Electrochemical separation and concentration of hydrogen sulfide from gas mixtures
A method of removing sulfur oxides of H2 S from high temperature gas mixtures (150°-1000°C.) is the subject of the present invention. An electrochemical cell is employed. The cell is provided with inert electrodes and an electrolyte which will provide anions compatible with the sulfur containing anions formed at the anode. The electrolyte is also selected to provide inert stable cations at the temperatures encountered. The gas mixture is passed by the cathode where the sulfur gases are converted to SO4 -- or, in the case of H2 S, to S--. The anions migrate to the anode where they are converted to a stable gaseous form at much greater concentration levels (>10X). Current flow may be effected by utilizing an external source of electrical energy or by passing a reducing gas such as hydrogen past the anode.
- Research Organization:
- US Dept. of Energy (USDOE), Washington, DC (United States)
- Sponsoring Organization:
- USDOE
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Number(s):
- RE31718
- Application Number:
- 06/399051
- OSTI ID:
- 1176686
- Resource Relation:
- Patent File Date: 1982 Jul 16
- Country of Publication:
- United States
- Language:
- English
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