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The clathrate hydrate process for post and pre-combustion capture of carbon dioxide
Praveen Linga1, Rajnish Kumar, Peter Englezos
1Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, Canada V6T 1Z3.
Abstract:
One of the new approaches for capturing carbon dioxide from treated flue gases (post-combustion capture) is based on gas hydrate crystallization. The basis for the separation or capture of the CO(2) is the fact that the carbon dioxide content of gas hydrate crystals is different than that of the flue gas. When a gas mixture of CO(2) and H(2) forms gas hydrates the CO(2) prefers to partition in the hydrate phase. This provides the basis for the separation of CO(2) (pre-combustion capture) from a fuel gas (CO(2)/H(2)) mixture. The present study illustrates the concept and provides basic thermodynamic and kinetic data for conceptual process design. In addition, hybrid conceptual processes for pre and post-combustion capture based on hydrate formation coupled with membrane separation are presented.
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