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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．在近电离阈值光予能量下,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、C4H8O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．
A low pressure, premixed ethylene / oxygen / argon flame with an equivalent weight of 1 was investigated using tunable synchrotron radiation vacuum ultraviolet ionization and molecular beam mass spectrometry. Using photoionization efficiency spectroscopy and photoionization mass spectrometry, the combustion intermediates in flame were detected and the isomers of intermediates such as C3H4, C2H4O and C4H4 were identified. Under the near ionization threshold of light pre-energy, the mole fraction curve of the material in the flame was measured by scanning the position of the burner and the temperature curve of the flame was measured with a Pt / Pt-13% Rh thermocouple. Compared with previous work, many new combustion intermediates such as C3H2, C3H3, C3H5, C2H6O, C4H2, C4H4, C4H6, C3H4O, C3H6O, C3H8O, C5H6, C4H8O and C7H8 were observed. At the same time, a series of free radicals including CH3, C2H3, C2H5, HCO, C3H3 and C3H5 were detected in flame. Based on the experimental work, a simplified kinetic model of 40 flame species and 223 elementary reactions was developed to simulate the flame. The fitting results of the major substances and most of the intermediates are in good agreement with the experimental values.