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Purification of Natural Gas by forming H2S Hydrates

Authors

  • Prof. Dr. Michael Golombok,

    Corresponding author
    1. Shell Global Solutions International B.V. Kessler Park 1, 2288 GS Rijswijk (The Netherlands)
    2. Faculty of Mechanical Engineering, Technische Universiteit Eindhoven, Postbus 513, 5600 MB Eindhoven (The Netherlands)
    • Shell Global Solutions International B.V. Kessler Park 1, 2288 GS Rijswijk (The Netherlands)
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  • Ronald Schoonebeek

    1. Shell Global Solutions International B.V. Grasweg 15, 1001 AA Amsterdam (The Netherlands)
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Abstract

H2S-hydrate formation is demonstrated as a method for cleaning contaminated natural gas. Not only the final equilibrium cleanup but also the rates of separation attainment are much higher than for CO2 hydrates. H2S concentrates in the hydrate phase and is then depleted from the gas; this was observed at temperatures as high as 15 °C. The shortest batch-formation times are on the order of 1 min at pressures of approximately 30 bar. Formation times of H2S hydrates are considerably shorter than for CO2. The supersaturation and mixing speed are the critical parameters as well as maintaining maximum solvation of H2S in water throughout the process.

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