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Process for separating carbon dioxide from flue gas using sweep-based membrane separation and absorption steps

United States Patent

8,246,718
August 21, 2012
View the Complete Patent at the US Patent & Trademark Office
A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to an absorption-based carbon dioxide capture step, while simultaneously flowing a second portion of the flue gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas to the combustor.
Wijmans; Johannes G. (Menlo Park, CA), Baker; Richard W. (Palo Alto, CA), Merkel; Timothy C. (Menlo Park, CA)
Membrane Technology and Research, Inc (Newark, CA)
13/ 123,342
September 13, 2010
This invention was made in part with U.S. Government support under SBIR Award No. DE-NT-000-5312, awarded by the U.S. Department of Energy. The U.S. Government has certain rights in this invention.