An in situ mass spectrometry detection device for heterogeneous catalytic reaction intermediates and products

Abstract

The invention belongs to the technical field of heterogeneous catalysis and relates to an in-situ mass spectrometry detection device for intermediates and products in heterogeneous catalytic reaction.The in-situ mass spectrometry detection device comprises a reaction system, a mass spectrometry analytical system and a connection pipeline that connects the connection system and the mass spectrometry analytical system; the mass spectrometry analytical system includes an ionization source and a mass spectrometry mass analyzer; the reaction system includes a reaction gas source, a reaction liquidsource, a gasifying mixer and a reactor; the discharge end of the reaction gas source and the discharge end of the reaction liquid source are connected with a feed end of the gasifying mixer via a pipeline; the discharge end of the gasifying mixer is connected with the feed end of the reactor via a pipeline; a catalyst layer is arranged in the reactor; one end of the connection pipeline is embedded in the catalyst layer, and the other end of the connection pipeline is connected with the ionization source. The in-situ mass spectrometry detection device provides mass spectrometry in-situ detection for intermediates and products in heterogeneous catalytic reaction, and is particularly applicable to normal-pressure or high-pressure heterogeneous catalytic reaction involving dangerous gases, such as hydrogen, methane and carbon monoxide.

Description

technical field [0001] The invention relates to the technical field of heterogeneous catalysis, in particular to an in-situ mass spectrometry detection device for heterogeneous catalysis reaction intermediates and products. Background technique [0002] In chemical reactions, intermediates can provide intuitive evidence for the mechanism study of catalytic reactions, but because intermediates often have short lifetimes, it is necessary to develop in situ detection methods. Spectroscopic methods are most commonly used for in-situ tracking of heterogeneous catalytic reactions, such as in-situ infrared spectroscopy and in-situ Raman spectroscopy. Since complex and expensive vacuum interfaces are not required, spectroscopic methods are often used to observe catalyst properties in situ. Change and species of adsorbed species. However, the in-situ cell for in-situ spectroscopy is usually made of glass or quartz, which often cannot withstand high pressure. Other methods, such as ...

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Problems solved by technology

Electrospray ionization-mass spectrometry (ESI-MS) technology is often used in the detection of liquid-phase catalytic reaction intermediates (Marquez, C.A.; Wang, H.; Fabbretti, F.; Metzger, J.O. Electron-Transfer-Catalyzed Dimerization of trans-Anethole.[J].J.Am.Chem.Soc.,2008,130(51):17208-17209), while desorption electrospray ionization-mass spectrometry (DESI-MS) technology is more It is suitable for heterogeneous catalytic systems in which the catalyst is solid and the raw materials and products are gaseous or liquid (Perry, R.H.; Splendore, M.; Chien, A.; Davis, N.K.; Zare, R.N. [J]. Angew. Chem., Int. Ed., 2011, 50(1): 250-254, S250 / 251-S250 / 253), but this technology is carried out under open atmospheric pressure environment, for the high temperature and high pressure involving the participation of dangerous gases such as hydrogen, methane and carbon monoxide Heterogeneous catalytic reactions are not suitable

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