甲烷芳构化反应诱导期产物的质谱在线分析  

On-Line Mass Spectrometry for Product Analysis During the Induction Period of Methane Aromatization

作　　者：孙长勇[1] 宋一兵[1] 方奕文[1] 

机构地区：[1]汕头大学化学系,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2010年第3期39-43,共5页Journal of Shantou University：Natural Science Edition

摘　　要：利用在线质谱考查了甲烷芳构化反应的诱导期,建立了产物质谱在线分析的定量方法.依据质量碎片比例关系并采用类似矩阵解叠的方式处理重叠的质量碎片谱,再以He为内标校正反应尾气的体积变化和质谱的压力波动,利用相对灵敏度因子将质谱的强度信号转化,得到不同组分的摩尔流量,进而计算甲烷的转化率与产物的选择性.The induction period of the methane aromatization reaction was investigated by on-line mass spectrometer.A quantitative on-line mass spectrometry for product analysis was developed.According to mass fragmentation patterns,overlapping mass fragments were processed by a method similar to matrix deconvolution.The volume alteration of reaction effluent and the pressure fluctuation of MS were calibrated using He as an internal standard.The molar flow rate of each component was obtained by transformation of intensity signal using relative sensitivity factor,thus methane conversion and product selectivity could be calculated.

关 键 词：甲烷 芳构化 诱导期 质谱测量法 

分 类 号：O643[理学—物理化学]