Identification of combustion intermediates in a low-pressure premixed laminar 2,5-dimethylfuran/oxygen/argon flame with tunable synchrotron photoionization
Identification of combustion intermediates in a low-pressure premixed laminar 2,5-dimethylfuran/oxygen/argon flame with tunable synchrotron photoionization
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利用可调谐同步加速器光电离识别低压预混合层流 2,5-二甲基呋喃/氧气/氩气火焰中的燃烧中间体
DOI：
10.1016/j.combustflame.2009.04.002
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发表时间：
2009-07
影响因子：
4.4
通讯作者：
Yuan, Tao
中科院分区：
文献类型：
--
作者：
Huang, Zuohua;Zhang, Kuiwen;Wei, Lixia;Wu, Xuesong;Yuan, Tao
采用可调谐真空紫外（VUV）同步辐射光电离和分子束质谱技术研究了当量比为2.0的低压（4.0kPa）预混层流2,5-二甲基呋喃(DMF)/氧/氩火焰。记录了DMF/O2/Ar火焰的光电离质谱，测定了燃烧中间体的光电离效率曲线。通过将测量的电离能与文献报道的电离能或用高斯-3法计算的电离能进行比较，确定了火焰的种类，包括同分异构体中间体。目前已检测到70多种呋喃及其衍生物、芳香族和自由基。根据所鉴定的中间体，提出了DMF、2-甲基呋喃和呋喃可能的反应途径。DMF可通过抽氢和热解反应消耗。2-甲基呋喃和呋喃可通过h萃取、h加成和热解反应消耗。
Low-pressure (4.0kPa) premixed laminar 2,5-dimethylfuran (DMF)/oxygen/argon flame with an equivalence ratio of 2.0 was studied with tunable vacuum ultraviolet (VUV) synchrotron radiation photoionization and molecular-beam mass spectrometry. Photoionization mass spectra of DMF/O2/Ar flame were recorded and the photoionization efficiency curves of the combustion intermediates were measured. Flame species, including isomeric intermediates, are identified by comparing the measured ionization energies with those reported in literatures or those calculated with Gaussian-3 procedure. More than 70 species have been detected, including furan and its derivatives, aromatics, and free radicals. Possible reaction pathways of DMF, 2-methylfuran, and furan are proposed based on the intermediates identified. DMF can be consumed by H-abstraction and pyrolysis reactions. 2-Methylfuran and furan can be consumed by H-abstraction, H-addition and pyrolysis reactions.
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