A SOLID ELECTROLYTE CARBON DIOXIDE REDUCTION SYSTEM.
Final rept. Dec 67-Sep 68,
ISOMET CORP PALISADES PARK N J
Pagination or Media Count:
An investigation of solid electrolyte cells utilizing a 90 mole ZrO2-10 mole Y2O3 electrolyte and platinum electrodes for the reduction of carbon dioxide to carbon monoxide and oxygen was carried out. At 1000 C, oxygen production efficiency is less than 50 when the cell is operated at a current density greater than 0.040 ampcu cm on a dry COCO2 mixture as cathode feed. Reduction of the solid electrolyte because of insufficiently rapid transfer of oxygen from the cathode feed gas to the cathode is the direct cause of low current efficiency. Reduction of the electrolyte can lead to formation of a two-phase region in the electrolyte which can, in turn, result in permanent damage to the electrolyte. The presence of water vapor in the feed mixture of CO and CO2 decreases cell polarization, decreases electrolyte reduction and increases oxygen production efficiency. Author
- Industrial Chemistry and Chemical Processing
- Life Support Systems