CATALYTIC REDUCTION OF NITRIC OXIDE BY CARBON MONOXIDE OVER CALCINED LIMESTONE

Abstract

The rate of "NO" reduction by carbon monoxide over calcined limestone was measured over a temperature range (588-922°C) by use of a fixed bed flow reactor. The calcined limestone was found to have a high catalytic activity for "NO" reduction by carbon monoxide and the obtained rate exceeds the rate of catalytic as well as noncatalytic NO reduction by char. A significant effect of calcined lime on NO reduction by carbon monoxide within a calciner and a fluidized bed coal combustor is suggested.