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首页> 外文期刊>Applied Surface Science >High speed laser activated membrane introduction mass spectrometric evaluation of bulk methylcyclohexane dehydrogenation catalysts
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High speed laser activated membrane introduction mass spectrometric evaluation of bulk methylcyclohexane dehydrogenation catalysts

机译：本体甲基环己烷脱氢催化剂的高速激光活化膜引入质谱评价。

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Laser activated membrane introduction mass spectrometry (LAMIMS) is a modification of membrane introduction mass spectrometry where a silicone membrane serves as a separator between an analyte stream and the vacuum of a quadrupole mass spectrometer. Carbon paper, commonly used as a fuel cell gas diffusion layer, has been overlaid upon the silicone membrane to serve as a support for catalyst array libraries that are heated by a CO_2 laser during evaluation. The LAMIMS reactor is a closed environment permitting steady state exposure of the catalyst library to the reactant stream. In this work, Pt/Al_2O_3 catalysts fa the dehydrogenation of methylcyclohexane (MCH) to toluene have been ranked by LAMIMS. Spot-to-spot evaluation times (after preconditioning) are 1 min in this study. The data suggests that by optimization of signal-to-noise and spot-to-spot dwell times, ranking can be conducted at substantially under a minute per array spot candidate.
机译：激光活化膜引入质谱仪（LAMIMS）是膜引入质谱仪的一种改进，其中有机硅膜用作分析物流与四极质谱仪真空度之间的分离器。通常用作燃料电池气体扩散层的碳纸已经覆盖在有机硅膜上，以用作评估过程中由CO_2激光加热的催化剂阵列库的载体。 LAMIMS反应器是封闭的环境，允许催化剂库稳定地暴露于反应物流中。在这项工作中，通过LAMIMS对甲基环己烷（MCH）脱氢为甲苯的Pt / Al_2O_3催化剂进行了分级。在这项研究中，点对点评估时间（预处理后）为1分钟。数据表明，通过优化信噪比和点对点的停留时间，可以在每个阵列点候选物基本上不到一分钟的时间内进行排名。

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