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Experimental Study of Premixed Stoichiometric Ethylene/Oxygen/Argon Flame
Qing Zhang,Yu-yang Li,Zhen-yu Tian,Tai-chang Zhang,Jing Wang,Fei Qi*
Author NameAffiliationE-mail
Qing Zhang School of Mathematics and Physics, Anhui University of Technology, Ma'anshan 243002, China  
Yu-yang Li National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Zhen-yu Tian National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Tai-chang Zhang National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Jing Wang National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Fei Qi* National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China fqi@ustc.edu.cn 
Abstract:
A comprehensive experimental study of the premixed ethylene/oxygen/argon flame at 2.667 kPa with a stoichiometric equivalence ratio (φ=1) was performed with the tunable synchrotron photoionization and molecular-beam sampling mass spectrometry techniques. The isomers of most observed species in the flame were unambiguously identified by measurements of the photoionization efficiency spectra, e.g. C3H4, C2H4O and C4H4. The mole fraction profiles of species up to C7H8 were measured by scanning the burner position at the selected photon energies near ionization thresholds, and the flame temperature profile was obtained by using Pt/Pt-13%Rh thermocouple. Compared with the previous studies, a lot of new flame species:C3H2, C3H3, C3H5, C2H6O, C4H2, C4H4, C4H6, C3H4O, C3H6O, C3H8O, C5H6, C4H8O and C7H8, were observed. A series of free radicals in the flame are detected to be CH3, C2H3, C2H5, HCO, C3H3 and C3H5.Based on the experimental work, a reduced reaction mechanism was developed including 40 species and 223 reactions. Modeling and measurements agree well for the major species and most intermediates. A detailed kinetic model is desired for this flame.
Key words:  Premixed ethylene/oxygen flame, Tunable synchrotron photoionization, Reaction mechanism
FundProject:
对当量为1的预混乙烯/氧气/氩气火焰的实验研究
张清    ,李玉阳  ,田振玉  ,张泰昌  ,王晶  ,齐飞*
摘要:
利用可调谐同步辐射真空紫外光电离和分子束质谱技术研究了当量为1的低压、预混乙烯/氧气/氩气火焰.利用光电离效率谱和光电离质谱,探测了火焰中燃烧中间物,并鉴别了C3H4、C2H4O和C4H4等中间物的同分异构体.在近电离阈值光子能量下,通过扫描燃烧炉的位置测量了火焰中物质的摩尔分数曲线,并利用Pt/Pt-13%Rh热电偶测得了火焰的温度曲线.与以前的工作相比,观察到很多新的燃烧中间物,如C3H2、C3H3、C3H5、C2H6O、C4H2、C4H4、C4H6、C3H4O、C3H6O、C3H8O、C5H6、C4HsO和C7H8等.同时,在火焰中检测到了包括CH3、C2H3、C2H5、HCO、C3H3以及C3H5在内的一系列自由基.在实验工作的基础上,发展了一个包含40种火焰物质和223个基元反应的简化动力学模型来对火焰进行模拟.对主要物质和大部分中间产物的拟合结果与实验值相当吻合.
关键词:  预混乙烯/氧气/氩气火焰  可调谐同步辐射光电离  反应机理
DOI:10.1360/cjcp2006.19(5).379.7
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