METHOD FOR SEPARATING A CLEANED USEFUL GAS FROM A GAS MIXTURE, AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

A method is provided for separating a cleaned useful gas from a gas mixture substantially containing carbon dioxide, at least one useful gas, and at least one hazardous substance. The carbon dioxide is condensed, and the liquid carbon dioxide that is enriched with the hazardous substance is separated from the useful gas. The hazardous material is then separated from the liquid carbon dioxide by adsorption, and one part of the cleaned liquid carbon dioxide is fed into the useful gas to absorb hazardous substances still contained in the useful gas.