Trace hydrogen fractionation-free quantitative enrichment system and enrichment method

Abstract

The invention belongs to geochemical analysis in the field of oil-gas exploration, which includes enrichment and concentration on a tested material. Particularly, the invention relates to a system for extracting hydrogen from natural gas, enriching and analyzing the hydrogen and a method thereof. The system is characterized by comprising a sample injection unit, a vacuum unit, a monitoring unit and a collecting unit, wherein the sample injection unit and the vacuum unit are respectively connected with the collecting unit. The fractionation-free system for enriching trace hydrogen in natural gas has simple equipment and flexible operation. The design of double sample injection systems not only can process conventional natural gas, but also can sample and analyze hot spring gas with specialsampling. Meanwhile, other component container bottles 113 can be selected according to the concentration of hydrogen in the natural gas and the sampling volume, and the volume of added He is accordingly controlled and further the times of hydrogen enrichment is controlled, thus the application range of the technology is greatly enlarged.

Description

technical field [0001] The invention belongs to geochemical analysis in the field of oil and gas exploration, and concentrates and concentrates test materials. Specifically, the invention relates to a system and method for analyzing hydrogen extracted from natural gas after enrichment. Background technique [0002] The origin of oil and gas is one of the basic research contents in the field of oil and gas exploration. With the efforts of geochemists, organic origin has become the main theory leading the origin of oil and gas today. At the same time, the organic-inorganic interaction in the study of oil and gas genesis has attracted more and more attention of scholars. The contribution of mantle-derived hydrogen-rich fluids to the hydrocarbon generation of organic matter has been confirmed by simulation experiments. However, how to determine the mantle source of hydrogen has become a bottleneck in this research field. The study of the stable isotope composition of hydrogen...

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Problems solved by technology

[0004] The main problems of this technology are: (1) During the treatment process, the introduction of oxidizing gas reacts with hydrocarbon gas, and after the hydrogen atoms in the hydrocarbon gas are converted into hydrogen, the concentration and isotope composition of hydrogen in the original natural gas are changed; (2) High temperature conditions are required in the processing process, which requires relatively high energy consumption; (3) The isotopic geochemical significance of hydrogen in the original natural gas is lost due to changes in the concentration and isotopic composition of hydrogen in the original natural gas

[0006] The main problems that this technology exists are: (1) utilize high temperature to carry out reaction, energy consumption is high; (2) the hydrogen in the hydrocarbon gas and the hydrogen in water are converted into H 2 , changing the content and isotope composition of hydrogen in the original natural gas, and losing its original geochemical information; (3) The multiple of hydrogen enrichment is unknown

[0008] The main problems of this technology are: (1) the high temperature reaction is used, which consumes a lot of energy; (2) the Fischer-Tropsch reaction takes place to transfer the hydrogen atoms on the hydrocarbon gas to form H 2 , changing the original hydrogen content and isotope composition in natural gas, and losing the geochemical significance of hydrogen in natural gas; (3) The enrichment factor of original hydrogen in natural gas is unknown

[0009] At present, the hydrogen enrichment technology mainly relies on the reforming technology, which is essentially a Fischer-Tropsch reaction under high temperature conditions, which inevitably enriches the hydrogen atoms in the hydrocarbon gas in the natural gas into molecular hydrogen. Therefore, it is necessary to invent a new method that can quantitatively enrich hydrogen in natural gas without fractionation. technology and related equipment and methods

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