Electrochemical Abatement of Pollutants NOx and SOx in Combustion Exhaust Gases Employing a Solid-Oxide Electrolyte: First Quarterly Report, October-December 1988.

摘要

The objective of this contract is to test the feasibility of eliminating the pollutant species NO and SO2 in combustion exhaust gases by pumping off oxygen employing a dry solid-oxide, oxygen-ion type electrolyte system. At the same time to conserve electrical power for pumping it is desirable not to have to pump off any unreacted O2 that may remain in the exhaust gases. The applications in mind are treating exhaust gases from such devices as internal combustion engines, gas turbines and power-plant flue gases in the 400--700 degree C temperature range (employing stabilized-bismuth oxide electrolytes) as well as the cleanup of high pressure, combustion gas prior to entering a gas turbine in the 700--1000 degree C temperature range (employing stabilized-zirconia electrolytes). It is the goal of the initial phase of this research to further investigate the role of oxygen vacancies in electrocatalysis, and then address the mass action effect. 2 refs., 2 figs.