研究中心,成都610000

出　　处：《工程热物理学报》2023年第9期2608-2616,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51776089);江苏省自然科学基金项目(No.BK20200910);天津大学内燃机燃烧学国家重点实验室开放课题(No.K2020-12);江苏省教育厅自然科学研究项目(No.20KJB470015);四川省新能源汽车智能控制与仿真测试技术工程研究中心开放课题(No.XNYQ2021-003);镇江市重点研发计划—社会发展(No.SH202006)。

摘　　要：根据F-T柴油的主要性质,提出了以摩尔浓度分别为94%和6%的正十二烷(NC_(12)H_(26))和异辛烷(IC_(8)H_(18))混合物作为F-T柴油的替代物。运用射流搅拌器(JSR)氧化平台与同步辐射真空紫外光电离质谱方法 (SVUV-PIMS),开展了F-T柴油替代物低温氧化实验。构建了F-T柴油的简化机理,分析了NC_(12)H_(26)与IC_(8)H_(18)的敏感性和氧化路径。结果表明,构建的简化机理对反应物的消耗和CH_(4)、C_(3)H_(6)等主要中间物质的生成具有良好的预测效果。在F-T柴油的氧化过程中,NC_(12)H_(26)增强了IC_(8)H_(18)的低温氧化活性,IC_(8)H_(18)减缓了NC_(12)H_(26)的低温反应速率。当氧化温度升高时,NC_(12)H_(26)的氢提取反应路径更加丰富,烷基自由基更容易通过解离反应生成小分子物质。According to the main properties of F-T diesel,the mixture of n-dodecane(NC_(12)H_(26))and isooctane(IC_(8)H_(18))with molar concentrations of 94%and 6%respectively is proposed as a surrogate for F-T diesel.The low temperature oxidation experiment of F-T diesel surrogate was carried out by using jet agitator(JSR)oxidation platform and synchrotron radiation vacuum ultraviolet photoionization mass spectrometry(SVUV-PIMS).The reduced mechanism of F-T diesel is constructed the sensitivity and oxidation path of NC_(12)H_(26) and IC_(8)H_(18) were analyzed by using the mechanism.The results shows that the reduced mechanism has a good prediction effect on the reactants consumptions and the main intermediate substances formations such as CH_(4) and C_(3)H_(6).During the oxidation of F-T diesel,NC_(12)H_(26) enhances the low-temperature oxidation activity of IC_(8)H_(18),and ICHis slows down the low-temperature reaction rate of NC_(12)H_(26).When the oxidation temperature increases,the hydrogen extraction reaction path of NC_(12)H_(26) is more abundant,and alkyl radicals are easier to form small molecules through dissociation reaction.

关 键 词：F-T柴油 正十二烷 异辛烷 射流搅拌反应器 简化机理 

分 类 号：TK16[动力工程及工程热物理—热能工程]