METHODS TO INCREASE THE EFFICIENCY OF A METALLIC MONOLITHIC CATALYST

The increasing interest in using metallic monolithic catalysts for aut omotive emission control raises certain optimization possibilities. Cr eating obstacles in the channels by disfiguring the channel wall in th e manufacturing process can give rise to an increased transport rate t o the catalyst wall and an increased reaction rate in the wash-coat. I n the present mathematical simulation study, the decrease in the resid ual carbon monoxide at the outlet and the accompaning pressure drop in crease were calculated for different designs of the metallic monolithi c catalyst. A standard unsegmented monolith without obstacles was comp ared with monoliths with two obstacles, monoliths with changed dimensi ons of the channels, and monoliths segmented into three separate piece s in series.