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Membrane loop process for separating carbon dioxide for use in gaseous form from flue gas

United States Patent

September 6, 2016
View the Complete Patent at the US Patent & Trademark Office
The invention is a process involving membrane-based gas separation for separating and recovering carbon dioxide emissions from combustion processes in partially concentrated form, and then transporting the carbon dioxide and using or storing it in a confined manner without concentrating it to high purity. The process of the invention involves building up the concentration of carbon dioxide in a gas flow loop between the combustion step and a membrane separation step. A portion of the carbon dioxide-enriched gas can then be withdrawn from this loop and transported, without the need to liquefy the gas or otherwise create a high-purity stream, to a destination where it is used or confined, preferably in an environmentally benign manner.
Wijmans; Johannes G (Menlo Park, CA), Baker; Richard W (Palo Alto, CA), Merkel; Timothy C (Menlo Park, CA)
14/ 477,633
September 4, 2014
STATEMENT OF GOVERNMENTAL SUPPORT The 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.