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Title: Electrochemical separation and concentration of hydrogen sulfide from gas mixtures

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 -- or, in the case of H.sub.2 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.

Inventors:
 [1];  [2];  [3]
  1. (Atlanta, GA)
  2. (Naperville, IL)
  3. (Darian, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
875288
Patent Number(s):
RE31718
Application Number:
06/399,051
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electrochemical; separation; concentration; hydrogen; sulfide; gas; mixtures; method; removing; sulfur; oxides; temperature; 150; degree; -1000; subject; cell; employed; provided; inert; electrodes; electrolyte; provide; anions; compatible; containing; formed; anode; selected; stable; cations; temperatures; encountered; mixture; passed; cathode; gases; converted; s-; migrate; gaseous; form; levels; 10x; current; flow; effected; utilizing; external; source; electrical; energy; passing; reducing; past; reducing gas; removing sulfur; sulfur containing; sulfur oxide; temperature gas; sulfur oxides; inert electrode; gas mixtures; electrical energy; electrochemical cell; hydrogen sulfide; current flow; gas mixture; concentration levels; external source; stable gaseous; anions formed; gaseous form; sulfur gas; chemical separation; concentration level; stable gas; electrochemical separation; /205/

Citation Formats

Winnick, Jack, Sather, Norman F., and Huang, Hann S. Electrochemical separation and concentration of hydrogen sulfide from gas mixtures. United States: N. p., 1984. Web.
Winnick, Jack, Sather, Norman F., & Huang, Hann S. Electrochemical separation and concentration of hydrogen sulfide from gas mixtures. United States.
Winnick, Jack, Sather, Norman F., and Huang, Hann S. Tue . "Electrochemical separation and concentration of hydrogen sulfide from gas mixtures". United States. https://www.osti.gov/servlets/purl/875288.
@article{osti_875288,
title = {Electrochemical separation and concentration of hydrogen sulfide from gas mixtures},
author = {Winnick, Jack and Sather, Norman F. and Huang, Hann S.},
abstractNote = {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 -- or, in the case of H.sub.2 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {10}
}

Patent:

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