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Identification of Intermediates in Pyridine Pyrolysis with Molecular-beam Mass Spectrometry and Tunable Synchrotron VUV Photoionization
Xin Hong, Tai-chang Zhang, Li-dong Zhang, Fei Qi *
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
Abstract:
The pyrolysis of pyridine (5.26% pyridine in argon) was performed with tunable synchrotron vacuum ultraviolet photoionization and molecular-beam mass spectrometry technique atthe temperature range of 1255-1765 K at 267 Pa. About 20 products and intermediates,containing major species H2, HCN, C2H2, C5H3N, C4H2, and C3H3N, were identified by near-threshold measurements of photoionization mass spectra and their mole fractions vs.temperatures were estimated. The major reaction pathways are analyzed based on theexperimental observations
Key words:  Pyridine pyrolysis, Intermediate, Tunable synchrotron VUV photoionization,Molecular-beam mass spectrometry
FundProject:
Identification of Intermediates in Pyridine Pyrolysis with Molecular-beam Mass Spectrometry and Tunable Synchrotron VUV Photoionization
Xin Hong, Tai-chang Zhang, Li-dong Zhang, Fei Qi *
中国科学技术大学国家同步辐射实验室,合肥230029
摘要:
利用可调谐同步辐射真空紫外光电离结合分子束取样技术研究吡啶的热解,温度是1255―1765 K、压力为267 Pa. 通过测量光电离质谱和光电离效率谱,鉴别了近20种产物和中间物,并给出了物种随温度变化的摩尔分数. 主要的产物为H2、HCN、C2H2、C5H3N、C4H2和C3H3N. 根据实验结果分析了吡啶热解的一些主要反应路径.
关键词:  吡啶热解,中间体,可调谐同步辐射VUV光电离,分子束质谱
DOI:10.1088/1674-0068/22/02/204-209
分类号: