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The Effect of CO 2 Partial Pressure on CH 4 Recovery in CH 4 -CO 2 Swap with Simulated IGCC Syngas

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  • Ya-Long Ding

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China
    College of Chemistry and Pharmaceutical Engineering, Huanghuai University, Zhumadian 463000, China)

  • Hua-Qin Wang

    (College of Chemistry and Pharmaceutical Engineering, Huanghuai University, Zhumadian 463000, China)

  • Chun-Gang Xu

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China
    CAS Key Laboratory of Gas Hydrate, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
    Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Xiao-Sen Li

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510641, China
    CAS Key Laboratory of Gas Hydrate, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
    Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China)

Abstract

To investigate the influence of CO 2 partial pressure on efficiency of CH 4 -CO 2 swap from natural gas hydrates (NGHs), the replacement of CH 4 from natural gas hydrate (NGH) is carried out with simulated Integrated Gasification Combined Cycle (IGCC) syngas under different pressures, and the gas chromatography (GC), in-situ Raman, and powder X-ray diffraction (PXRD) are employed to analyze the hydrate compositions and hydrate structures. The results show that with the P-T (pressure and temperature) condition shifting from that above the hydrate equilibrium curve of IGCC syngas to that below the hydrate equilibrium curve of IGCC syngas, the rate of CH 4 recovery drastically rises from 32% to 71%. The presence of water can be clearly observed when P-T condition is above the hydrate equilibrium curve of IGCC syngas; however the presence of water only occurs at the interface between gas phase and hydrate phase. No H 2 is found to present in the final hydrate phase at the end of process of CH 4 -CO 2 swap with IGCC syngas.

Suggested Citation

  • Ya-Long Ding & Hua-Qin Wang & Chun-Gang Xu & Xiao-Sen Li, 2020. "The Effect of CO 2 Partial Pressure on CH 4 Recovery in CH 4 -CO 2 Swap with Simulated IGCC Syngas," Energies, MDPI, vol. 13(5), pages 1-11, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1017-:d:324732
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    References listed on IDEAS

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    1. Koh, Dong-Yeun & Kang, Hyery & Lee, Jong-Won & Park, Youngjune & Kim, Se-Joon & Lee, Jaehyoung & Lee, Joo Yong & Lee, Huen, 2016. "Energy-efficient natural gas hydrate production using gas exchange," Applied Energy, Elsevier, vol. 162(C), pages 114-130.
    2. E. Dendy Sloan, 2003. "Fundamental principles and applications of natural gas hydrates," Nature, Nature, vol. 426(6964), pages 353-359, November.
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