CARBON DIOXIDE PRODUCTION FROM NON-CONVENTIONAL LOW CONCENTRATION FEED SOURCES

摘要

A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recycled to the carbon dioxide feed, and a system for recovering spent carbon dioxide from a refrigeration system using liquid carbon dioxide as a freezing agent. CAN/dal 5007Z-20