Evaluation of Cu-PPHs as active catalysts for the SCR process to control NO x emissions from heavy duty diesel vehicles

Abstract

Copper based catalysts supported on mesoporous materials, which were in turn based on a surfactant expanded zirconium phosphate for the formation of silica galleries in the interlayer space, were prepared by the impregnation method. They were then characterised and tested in the selective catalytic reduction of NO with ammonia as active catalysts for the control of the NO x emissions from heavy duty vehicles. Copper catalysts displayed a high catalytic performance, even in the presence of 14% (v/v) of H 2O and 100 ppm of SO 2. They also displayed improved catalytic behaviour when compared to a CuZSM5 catalyst.