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Photo ionization mass spectrum device used for detecting products of laser heating reactor in situ

A technology of laser heating and in-situ detection, which is used in mass spectrometers, parts of particle separator tubes, and sample introduction/extraction. It can solve many secondary and multiple reactions, uneven temperature distribution, and narrow pressure range. problem, to achieve the effect of narrow laser beam, space-saving design, and strong maneuverability

Active Publication Date: 2014-12-24
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0006] In order to solve the shortcomings of traditional thermochemical experiments in the process of studying the thermochemical reaction of substances, such as narrow pressure range, low heating efficiency, uneven temperature distribution, long residence time, and many secondary and multiple reactions, the present invention provides a Photoionization mass spectrometry device for in situ detection of laser-heated reactor products

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  • Photo ionization mass spectrum device used for detecting products of laser heating reactor in situ
  • Photo ionization mass spectrum device used for detecting products of laser heating reactor in situ
  • Photo ionization mass spectrum device used for detecting products of laser heating reactor in situ

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Embodiment

[0023] see figure 1 , a photoionization mass spectrometry device for in-situ detection of laser-heated reactor products, including a main cavity, a laser, a temperature measuring instrument 31 , a sampling mechanism and a mass spectrometer 62 .

[0024] The main cavity includes an ionization chamber 16, a reaction chamber 14, a vacuum linear drive mechanism 11, a laser transmission tube 12, and a sampling cone 15; The sampling hole, the sampling cone 15 is installed at the sampling hole on one side of the reaction chamber 14; the material of the sampling cone 15 is quartz, and the aperture at the top is 50-500 μm;

[0025] The upper part of the laser transmission tube 12 is located in the reaction chamber 14, the lower part is located outside the reaction chamber 14, and the lower part is installed on the vacuum linear drive mechanism 11; the upper end of the laser transmission tube 12 is equipped with a reaction base 13, and the reaction base 13 is located in the sampling con...

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Abstract

The invention relates to a laser heating reactor and a photo ionization mass spectrum device used for detecting products in situ. The laser heating reactor is composed of a main cavity, a laser device, a thermodetector, a sample feeding mechanism and a mass spectrum instrument. The technologies such as laser heating, in-situ ultrasound molecular beam sampling and vacuum ultraviolet photo ionization mass spectrum diagnosis are combined, and a novel thermal chemical reaction experimental study technology suitable for the pressure scope from vacuum and barometric pressure to high pressure is provided. Lasers with adjustable power are used for evenly and rapidly heating a reaction substrate, the sample reaction time is shortened, and the secondary reaction is omitted; molecules can be cooled with the ultrasound molecular beam sampling technology, so that unstable intermediate bodies survive; the vacuum ultraviolet soft ionization technology is adopted in vacuum ultraviolet photo ionization mass spectra, fragments are prevented from being produced, and the reaction products can be detected in real time.

Description

technical field [0001] The invention belongs to the technical field of thermochemical reaction experimental instruments, and in particular relates to a photoionization mass spectrometry device for in-situ detection of laser heating reactor products. Background technique [0002] During the thermochemical reaction, the reactants will produce a large number of stable and unstable products. Real-time and online acquisition of the composition and spatial distribution of these products is of great significance for the study of the detailed reaction kinetic mechanism in the thermochemical process. [0003] Thermochemical reactions are carried out under high temperature conditions, which require a complete high temperature reaction device and product detection device. Conventional high-temperature reactors usually use resistance wires as heating elements to heat the reactor, or directly use semiconductor materials such as SiC as the reactor, and use resistance heating to provide a ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/04H01J49/02H01J49/26
Inventor 杨玖重李玉阳周忠岳齐飞潘洋
Owner UNIV OF SCI & TECH OF CHINA
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