Hydrogen sulfide removal from gas stream

The membrane-aided treatment of natural and associated petroleum gases is aimed at both recovery of acid gases (СО2 and Н2S) making the gas compliant with the gas pipeline requirements, and removal of methane in the tertiary oil recovery processes for further injection of carbon dioxide in formation. Natural and associated petroleum gases often contain chemically aggressive or easily condensable components which materially affect the membrane performance and the degree of APG recovery. Removal of these components and/or control of their content within the critical limits of the membrane capacity require an expensive treatment. Furthermore, conventional membranes used for acid components removal during APG processing accumulate heavy hydrocarbons in the retentate which results in condensation commensurate with the membrane element volume. The above said restricts the area of application of conventional membranes by APG recovery and APG processing and leads to their functional complexity and drives operating costs.

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General information

The membrane developed byGrasys ispredominantly designed for removal ofhydrogen sulfide, moisture and carbon dioxide together with heavy hydrocarbons and excludes the possibility ofhydrocarbons and moisture condensation within the membrane device.

The membrane systems for acid gases removal from natural and associated gas offered bythe company are stable tohigh concentrations ofacid components, highly efficient inhydrogen sulfide removal and extremely cost effective inoperation.

The adoption ofGrasys membrane technology allows

  • Processing gases with the hydrogen sulfide content ofupto5 at100% vol. humidity and with the carbon dioxide content ofupto3035% vol.
  • Reducing the content ofhydrogen sulfide inthe product gas uptothe requirements allowing its use asafuel gas for power plants, oil heating furnaces and boiler houses
  • Bringing product gas inline with the GOST 554287 ( 51.4093.) requirements subject toinsignificant (upto0.1% vol.) hydrogen sulfide concentrations
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