Electrochemical separation and concentration of hydrogen sulfide from gas mixtures

Patent · Tue Oct 30 00:00:00 EST 1984

OSTI ID:875288

Winnick, Jack ^[1]; Sather, Norman F ^[2]; Huang, Hann S ^[3]

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1. Atlanta, GA
2. Naperville, IL
3. Darian, IL

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US RE31718
• Application Number: 06/399,051
• OSTI ID: 875288
• Country of Publication: United States
• Language: English

Related Subjects

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/