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Universal method for the determination of the associated natural gas composition by gas chromatography

Authors: S.A. Arystanbekova, M.S. Lapina, A.E. Skryabina, A.B. Volynsky (Gazprom VNIIGAZ LLC)
Complex of the methods is developed for the determination of a complete chemical composition of the associated natural gas. For the separation of hydrocarbons С1-С8+, carbon dioxide and high concentrations of hydrogen sulfide a column with a polymeric adsorbent is used. Nitrogen, oxygen, helium and hydrogen are separated on a column with the molecular sieves. Sulfur-containing compounds (low concentrations of hydrogen sulfide, carbonyl sulfide, carbon disulfide, individual mercaptanes С1-С4, dimethyl sulfide, dimethyl disulfide, tetrahydrothiophene and others) are determined by capillary gas chromatography with a flame-photometric detector.
Complex of the methods is developed for the determination of a complete chemical composition of the associated natural gas. For the separation of hydrocarbons С1-С8+, carbon dioxide and high concentrations of hydrogen sulfide a column with a polymeric adsorbent is used. Nitrogen, oxygen, helium and hydrogen are separated on a column with the molecular sieves. Sulfur-containing compounds (low concentrations of hydrogen sulfide, carbonyl sulfide, carbon disulfide, individual mercaptanes С1-С4, dimethyl sulfide, dimethyl disulfide, tetrahydrothiophene and others) are determined by capillary gas chromatography with a flame-photometric detector.


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