Removing sulphur oxides from a fluid stream
Patent
·
OSTI ID:1129174
A process for removing sulphur oxides from a fluid stream, such as flue gas, comprising: providing a non-aqueous absorption liquid containing at least one hydrophobic amine, the liquid being incompletely miscible with water; treating the fluid stream in an absorption zone with the non-aqueous absorption liquid to transfer at least part of the sulphur oxides into the non-aqueous absorption liquid and to form a sulphur oxide-hydrophobic amine-complex; causing the non-aqueous absorption liquid to be in liquid-liquid contact with an aqueous liquid whereby at least part of the sulphur oxide-hydrophobic amine-complex is hydrolyzed to release the hydrophobic amine and sulphurous hydrolysis products, and at least part of the sulphurous hydrolysis products is transferred into the aqueous liquid; separating the aqueous liquid from the non-aqueous absorption liquid. The process mitigates absorbent degradation problems caused by sulphur dioxide and oxygen in flue gas.
- Research Organization:
- Research Triangle Institute, Research Triangle Park, NC (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AR0000093
- Assignee:
- BASF SE (DE); Research Triangle Institute (Research Triangle Park, NC)
- Patent Number(s):
- 8,691,171
- Application Number:
- 13/782,290
- OSTI ID:
- 1129174
- Country of Publication:
- United States
- Language:
- English
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