Liquid carbon dioxide recovery from gas mixtures with methane

Details Liquid carbon dioxide recovery from gas mixtures with methane Liquid carbon dioxide recovery from gas mixtures with methane

F - Mech Eng,Light,Heat,Weapons

25

J

162/109

F25J 3/00 (2006.01) F25J 3/02 (2006.01) F25J 3/08 (2006.01)

Patent

CA 1295933

LIQUID CARBON DIOXIDE RECOVERY FROM GAS MIXTURES WITH METHANE A B S T R A C T Land-fill and other gases containing principally methane and carbon dioxide have been separated into high BTU fuel gas and discard carbon dioxide containing apprec- iable methane. Such discard gas can now be simply frac- tionated into high-purity liquid carbon dioxide with re- coveries in excess of 80% while using a single refrigerant at a single low temperature to satisfy all refrigeration requirements of fractionation. This novel fractionation is ideally combined with the process of separating land- fill gas into high BTU fuel gas because then the methane and carbon dioxide are recovered completely as two valuable products, high BTU fuel gas and pure liquid carbon dioxide.

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