Photocatalytic reaction multi-system gas detection system combined with transient mass spectrometer

Abstract

The invention discloses a photocatalytic reaction multi-system gas detection system combined with a transient mass spectrometer, which is characterized in that an embedded platform provided with a photocatalytic reaction bottle assembly is positioned on a light source base, and a multi-position gas flow selection valve is also arranged on the embedded platform; a sample gas flow outlet end and a plurality of sample gas flow inlet ends are arranged on the multi-position gas flow selection valve, the sample gas flow outlet end is communicated with the transient mass spectrometer through a sample feeding pipe, and each sample gas flow inlet end is communicated with a photocatalytic reaction bottle assembly through a gas circulation hose; one of the photocatalytic reaction bottle assemblies is only used for transmitting inert gas; the multi-position airflow selection valve is electrically connected with an external controller and is used for selecting reaction gas generated in a certain photocatalytic reaction bottle assembly through the external controller and inputting the reaction gas into the transient mass spectrometer for analysis; and qualitative and / or quantitative gas detection of a photocatalytic multi-reaction system can be rapidly realized at the same time, the structure is simple, and the collection time and the detection time are relatively short.

Description

technical field [0001] The invention relates to the field of photocatalytic reaction gas detection devices, in particular to a device that can be used in conjunction with a transient mass spectrometer and can realize simultaneous online gas detection for a photocatalytic multi-reaction system. Background technique [0002] Photocatalytic reaction means that the reaction system containing catalyst converts light energy into chemical energy under light irradiation to promote the catalytic reaction; photocatalytic reaction is used in the fields of air purification, self-purification, medical and health, agriculture Deodorization and deodorization fields, water purification fields and many other fields have a wide range of applications; in photocatalytic reactions, reaction gases are often produced, and gas detection is very important in many fields. It is very important for studying catalyst activity and exploring reaction mechanisms. are of great significance. [0003] In ord...

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Problems solved by technology

[0003] In order to realize the detection of the gas produced by the catalytic reaction, the method usually used now is gas chromatography. However, the acquisition time and detection time required by gas chromatography are relatively long, and it is not possible to achieve rapid, qualitative and quantitative detection at the same time. gas detection

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