Electrochemical conversion of CO sub 2 and CH sub 4 to C sub 2 hydrocarbons in a single cell
This patent describes a process for concurrent gas phase electrocatalytic oxidative dimerization of methane at the anode on one side of a solid electrolyte and reduction of carbon dioxide to gaseous hydrocarbons at a cathode on the other side of the solid electrolyte. It comprises passing methane containing gas in contact with a rare earth metallic oxide anode layer of an anode comprising a rare earth metallic oxide anode layer in contact with one side of an ionic and electronic conducting metallic oxide perovskite anode layer in contact with one side of a solid electrolyte on its opposite side, the anode catalytically oxidatively dimerizing the methane to C{sub 2} species; transferring through the solid electrolyte an ionic species selected from the group consisting of an O{sup 2}-species from the cathode to the anode and a proton mediating ion from the anode to the cathode at cell operating temperatures; passing carbon dioxide containing gas in contact with one side of an ionic and electronic conducting metal cathode electrocatalyst capable of providing adsorption sites for carbon dioxide and chemisorbed and faradaically generated hydrogen species in proximity to the adsorbed carbon dioxide and capable of catalytic reduction of the carbon dioxide to predominantly C{sub 2} species; and withdrawing the C{sub 2} species from the region of the anode and the cathode.
- Assignee:
- Gas Research Inst., Chicago, IL (United States)
- Patent Number(s):
- US 5064733; A
- Application Number:
- PPN: US 7-491989
- OSTI ID:
- 5768883
- Country of Publication:
- United States
- Language:
- English
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Mass Transfer & Thermodynamics
ALKANES
ANODES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
DIMERIZATION
DIRECT ENERGY CONVERTERS
ELECTROCATALYSTS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
FUEL CELLS
HYDROCARBONS
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYMERIZATION
REDUCTION
SOLID ELECTROLYTE FUEL CELLS