A CATALYTIC SYSTEM AND ITS USE

摘要

A gas-cleaning catalytic unit for use in cleaning exhaust gases from small internal combustion engines, comprises an open mesh knitted or woven fabric (10) produced from heat-resistant metal wire and shaped to a pack of predetermined form having a plurality of adjacent metal fabric layers, and a casing which surrounds the pack and forms gas throughflow passages. The unit is characterized in that at least half of the layers in the metal fabric pack are comprised of metal fabric (10) which is corrugated generally continuously in at least two directions along lines (14; 15) which define an angle (.beta.) therebetween; and in that the corrugated metal fabric (10) is so arranged in the pack that the apex of said angle will point in a direction transversely to the direction of the throughflow passages.