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Catalytic conversion-based gas concentration quantification system and method

A technology of catalytic conversion and gas concentration, applied in the field of gas concentration quantification system based on catalytic conversion, can solve the problems of weak mass change and lack of quantitative means of diffusion rate in diffusion cells, and achieve the effect of easy portability, simple and reliable operation

Inactive Publication Date: 2020-01-07
JINAN UNIVERSITY
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Problems solved by technology

Traditionally, the permeation rate of the permeation tube can be obtained by accurately weighing the permeation tube several times, but because the mass change caused by permeation tube permeation is very slight, it usually takes several weeks to obtain the permeation rate accurately
The diffusion rate of the diffusion cell is currently lack of effective quantitative means

Method used

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  • Catalytic conversion-based gas concentration quantification system and method

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0025] The gas concentration quantification system based on catalytic conversion adopted in the present invention includes a carrier gas source 1, a mass flow controller 2, a target gas generation source 3, a three-way valve 4, a catalytic heating box 5, and a carbon dioxide gas analyzer 6;

[0026] The output end of the carrier gas source 1 is connected to the input end of the mass flow controller 2, the output end of the mass flow controller 2 is connected to the input end of the target gas generation source 3, and the output end of the target gas generation source 3 is connected to the three-way valve 4 The inlet 41 of the three-way valve 4 is connected with the carbon dioxide gas analyzer 6, the second outlet 43 of the three-way valve is connected with the input end of the catalytic heating box 5, and th...

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Abstract

The present invention relates to a catalytic conversion-based gas concentration quantification system and method. The system comprises a carrier gas source 1, a mass flow controller 2, a target gas generation source 3, a three-way valve 4, a catalytic heating box 5, and a carbon dioxide gas analyzer 6; the output end of the carrier gas source 1 is connected with the input end of the mass flow controller 2; the output end of the mass flow controller 2 is connected with the input end of the target gas generation source 3; the output end of the target gas generation source 3 is connected with theinlet 41 of the three-way valve 4; the first outlet 42 of the three-way valve 4 is connected with the carbon dioxide gas analyzer 6; the second outlet 43 of the three-way valve 4 is connected with the input end of the catalytic heating box 5; and the output end of the catalytic heating box 5 is connected with the carbon dioxide gas analyzer 6.

Description

technical field [0001] The invention relates to the technical field of instrument measurement and analysis for calibration of organic matter in atmospheric chemistry, in particular to a gas concentration quantification system and method based on catalytic conversion. Background technique [0002] Volatile organic compounds (VOCs) are a class of organic compounds ubiquitous in the atmosphere. They are important precursors for the formation of near-surface ozone and fine particles. important role. [0003] The accurate measurement of current volatile organic compounds depends on accurate standard gases and corresponding calibration methods. The most commonly used standard gas configuration method is to put a certain amount of one or more volatile organic compounds into a compressed steel cylinder to form a standard gas of volatile organic compounds, and the concentration level is generally 1-10ppm. When in use, the dynamic gas distribution method is generally used to continu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/0006G01N33/004G01N33/0047
Inventor 袁斌邵敏王思行
Owner JINAN UNIVERSITY
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