Abstract
This work presents the promoting effects of the addition of a second metal to the catalyst and of the addition of SO 2 to the feed during the SCR of NO with ammonia at low temperature over vanadium supported on carbon-coated monoliths. Comparing both effects, the addition of SO 2 in the feed is a much more effective promoter that the addition of a second metal to vanadium. Upon introduction of 400 ppm SO 2 there is around a three-fold increase in the specific activity of the catalyst. It was found that mesoporosity of carbon support plays a key role on the durability of the promoting effect of SO 2 at low temperatures.
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