Progress on the selective removal of H/sub 2/S from gasified coal by using an immobilized liquid membrane
A recent development in selective removal utilized aqueous carbonate solutions in the form of an immobilized liquid bicarbonate/carbonate ion membrane through which facilitated hydrogen sulfide transport took place. The relatively high permeability of the membrane to hydrogen sulfide at 90/sup 0/ to 130/sup 0/C and at 300 atm total feed-gas pressure appears promising for industrial application under similar operating conditions. In the study, a 30% potassium carbonate solution is immobilized by impregnating it in a microporous hydrophilic polymer membrane, and gas gaps are formed by interposing microporous Teflon pads between successive membranes. The immobilized membrane scrubbing system provides a selectivity for hydrogen sulfide/carbon dioxide mixtures that is superior to that of conventional hot carbonate scrubbers.
- OSTI ID:
- 6616637
- Journal Information:
- Ind. Eng. Chem., Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem., Process Des. Dev.; (United States) Vol. 16:3; ISSN IEPDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ACID CARBONATES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
DESULFURIZATION
ENERGY SOURCES
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MEMBRANE TRANSPORT
OXYGEN COMPOUNDS
REMOVAL
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES