Petrochina Company Limited

Shunlin Tang

Guangyou Zhu

The invention provides a method and device for measuring mercury isotopes in natural gas. The method includes the following steps: (1) primary enrichment: subjecting natural gas to a three-stage cascading absorption with an acidic potassium permanganate aqueous solution, and collecting all of the acidic potassium permanganate aqueous solutions in which natural gas is absorbed in step (1); (2) mercury purification and enrichment: reducing the mercury absorbed in the step (1) to mercury vapor with a stannous chloride solution, and then purifying and enriching the mercury vapor by using an acidic potassium permanganate aqueous solution; (3) detecting the acidic potassium permanganate solution in which the mercury vapor is enriched in step (2) to determine the total mercury content therein; and (4) detecting the acidic potassium permanganate solution in which the mercury vapor is enriched in step (2) to determine the composition/content of stable mercury isotopes therein.

Methods and devices for detecting mercury isotopes in natural gas

A method and device for detecting mercury isotopes in an oil-gas source. The device includes at least one enrichment-absorption system for mercury in crude oil/hydrocarbon source rock, an enrichment-absorption system for mercury in natural gas and at least one secondary purification-enrichment system for mercury. The enrichment-absorption system for mercury in crude oil/hydrocarbon source rock includes three air-absorption bottles, a pyrolysis/cracking system, five impact samplers, and a vacuum pump, which are connected in series by pipe lines. The enrichment-absorption system for mercury in natural gas includes five impact samplers connected in series, wherein the first impact sampler is connected to the natural gas outlet from the natural gas well and the last impact sampler is connected to the cumulative gas flow meter.

Methods and devices for detecting mercury isotopes in oil-gas sources

The present disclosure relates to a method and device for detecting mercury isotopes in crude oil. The device comprises an enrichment-absorption system and a secondary purification-enrichment system for mercury isotopes, wherein the enrichment-absorption system includes an air-background mercury absorption system, a pyrolysis/cracking system, a mercury-sample absorption system connected in series with pipe lines, and a vacuum pump, and the vacuum pump is connected to the mercury-sample absorption system through a pipe line; the secondary purification-enrichment system includes a nitrogen-gas cylinder, a collection bottle with potassium permanganate absorption liquid, and a secondary enrichment-absorption bottle connected in series with pipe lines, wherein the secondary purification-enrichment system further includes a stannous-chloride storage bottle, which is connected to a pipe line between the nitrogen-gas cylinder and the collection bottle with potassium-permanganate absorption liquid via a peristaltic pump and through a pipe line.

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Beijing, China

Shunlin Tang