method for removal of a first selected contaminant of oxygen and carbon monoxide from impure liquid carbon dioxide, and method for recovery of carbon dioxide from contaminated carbon dioxide gas

摘要

METHOD FOR REMOVAL OF A FIRST SELECTED CARBON DIOXIDE CARBON OXYGEN OXYGEN AND MONOXIDE CONTAMINANT AND CARBON DIOXIDE GAS CARBON DIOXIDE RECOVERY METHOD It is a first selected contaminant of oxygen and carbon monoxide, which is removed from impure liquid carbon dioxide by use of a mass transfer separation column system, which is referred to by indirect thermal exchange against carbon dioxide fluid. raw carbon, where impure liquid carbon dioxide has a higher carbon dioxide concentration than that of raw carbon dioxide fluid. The invention finds particular application in the recovery of carbon dioxide from flue gas generated in an oxyfuel combustion process or effluent gas from a PSA hydrogen adsorption process. Advantages include reducing the level of the first contaminant to no more than 1000 ppm.