Gas phase CO.sub.2 reduction to hydrocarbons at solid polymer el

Details Gas phase CO.sub.2 reduction to hydrocarbons at solid polymer el Gas phase CO.sub.2 reduction to hydrocarbons at solid polymer el

1988-10-14

1990-09-25

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 73R, 204252, 204282, 204290R, 204292, C25B 304

Patent

active

049591312

ABSTRACT:
A process and apparatus for gas phase electrochemical reduction of CO.sub.2 and/or CO to hydrocarbons at ambient temperatures. The process is carried out by passing an electrical current between a cathode in contact with one side of a hydrogen ion conducting solid polymer electrolyte and an anode in ionic communication with the opposite side of the solid polymer electrolyte. In one embodiment, the anode material may be in contact with the opposite side of the hydrogen ion conducting solid polymer electrolyte, and in another embodiment, an anode may be separated from the opposite side of the solid polymer electrolyte by an aqueous inorganic salt solution. At least one of CO.sub.2 and CO are passed in contact with the cathode and hydrogen ions passing through the solid polymer electrolyte reduce at least a portion of the CO.sub.2 and CO to gaseous hydrocarbon products such as CH.sub.4 and C.sub.2 H.sub.4 at the solid polymer electrolyte/cathode interface.

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