全氟己酮抑制乙醇/汽油替代物爆炸特性及机理研究  

Study on the inhibition characteristics and mechanism of ethanol/gasoline alternative explosion by perfluoro(2-methyl-3-pentanone)

作　　者：慕雪蒙 丛海勇 毕明树[1] MU Xuemeng;CONG Haiyong;BI Mingshu(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,大连116024

出　　处：《火灾科学》2023年第4期216-224,共9页Fire Safety Science

基　　金：国家重点研发计划项目(2021YFB4000904);国家自然科学基金项目(51906030);火灾科学国家重点实验室开放基金项目(HZ2019-KF07)。

摘　　要：为探究全氟己酮对不同乙醇掺混浓度汽油替代物的抑制效果和其详细反应动力学机理,开展了全氟己酮抑制乙醇/汽油替代物爆炸实验及模拟研究。结果表明,全氟己酮可有效降低不同浓度乙醇/汽油替代物的爆炸超压和火焰速度,全氟己酮浓度越高抑制效果越显著。此外,组建了包含241种组分、1346个基元反应的全氟己酮抑制乙醇/汽油替代物燃烧的动力学机理模型,研究发现提升乙醇掺混浓度,层流燃烧速度增加、火焰温度降低;全氟己酮通过含氟自由基捕获H、OH等关键自由基降低反应强度,R694:CF_(3)+H CF_(2)+HF和R760:CF_(2)+OH CF_(2):O+H为关键捕获路径。Gasoline alternative blended with biofuel ethanol has become a widely used alternative fuel worldwide,and the blending concentration of ethanol varies from country to country.In order to clarify the inhibition effect and reaction mechanism of perfluoro(2-methyl-3-pentanone)(C_(6)F_(12)O)on alternative gasoline with various ethanol blending concentrations,the inhibition effect of C_(6)F_(12)O on the explosion of ethanol/gasoline alternative was experimentally evaluated.The results showed that C_(6)F_(12)O could effectively inhibit the explosion overpressure and flame propagation speed of gasoline alternative blended with various ethanol concentrations.The higher the concentration of C_(6)F_(12)O,the more noteworthy the inhibition effect.Moreover,the kinetic mechanism of C_(6)F_(12)O containing 241 components and 1346 radicals to suppress the combustion of ethanol/gasoline alternative was also developed in the present work.The simulation found that the higher the ethanol blending ratio,the higher the laminar burning velocity and the lower the flame temperature;in addition,C_(6)F_(12)O mainly captures key radicals such as H and OH through fluorinated radicals and generates stable substances,thus achieving the purpose of reducing the reaction intensity.

关 键 词：爆炸抑制 哈龙替代物 燃烧机理 乙醇/汽油替代物 层流燃烧速度 

分 类 号：X932[环境科学与工程—安全科学]