Separation of hydrogen sulfide from gas mixture including carbon

Details Separation of hydrogen sulfide from gas mixture including carbon Separation of hydrogen sulfide from gas mixture including carbon

1977-05-11

1978-09-19

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423210, 55 16, B01D 5334

Patent

active

041155149

ABSTRACT:
Hydrogen sulfide is removed from a mixture of gases including carbon dioxide by passing the mixture over an assembly comprising a pair of immobilized liquid membranes of carbonate/bicarbonate solution separated by a gas permeable barrier of hydrophobic microporous material. Because hydrogen sulfide transport through the membranes is diffusion limited while carbon dioxide transport therethrough is reaction rate limited, the assembly exhibits reduced permeability to carbon dioxide and essentially unchanged high permeability to hydrogen sulfide compared to a single immobilized liquid membrane of thickness equal to total thickness of the membranes in the assembly. Hydrogen sulfide thus passes through the assembly more selectively than carbon dioxide.

REFERENCES:
patent: 3624983 (1971-12-01), Ward et al.
patent: 3819806 (1974-06-01), Ward et al.

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