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

Sang Jun Yoon, Dongwon Lee, Ji-Ho Yoon and Jong-Won Lee
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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

Energies, 2020, vol. 13, issue 14, 1-10

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).

Keywords: hydroquinone; clathrate compounds; syngas; carbon dioxide; carbon monoxide (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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