Online analysis pretreatment device for trace hydrogen isotopes in natural gas

Abstract

The invention discloses an online analysis pretreatment device for trace hydrogen isotopes in natural gas. The device comprises a sample chamber, a six-way valve, an absorption cold trap, a preenrichment cold trap and an enrichment cold trap, wherein the sample chamber is connected with the absorption cold trap, the absorption cold trap is connected with the six-way valve, two ends of the preenrichment cold trap are respectively connected with the six-way valve, one end of the enrichment cold trap is connected with the six-way valve, and the other end of the enrichment cold trap is connected with a chromatographic column, and the six-way valve is respectively connected with a helium pressure regulating valve B and a gas circuit release valve D; an inlet and an outlet of the sample chamber are respectively provided with a gas circuit release valve; and a gas circuit release valve is arranged between the absorption cold trap and the six-way valve. The device disclosed by the invention can be used for realizing the online enrichment of a trace hydrogen component in a natural gas sample, separating the trace hydrogen component from other gas components so as to detect the hydrogen isotopes.

Description

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AI Technical Summary

Benefits of technology

This technology allows for efficient measurement of hydrogen (H2) by separating out specific gases that are present at very low concentrations like methane or nitrogen oxide. It also simplifies the overall analysis procedure while still allowing accurate results with minimal processing time.

Problems solved by technology

This patented describes various methods for detecting small quantities of specific molecules called volatile organics (VOC). These VOIs include methane, ethyl alcohol, propellant mixtures such as ammonia, uranitrite, and hexadecaboride, among others. Current techniques involve expensive equipment and complex operations involving multiple steps like acidification, liquid extraction, and gas phase chemical reaction.

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