Electrochemical separation and concentration of sulfur containing gases from gas mixtures
USRE31778E · kind E · reissue
Inventor
Key dates
| Filing date | Jul 16, 1982 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Jul 16, 2002 |
Classification
- Technology area (CPC —)General
Abstract
A method of removing sulfur oxides of H.sub.2 S from high temperature gas mixtures (150.degree.-1000.degree. 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 SO.sub.4 .dbd. or, in the case of H.sub.2 S, to S.dbd.. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.