Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1977-07-20
1979-04-03
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423226, 423229, 423232, 423573G, 55 16, B01D 5334
Patent
active
041477545
ABSTRACT:
Hydrogen sulfide is removed from a mixture of gases including carbon dioxide by passing the mixture over an immobilized liquid membrane in intimate contact with a hydrophobic, microporous gas, permeable barrier and absorbing in a liquid solution hydrogen sulfide passing through the membrane. In a sweep of hot carbonate solution, a nearly stagnant boundary layer adjacent the gas permeable barrier absorbs acid gases by reaction and diffusion, maintaining low hydrogen sulfide partial pressure at the outlet side of the barrier. Alternatively, the sweep may comprise an aqueous solution containing a redox agent which converts absorbed hydrogen sulfide into sulfur, or an ethanol amine solution. The apparatus exhibits low permeability to carbon dioxide and high permeability to hydrogen sulfide.
REFERENCES:
patent: 3244763 (1966-04-01), Cohn
patent: 3396510 (1968-08-01), Ward et al.
patent: 3624983 (1971-12-01), Ward
patent: 3819806 (1974-06-01), Ward et al.
patent: 3926561 (1975-12-01), Lucero
Cohen Joseph T.
General Electric Company
Herkamp Nathan D.
MaLossi Leo I.
Thomas Earl C.
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