2008

Electrocatalytic Reduction of Carbon Dioxide to Methane

A room-temperature electrocatalytic process that effects the overall chemical reaction CO2 + 2H2O → CH4 + 2O2 has been investigated as a means of removing carbon dioxide from air and restoring oxygen to the air. The process was originally intended for use in a spacecraft life-support system, in which the methane would be vented to outer space. The process may also have potential utility in terrestrial applications in which either or both of the methane and oxygen produced might be utilized or vented to the atmosphere.

A typical cell used to implement the process includes a polymer solid-electrolyte membrane, onto which are deposited cathode and anode films. The cathode film is catalytic for electrolytic reduction of CO2 at low overpotential. The anode film is typically made of platinum. When CO2 is circulated past the cathode, water is circulated past the anode, and a suitable potential is applied, the anode half-cell reaction is 4H2O → 2O2 + 8H+ + 8e. The H+ ions travel through the membrane to the cathode, where they participate in the half-cell reaction CO2 + 8H+ + 8e→CH4 + 2H2O.

This work was done by Anthony F. Sammells and Ella F. Spiegel of Eltron Research, Inc. for Johnson Space Center.
MSC-23097-1

This Brief includes a Technical Support Package (TSP).

Electrocatalytic Reduction of Carbon Dioxide to Methane (reference MSC-23097-1) is currently available for download from the TSP library.

Please Login at the top of the page to download.

 

White Papers

The Basics Of Pressure Regulators
Sponsored by Beswick
Heavy Duty Shaft Coupling Strategies
Sponsored by ringfeder
Re-Inventing the Rotary Encoder: The No-Compromise IXARC from POSITAL
Sponsored by Fraba Posital
Putting FPGAs to Work in Software Radio Systems
Sponsored by Pentek
Bonded Magnets: A Versatile Class of Permanent Magnets
Sponsored by magnet applications
Changing Face of Robotics
Sponsored by Maplesoft

White Papers Sponsored By: