Search Results

Recently Cu-ion exchanged ZSM-5 have received considerable research attention as a potential, highly probable, cost effective, judicious alternative of noble metal automotive catalyst mainly because of their ability to promote the decomposition and selective hydrocarbon, reduction of nitrogen oxides (NOx) in the presence of large excess of oxygen. In recent vehicle tests it has been found that Cu-ZSM-5 catalysts indeed have much better activity toward NOx reduction under lean conditions than that of its noble metal counterparts. In our previous investigation on catalytic reduction of S I Engine emissions using Cu-ion exchanged ZSM-5, copper sites were found highly active for the simultaneous reduction of NOx and oxidation of HCs and CO. In spite of great potentiality and possibility the disadvantage associated with copper based automotive exhaust catalysts is it's comparatively more towards sulphur poisoning than that of the noble metal.