SET Proceedings 2978-4387 Caravel Press 10.65582/set.2008.237 2008.237 Gas hydrate formation process for pre-combustion capture of carbon dioxide LeeHyun Ju LeeBoram KangKyung Chan LeeJin Woo KimYoung Seok LeeJu Dong EnglezosPeter englezos@interchange.ubc.ca KimYang Do School of Materials Science and Engineering, Pusan National University, Busan, Korea Korea Institute of Industrial Technology, Busan, Korea Department of Chemical and Biological Engineering, University of British Columbia, Canada 24082008 7 1 978-1-995850-08-5 1708 1713 24 August 2008 © 2008 Copyright WSSET 2008

A new process is proposed for the CO2 separation/recovery of gas mixture. It is based on gas hydrate crystallization. In this study, gas hydrate from CO2/H2 gas mixtures was formed in a semi-batch stirred vessel at constant pressure and temperature. This mixture is of interest to CO2 separation and recovery from Integrated Coal Gasification (IGCC) plants. During hydrate formation the gas uptake was determined and composition changes in the gas phase were obtained by gas chromatography. The impact of Tetrahydrofuran (THF) and Sulfur hexafluoride (SF6) on hydrate formation from the CO2/H2 were observed. The addition of THF or SF6 not only reduced significantly the equilibrium formation conditions but also helped to form hydrates easier. The present study illustrates the concept and provides basic for the separation/recovery of CO2 (pre-combustion capture) from a fuel gas (CO2/H2) mixture.

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