30-P-12-Selective catalytic reduction of NOx by NH3 over Mn supported MCM-41 mesoporous materials

Abstract

This chapter discusses the selective catalytic reduction (SCR) of NO x by ammonia (NH 3 ) over manganese (Mn)-supported MCM-41 mesoporous materials. Mn-MCM-41 catalysts are prepared and tested using the selective catalytic reduction of NO x by NH 3 . The influence of the support (siliceous or aluminosilicate MCM-41) as well as the composition of the gas feed are investigated with respect to the catalytic activity. The pure siliceous MCM-41 offers much better catalytic properties to the catalyst. The presence of a mixture of nitric oxide (NO) and nitrogen dioxide (NO 2 ) in the gas feed causes an increase of SCR activity. The catalysts analyzed exhibit high NO x conversion at temperatures above 250°C.