| 摘要 |
<p>A process for the recovery of carbon dioxide from a gas mixture in which it is of a concentration not greater than the equilibrium concentration at the freezing temperature of the mixture, comprising (i) concentrating the carbondioxide to a level between its equilibrium concentration and 98% by volume of the mixture by membrane separation and (ii) thereafter distilling the concentrate at sub-ambient temperature and recovering carbon dioxide as a liquid bottoms product of the distillation.</p> |
