ENHANCING AND INHIBITING EFFECTS OF SO2 ON SELECTIVE CATALYTIC REDUCTION OF NOX BY ETHENE OVER COPPER-LOADED ALUMINA CATALYSTS

In both the selective catalytic reduction of NO by ethene and the simi lar reaction system except use NO2 instead of NO, almost the same NOx conversions to N-2 were obtained over Cu/Al2O3. In the presence of SO2 in the feeds, however, the two NOx reductions gave different results; the reduction of NO2 was enhanced, while that of NO was inhibited.