Method for the production of carbon dioxide hydrates

A method for the production of CO.sub.2 hydrates from CO.sub.2 and water, said method comprising:

• dissolving a first stream of gaseous CO.sub.2 in water, resulting in a CO.sub.2 hydrate precursor, wherein said CO.sub.2 is pressurized to a pressure ranging from 10 to 20 atm and cooled to a temperature ranging from 0.degree. to -30.degree. C., and said water has a temperature ranging from -1.5.degree. to 0.degree. C.;
• and then
• mixing said CO.sub.2 hydrate precursor with a second stream of CO.sub.2 gas with agitation in a hydrate production step, wherein said CO.sub.2 gas is pressurized to a pressure ranging from 10 to 20 atm;
• wherein CO.sub.2 hydrates are produced.

A method for sequestering CO.sub.2 comprising:

• compressing CO.sub.2 gas to a pressure of 10 to 20 atmospheres;
• cooling said compressed CO.sub.2 to a temperature ranging from 0.degree. to -30.degree. C.;
• cooling water to a temperature of about 0.degree. C., said water being obtained from a source wherein said water is present at a temperature of less than about 10.degree. C.;
• dissolving a first stream of said cooled, pressurized CO.sub.2 in said cooled water, resulting in a CO.sub.2 hydrate precursor;
• and then
• mixing said CO.sub.2 hydrate precursor with a second stream of cooled, pressurized CO.sub.2 gas with agitation in a hydrate production step, resulting in CO.sub.2 hydrate production;
• and
• depositing said hydrates in a high pressure, low temperature environment;
• wherein said CO.sub.2 is sequestered.