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Guest Partitioning and High CO 2 Selectivity in Hydroquinone Clathrates Formed from Ternary (CO + CO 2 + H 2 ) Gas Mixtures

Author

Listed:
  • Sang Jun Yoon

    (Clean Fuel Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Dongwon Lee

    (Department of Environmental Engineering, Kongju National University, Chungnam 31080, Korea)

  • Ji-Ho Yoon

    (Department of Energy and Resources Engineering, Korea Maritime and Ocean University, Busan 49112, Korea)

  • Jong-Won Lee

    (Department of Environmental Engineering, Kongju National University, Chungnam 31080, Korea)

Abstract

Clathrate formation and guest behaviors in hydroquinone (HQ) clathrates were investigated for the first time using ternary (CO + CO 2 + H 2 ) gas mixtures. Two gas compositions (low and high CO 2 concentrations) were used to simulate synthesis gases generated from various sources. After reaction at 2.0, 4.0, and 6.0 MPa, the conversion yield of pure HQ to the clathrate form reached >90% if the CO 2 partial pressure was 0.7 MPa or higher. In addition, CO 2 was the most abundant occupant, whereas CO was only detectable at higher CO concentrations and experimental pressures. The separation efficiency values expressed as molar ratios of CO 2 to CO in the solid clathrate form were found to be 12.7 and 23.9 MPa at 4.0 and 6.0 MPa, respectively. The experimental and the calculated results in this study provide information useful for the design of a clathrate-based separation process for synthesis gases from various sources (i.e., synthesis gases with various compositions).

Suggested Citation

  • Sang Jun Yoon & Dongwon Lee & Ji-Ho Yoon & Jong-Won Lee, 2020. "Guest Partitioning and High CO 2 Selectivity in Hydroquinone Clathrates Formed from Ternary (CO + CO 2 + H 2 ) Gas Mixtures," Energies, MDPI, vol. 13(14), pages 1-10, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3591-:d:383541
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    Cited by:

    1. Ji-Ho Yoon & Dongwon Lee & Jong-Won Lee, 2021. "Spectroscopic Identification on CO 2 Separation from CH 4 + CO 2 Gas Mixtures Using Hydroquinone Clathrate Formation," Energies, MDPI, vol. 14(14), pages 1-9, July.

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