ELECTROCHEMICAL MEMBRANE FLUE-GAS DESULFURIZATION - K2SO4 V2O5 ELECTROLYTE/

The viability of a new electrolyte was demonstrated in the bench-scale electrochemical removal of SO, from flue-gas streams at high temperat ures. At current densities up to 20 A/m(2) approximately 99% current e fficiency was achieved when removing 90% of inlet SOx at 480 degrees C . As current densities increased to 100 A/m(2), current efficiencies w ere 64% at 480 degrees C and 73% at 520 degrees C. While species prese nt in this K2SO4/V2O5 molten salt are not well understood, a simple me chanism was used to develop a model to describe the observed removal r esults. This model was then used to predict preliminary economic viabi lity of this system based on known electrochemical technology.