Dehydration of carbon dioxide

A system for purifying a carbon dioxide feed stream comprising:

• a first heat exchanger configured to receive the carbon dioxide feed stream and produce a cooled carbon dioxide stream;
• a first separator configured to receive the cooled carbon dioxide stream and produce an overhead vapor stream and an aqueous bottoms stream;
• an adsorber configured to receive the overhead vapor stream and produce a dry carbon dioxide stream;
• a second heat exchanger configured to receive the dry carbon dioxide stream and produce a cold carbon dioxide stream;
• a cold separator configured to receive the cold carbon dioxide stream and produce a cold vent stream and a cold carbon dioxide liquid stream;
• a pressure reducer configured to receive at least a portion of the cold carbon dioxide liquid stream and produce a low-pressure carbon dioxide stream;
• wherein the first heat exchanger and the second heat exchanger are in fluid flow communication with one or more of at least a portion of the cold carbon dioxide liquid stream, at least a portion of the cold vent stream, and at least a portion of the low-pressure carbon dioxide stream.