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Analysis of the Dissolution of CH 4 /CO 2 -Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy

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  • Zheng Li

    (Institute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
    School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China)

  • Christine C. Holzammer

    (Institute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
    Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Paul-Gordan-Str. 6, 91052 Erlangen, Germany)

  • Andreas S. Braeuer

    (Institute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany)

Abstract

We report an experimental study for the investigation into the suitability of hydrate formation processes for the purification of methane (CH 4 ) from carbon dioxide (CO 2 ) at a sub-cooling temperature of 6 K and a pressure of 4 MPa. The experiments were conducted in a stirred batch reactor. Three different initial CH 4 /CO 2 mixtures with methane fractions of 70.1 mol%, 50.3 mol%, and 28.5 mol% were tested. The separation efficiency was quantified by measuring in situ via Raman spectroscopy the ratios of CH 4 /CO 2 in the gas mixture, the liquid water-rich phase before hydrate formation, and the solid hydrate phase after the onset of the hydrate formation. The results indicated that the main separation effect is obtained due to the preferential dissolution of CO 2 into the liquid water-rich phase before the onset of the hydrate formation.

Suggested Citation

  • Zheng Li & Christine C. Holzammer & Andreas S. Braeuer, 2020. "Analysis of the Dissolution of CH 4 /CO 2 -Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy," Energies, MDPI, vol. 13(4), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:793-:d:319377
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    References listed on IDEAS

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