CRYOGENIC CARBON CAPTURE SYSTEM AND METHOD WITH INTEGRATED LIQUID NATURAL GAS VAPORIZER

Claims

A desublimation heat exchanger receives a cooled process gas stream from a precooling heat exchanger and includes a clean gas outlet, a contact liquid inlet, and a slurry outlet. A contact liquid heat exchanger communicates with the contact liquid inlet of the desublimation heat exchanger and heats a stream of liquid natural gas to provide cooling within the contact liquid heat exchanger. The desublimation heat exchanger contacts the cooled process gas stream with the cooled contact liquid, so that carbon dioxide is absorbed into the contact liquid, thus forming a carbon dioxide-laden slurry stream and a clean process gas stream reduced in carbon dioxide.The clean process gas stream passes through the clean gas outlet to the precooling heat exchanger, and the slurry stream passes through the slurry outlet. The precooling heat exchanger heats the clean process gas stream to provide cooling to the process gas stream. A solids separation device communicates with the contact inlet of the desublimation heat exchanger and separates the carbon dioxide-laden slurry stream from the desublimation heat exchanger into a condensed carbon dioxide stream and a contact liquid stream.