Rasmussen, Søren Birk2; Eriksen, Kim Michael1; Fehrmann, Rasmus1; Winnick, J.4
1 Department of Chemistry, Technical University of Denmark2 Department of Chemistry, Technical University of Denmark3 Georgia Institute of Technology4 Georgia Institute of Technology
Bench scale fuel cell tests have been carried out on the SO2 oxidation catalyst systems V2O5/M2S2O7 (M = alkali) used as electrolytes in a standard molten carbonate fuel cell (MCFC) fuel cell setup for removal of SO2 from power plant flue gases. Porous LixNi(1-x)O electrodes were used both as anode and cathode. The cleaning cell removes SO2 when a potential is applied across the membrane, potentially providing cheap and ecological viable means for regeneration of SO2 from off-gases into high quality H2SO4. Results show that successful removal of up to 80% SO2 at 450 degreesC can be achieved at approximately 5 mA cm(-2). However, the data obtained during the experiments explain the current limitations of the process, especially in terms of electrolyte wetting capability and acid/base chemistry of the electrolyte.
Journal of Applied Electrochemistry, 2002, Vol 32, Issue 1, p. 19-23