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A method and device for testing mercury isotopes of natural gas

A mercury isotope and natural gas technology, which is used in measurement devices, preparation of test samples, spectrometer detectors, etc., can solve the problems of difficult to analyze mercury stable isotopes, unsuitable for mercury stable isotope analysis, and short enrichment time.

Active Publication Date: 2021-06-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the short enrichment time of natural gas with low mercury content, the current liquid oxidation method is difficult to analyze the stable isotope of mercury in the absorption liquid, and the solid oxidation method and amalgam method are not suitable for the analysis of stable isotope of mercury.

Method used

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  • A method and device for testing mercury isotopes of natural gas
  • A method and device for testing mercury isotopes of natural gas

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Experimental program
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Embodiment 1

[0065] A mercury isotope detection device for natural gas, the detection device includes a mercury isotope enrichment absorption system 1 and a secondary purification enrichment system 2 .

[0066] Such as figure 1As shown, the enrichment absorption system 1 includes an empty impact bottle 14 connected in sequence with pipelines, a first absorption bottle 11, a second absorption bottle 12, and a third absorption bottle 13 with a built-in acidic potassium permanganate aqueous solution, and The silica gel impact bottle 15 with built-in silica gel; the empty impact bottle 14, the first absorption bottle 11, the second absorption bottle 12, the third absorption bottle 13, the silica gel impact bottle 15, the potassium permanganate absorption liquid collection bottle 21 and the second absorption bottle The secondary enrichment absorption bottles 22 are all borosilicate glass bottles, and a gas inlet and a gas outlet are respectively arranged on the top respectively. The gas inlet c...

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Abstract

The invention provides a method and a device for testing mercury isotopes of natural gas. The method comprises the following steps: (1) initial enrichment: using an acidic potassium permanganate aqueous solution to carry out three-stage series absorption of natural gas, and collecting all the acidic potassium permanganate solutions that have absorbed natural gas in step (1); 2) Mercury purification and enrichment: use stannous chloride solution to reduce the mercury absorbed in step (1) to mercury vapor, and then use acidic potassium permanganate aqueous solution to purify and enrich mercury vapor; (3) to step (2) The acidic potassium permanganate solution enriched with mercury vapor is detected to determine the total mercury content therein; (4) the acidic potassium permanganate solution enriched with mercury vapor in step (2) is detected to determine the stable isotope of mercury therein composition content.

Description

technical field [0001] The invention relates to the field related to natural gas exploitation, in particular, the invention relates to a method for testing mercury isotopes of natural gas and a device thereof. Background technique [0002] Mercury vapor content in natural gas as an identification index of natural gas origin was proposed as early as 1974 by the former Soviet scientist Н.А. Mercury content in the atmosphere (the background value of mercury in the atmosphere is 1.5-2.0ng / m 3 ) 2 or even more than several orders of magnitude. The mercury content in coal-type gas is generally higher than that in oil-type gas, but there is an overlap between the two, which cannot be accurately identified by mercury vapor content. Accurate acquisition of mercury isotope information is expected to solve this problem. At present, there are two methods for collecting mercury in natural gas: one is mercury oxidation method, and the other is amalgam method. Mercury oxidation method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N27/62G01N1/28G01N1/34G01N1/44
CPCG01N21/6404G01N33/0045H01J49/28G01N1/28G01N1/34G01N1/44G01N27/62G01N33/225G01N27/025G01N33/2835H01J49/025
Inventor 朱光有汤顺林
Owner PETROCHINA CO LTD