等离子体辅助氧化体系的分子束质谱诊断  

Experimental Investigation of Plasma Assisted Oxidation System Using Molecular Beam Mass Spectrometry

作　　者：张儒征 廖汉东 杨玖重[2] 杨斌[1] ZHANG Ru-Zheng;LIAO Han-Dong;YANG Jiu-Zhong;YANG Bin(Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;National Synchrotron Radiation Laboratory, Hefei 230029, China)

机构地区：[1]清华大学能源与动力工程系,北京100084 [2]国家同步辐射实验室,合肥230029

出　　处：《工程热物理学报》2018年第7期1609-1613,共5页Journal of Engineering Thermophysics

基　　金：北京市自然科学基金资助项目(No.3162015)

摘　　要：等离子体助燃技术可以促进发动机在稀燃、低压和低温等极端条件下的点火和燃烧。全面探测燃料在等离子体作用下氧化过程的组分场对研究相关反应动力学机制有重要价值。本文设计搭建了结合介质阻挡放电反应器与光电离分子束质谱的实验平台,并对甲烷和乙烯在高压纳秒脉冲放电激励下的氧化过程进行了在线组分诊断.实验探测到离子、分子、自由基和激发态组分。对比文献中对类似等离子体辅助氧化体系的组分诊断结果,该诊断方法探测的组分更加全面。Plasma assisted combustion can promote ignition and combustion of engines under extreme conditions（i.e. lean burning, low pressure and low temperature）. A comprehensive diagnostics of speciation information in the oxidation process of fuels activated by plasma is essential to elucidate the corresponding chemical kinetics. In this work, we design and establish an experimental facility which couples a dielectric barrier discharge（DBD） reactor to a molecular beam mass spectrometer（MBMS）with photoionization. The oxidation systems of methane and ethylene triggered by the high-voltage nanosecond discharge were studied. With this apparatus, a nearly full view of speciation information consisting of ions, excited species, radicals and molecules was detected, which demonstrates the universal capability of this technique for the diagnostics of various components in plasma.

关 键 词：等离子体辅助氧化 分子束质谱 组分场诊断 

分 类 号：O646.9[理学—物理化学]