Method and apparatus for sequestering carbon dioxide in the deep ocean or aquifers

A system for sequestering carbon dioxide in deep water comprising:

• a. a source of gaseous carbon dioxide;
• b. a source of seawater at a depth of greater than 500 meters and a temperature of about 0.degree. to 10.degree. C.
• c. a compressor in fluid communication with said gaseous carbon dioxide for compressing said carbon dioxide;
• d. a heat exchanger in fluid communication with said compressor for receiving and precooling said compressed carbon dioxide;
• e. a refrigeration unit in fluid communication with said heat exchanger for receiving and subcooling said precooled, compressed carbon dioxide to at temperature between approximately 0.degree. C. and -30.degree. C.;
• e. a clathrate reactor vessel in fluid communication with said refrigeration unit for receiving said sub-cooled carbon dioxide from said refrigeration unit;
• f. means for transporting and splitting said cold seawater into first and second streams, said first stream to feed said clathrate reactor for production of clathrates and said second stream for precooling said carbon dioxide and transporting said clathrates as a slurry to depths greater than 500 meters;
• g. means for mixing said subcooled carbon dioxide and said seawater in said clathrate reactor vessel thereby forming clathrates;
• and
• h. means for transporting said clathrates to a depth greater than 500 meters in said seawater;
• whereby said seawater is used to precool gaseous carbon dioxide which is then subcooled and mixed with cold seawater to form clathrates which are deposited in the deep water at a depth greater than 500 meters to sequester said carbon dioxide.