Catalytic Reduction Of Nitrogen With CuZSM-5 Catalyst

Abstract

This study bears on the reduction of nitrogen monoxide with CuZSM-5 catalyst of copper oxide compounds modified with zeolite of a silica concentration of 1.5% in mass. The reactions of NO with catalysts composed of mordenites (0.75% CM, 1.5% CuM and 2.2% CuM) were studied and the result showed that these compounds are not active. The reaction of NO with CuO and CuO/ƒ×-Al2O3 compounds was also studied. The reduction of CuO was observed at all temperatures of the experiment. An increase in CuO concentration in the CuO/ƒ×-Al2O3 catalyst of 0.5 to 1.5% mass increased its activity. The speed of the NO and CuZSM-5 catalyst reaction was higher than that with the CuO/ƒ×-Al2O3 catalyst. The result obtained show that the CuZSM-5 modified catalyst is more active and therefore can be useful for the purification of the emissions of nitrogen monoxide. This work can contribute to fight environmental pollution. Key Words: Nitrogen monoxide, catalyst, reduction, zeolite