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Solid sorbents for removal of carbon dioxide from gas streams at low temperatures

United States Patent

June 21, 2005
View the Complete Patent at the US Patent & Trademark Office
National Energy Technology Laboratory - Visit the Technology Transfer Website
New low-cost CO.sub.2 sorbents are provided that can be used in large-scale gas-solid processes. A new method is provided for making these sorbents that involves treating substrates with an amine and/or an ether so that the amine and/or ether comprise at least 50 wt. percent of the sorbent. The sorbent acts by capturing compounds contained in gaseous fluids via chemisorption and/or physisorption between the unit layers of the substrate's lattice where the polar amine liquids and solids and/or polar ether liquids and solids are located. The method eliminates the need for high surface area supports and polymeric materials for the preparation of CO.sub.2 capture systems, and provides sorbents with absorption capabilities that are independent of the sorbents' surface areas. The sorbents can be regenerated by heating at temperatures in excess of C.
Sirwardane; Ranjani V. (Morgantown, WV)
The United States of America as represented by the Department of Energy (Washington, DC)
10/ 420,713
April 23, 2003
CONTRACTUAL ORIGIN OF INVENTION The United States Government has rights in this invention pursuant to an employer-employee relationship between the inventor and the U.S. Department of Energy.