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Energy efficient solvent regeneration process for carbon dioxide capture

United States Patent

February 27, 2018
View the Complete Patent at the US Patent & Trademark Office
A process for removing carbon dioxide from a carbon dioxide-loaded solvent uses two stages of flash apparatus. Carbon dioxide is flashed from the solvent at a higher temperature and pressure in the first stage, and a lower temperature and pressure in the second stage, and is fed to a multi-stage compression train for high pressure liquefaction. Because some of the carbon dioxide fed to the compression train is already under pressure, less energy is required to further compress the carbon dioxide to a liquid state, compared to conventional processes.
Zhou; Shaojun (Palatine, IL), Meyer; Howard S. (Hoffman Estates, IL), Li; Shiguang (Mount Prospect, IL)
Gas Technology Institute (Des Plaines, IL)
14/ 549,954
November 21, 2014
This invention was made with government support under Contract No. DE-FE 0012829 awarded by the United States Department of Energy. The government has certain rights in the invention.