Electrogenerative and related electrochemical methods for NOx and SOx control

Electrogenerative processes can be used to reduce nitric oxide to low levels in a variety of gas streams. An approach for applying these and related electrochemical reduction processes to selectively reduce NOx concentrations in power plant effluents is discussed. Both electrogenerative oxidation and reduction of sulfur dioxide can occur. However, oxidation of sulfur dioxide to sulfuric acid seems to be the most feasible route for incorporation into an electrochemical flue gas treatment which might also produce useful chemicals. A strategy for implementing an “electrochemical scrubbing” procedure is described.