Compression of carbon dioxide containing fluid
View Patent ↗The present invention relates to a method of pressurizing a fluid comprising carbon dioxide, the method includes: obtaining the fluid from a unit for removing carbon dioxide from a process gas; compressing the fluid to a pressure above the critical pressure of carbon dioxide; and cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid. The invention further relates to an apparatus for pressurizing a fluid comprising carbon dioxide, the apparatus including: means for obtaining the fluid from a unit for removing carbon dioxide from a process gas; means for compressing the fluid to a pressure above the critical pressure of carbon dioxide; and means for cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid.
1. A method of pressurizing a fluid comprising carbon dioxide, the method comprising:
obtaining the fluid from a unit for removing carbon dioxide from a process gas;
compressing the fluid to a pressure above the critical pressure of carbon dioxide, the fluid being compressed to a pressure within the range of 9-12 MPa; and
cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid; and
wherein the fluid is compressed and cooled such that the compressed and cooled fluid is a one phase supercritical fluid.
2. The method according to claim 1 , further comprising: pumping the supercritical fluid.
3. The method according to claim 1 , wherein in the compressing of the fluid, the fluid is compressed to a pressure within the range of 9-12 MPa.
4. The method according to claim 1 , wherein the compressed and cooled fluid has a density of at least 600 kg/m3.
5. The method according to claim 1 , wherein the fluid comprises at least 92 mol-% carbon dioxide.
6. The method according to claim 1 , wherein the fluid comprises at most 99.9 mol-% carbon dioxide.
7. The method according to claim 6 , wherein the fluid comprises at least 0.1 mol-%, of impurities, the impurities comprising at least one of Ar, N 2 , O 2 , SO X , NO X , H 2 O, H 2 and CH 4 .
8. The method according to claim 1 , wherein the obtained fluid is a flue gas from an oxy-combustion power plant.
9. The method of claim 1 , wherein the fluid comprises at least 80 mol-% carbon dioxide.
10. The method of claim 9 , wherein the fluid also comprises at least 1 mol-% of impurities, the impurities comprising at least one of Ar, N 2 , O 2 , SO X , NO X , H 2 O, H 2 and CH 4 .
11. A method of pressurizing a fluid comprising carbon dioxide, the method comprising:
obtaining the fluid from a unit for removing carbon dioxide from a process gas, the fluid comprising at least 80 mol-% carbon dioxide and at most 90 mol-% carbon dioxide;
compressing the fluid to a pressure above the critical pressure of carbon dioxide; and
cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid; and
wherein the fluid is compressed and cooled such that the compressed and cooled fluid is a one phase supercritical fluid.