Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Patent
1995-03-27
1996-09-17
Spitzer, Robert
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
95 51, 423229, 423232, B01D 5322, B01D 5314
Patent
active
055564496
ABSTRACT:
Improved processes for treating gas streams containing hydrogen sulfide and carbon dioxide, particularly gas streams from fossil fuel gasification processes. The processes rely on the availability of a membrane that maintains high hydrogen sulfide/methane selectivity and adequate hydrogen sulfide/carbon dioxide selectivity when measured with multicomponent gas mixtures at high pressure. The processes have three steps: an acid gas removal step, to remove both hydrogen sulfide and carbon dioxide from the primary gas stream; a membrane fractionation step, to separate hydrogen sulfide from carbon dioxide and create a highly hydrogen-sulfide-concentrated fraction; and a sulfur-fixing step.
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Baker Richard W.
Lokhandwala Kaaeid A.
Farrant J.
Membrane Technology and Research, Inc.
Spitzer Robert
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