Patent ID: 8915987

Claim:
A method for capturing carbon dioxide from a source gas stream, comprising the steps of: (a) providing a source gas stream including carbon dioxide; (b) admitting the source gas stream to a vessel containing a quantity of a perfluorocarbon absorbent preferentially absorbing carbon dioxide without necessity of a chemical reaction between the absorbent and carbon dioxide; (c) allowing the absorbent to become saturated with carbon dioxide from the source gas stream, while allowing the remainder of the source gas stream to escape from the vessel; (d) monitoring the carbon dioxide content of the escaping gas stream; (e) when the monitored carbon dioxide content of the escaping gas stream indicates that carbon dioxide is present in the escaping gas stream, ceasing admission of the source gas stream into the vessel; (f) causing the carbon dioxide to be desorbed from the saturated absorbent by providing negative pressure using a vacuum pump without necessity of a chemical reaction between the absorbent and carbon dioxide; and (g) collecting the desorbed carbon dioxide.