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US 6,280,505 B1Granted
Separation of acid gases from gas mixtures
AssigneeDen Norske Stats Oljeselskap A.S.
InventorsBernt H. Torkildsen, Martin Sigmundstad, Harald Linga, Finn P. Nilsen, Per H. Hanssen
Life of this patent
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Abstract
A method for removing acid gas components from combustion gas and natural gas. The method includes bringing the gas mixture into contact with sea water and subjecting the gas mixture and sea water to turbulent mixing conditions. This causes the acid gas to be absorbed by the sea water. The sea water can be disposed of offshore without any detrimental effect on the environment.
Claims12
A method of removing acid gas components from a gas mixture which comprises:
- bringing the gas mixture into contact with sea water;
- subjecting the gas mixture and sea water to turbulent mixing conditions thereby causing the acid gas to be absorbed by the sea water;
- and separating gas phase and a liquid phase, in which the acid gases absorbed include H2S and NOx and further in which, after absorption, the sea water is treated with a reagent to react with the H2S, the NOx, or both the H2S and the NOx.
A method of removing acid gas components from a gas mixture which comprises:
- bringing the gas mixture into contact with sea water;
- subjecting the gas mixture and sea water to turbulent mixing conditions thereby causing the acid gas to be absorbed by the sea water;
- and separating gas phase and a liquid phase in which the mixing is carried out in a turbulent contactor including a gas inlet, a liquid inlet, an outlet leading to a venturi passage and a tube extending from the outlet back upstream, the tube being perforated and/or being spaced from the periphery of the outlet.
Dependencies are inferred from the claim text.