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Received April 9, 2015
Accepted May 13, 2015
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Separation of CO2 from flue gases using hydroquinone clathrate compounds
Department of Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan-si, Chungnam 331-717, Korea 1IT Convergence Materials R&D Group, Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Ipjang-myeon, Cheonan-si, Chungnam 331-822, Korea 2Department of Energy and Resources Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 606-791, Korea
Korean Journal of Chemical Engineering, December 2015, 32(12), 2507-2511(5), 10.1007/s11814-015-0101-3
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Abstract
Hydroquinone (HQ) samples reacting with (CO2+N2) gas mixtures with various compositions at pressures ranging from 10 to 50 bar are analyzed using spectroscopic methods and an elemental analyzer. The results indicate that while both CO2 and N2 can react with HQ to form clathrate compounds, CO2 has higher selectivity than N2. In particular, at an operating pressure of 20 bar or greater, the CO2 content in the clathrate compound is 85mol% or higher regardless of the feed gas composition. Moreover, if a two-step clathrate-based process is adapted, CO2 at a rate of 93 mol% or higher can be recovered from flue gases. Thus, the clathrate compound described here can be used as a CO2 separation/recovery medium for CO2 in flue gases.
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References
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