Patent ID: 7935178
Filing Date: 2011-05-03
Classification: B01D,Y02A,Y02C

Abstract:
1. A process for treating a carbon dioxide containing gas comprising the steps of: a) contacting the gas with a solvent in an absorber unit absorbing impurities so as to obtain an impurity-laden solvent and a scrubbed gas; b) sending the impurity-laden solvent through a carbon dioxide recycle flash drum removing a portion of carbon dioxide that is then compressed, cooled and recirculated to the absorber unit; c) expanding the impurity-laden solvent through a biphasic turbine so as to release an amount of the impurities in gaseous form and to obtain an impurity-depleted solvent for producing a semi-lean solvent stream; and d) recirculating the semi-lean solvent stream to the absorber unit.