Development of  an in situ  high-pressure catalytic reactor for synchrotron radiation photoionization mass spectrometry

doi:10.3969/j.issn.0253-2778.2020.07.002

Abstract

Abstract: An in situ high-pressure catalytic reactor which can be coupled with synchrotron radiation vacuum ultraviolet photoionization mass spectrometry was developed. A tapered micro orifice was designed at the top of the high-pressure reaction tube for the first sampling, along with a quartz nozzle downstream connected with the mass spectrometry for the second sampling. Thus, the working pressure range of the reactor could reach from atmosphere to 3.6 MPa. In this design, gas dynamics theory and COMSOL Multiphysics software were applied for simulation, and the simulation results were verified by experimental measurements. The dimethyl ether (DME) carbonylation to methyl acetate reaction under different pressures near working conditions was studied by in situ mass spectrometry simultaneously. It was found that the selectivity of methyl acetate obtained in real time increased significantly with the increase of reaction pressure. The development of the in situ high-pressure catalytic reactor will be helpful to further study gas-solid catalytic reaction mechanism under high pressure.

Key words: high-pressure catalysis, synchrotron radiation, photoionization mass spectrometry, COMSOL Multiphysics simulation, DME carboxylation

CLC Number:

TH843

YU Shengsheng, WEN Wu, XU Minggao, YANG Jiuchong, BI Hailin, WANG Xudi, QI Fei, PAN Yang. Development of an in situ high-pressure catalytic reactor for synchrotron radiation photoionization mass spectrometry[J]. Journal of University of Science and Technology of China, 2020, 50(7): 880-886.

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Development of an in situ high-pressure catalytic reactor for synchrotron radiation photoionization mass spectrometry

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