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Experimental Investigation of the Hydrate-Based Gas Separation of Synthetic Flue Gas with 5A Zeolite

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  • Xiaoya Zang

    (Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, 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
    State Key Laboratory of Natural Gas Hydrate, Beijing 100028, China)

  • Na Zhang

    (Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Xuebing Zhou

    (Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, 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
    State Key Laboratory of Natural Gas Hydrate, Beijing 100028, China)

  • Lihua Wan

    (Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, 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
    State Key Laboratory of Natural Gas Hydrate, Beijing 100028, China)

  • Deqing Liang

    (Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, 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
    State Key Laboratory of Natural Gas Hydrate, Beijing 100028, China)

Abstract

Coal combustion flue gas contains CO 2 , a greenhouse gas and driver of climate change. Therefore, CO 2 separation and removal is necessary. Fortunately, 5A zeolites are highly porous and can be used as a CO 2 adsorbent. In addition, they act as nuclei for hydrate formation. In this work, a composite technology, based on the physical adsorption of CO 2 by 5A zeolite and hydrate-based gas separation, was used to separate CO 2 /N 2 gas mixtures. The influence of water content, temperature, pressure, and particle size on gas adsorption and CO 2 separation was studied, revealing that the CO 2 separation ability of zeolite particles sized 150–180 μm was better than that of those sized 380–830 μm at 271.2 K and 273.2 K. When the zeolite particles were 150–180 μm (type-B zeolite) with a water content of 35.3%, the gas consumption per mole of water ( n g a s / n H 2 O ) reached the maximum, 0.048, and the CO 2 separation ratio reached 14.30%. The CO 2 molar concentration in the remaining gas phase ( x C O 2 g a s ) was lowest at 271.2 K in the type-B zeolite system with a water content of 47.62%. Raman analysis revealed that CO 2 preferentially occupied the small hydrate cages and there was a competitive relationship between N 2 and CO 2 .

Suggested Citation

  • Xiaoya Zang & Na Zhang & Xuebing Zhou & Lihua Wan & Deqing Liang, 2020. "Experimental Investigation of the Hydrate-Based Gas Separation of Synthetic Flue Gas with 5A Zeolite," Energies, MDPI, vol. 13(17), pages 1-12, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4556-:d:407985
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    References listed on IDEAS

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    1. Kim, Soyoung & Choi, Sung-Deuk & Seo, Yongwon, 2017. "CO2 capture from flue gas using clathrate formation in the presence of thermodynamic promoters," Energy, Elsevier, vol. 118(C), pages 950-956.
    2. Wang, Xiaolin & Zhang, Fengyuan & Lipiński, Wojciech, 2020. "Research progress and challenges in hydrate-based carbon dioxide capture applications," Applied Energy, Elsevier, vol. 269(C).
    3. Liu, Jun & Ding, Jia-Xiang & Liang, De-Qing, 2018. "Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed," Energy, Elsevier, vol. 157(C), pages 54-64.
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