Flexible duct element for use in exhaust system of diesel engine of motor car, has flexible hollow body for conveying effluent stream, where parts of element are comprised of and/or partially coated with catalytic active material

摘要

The element has a flexible hollow body for conveying effluent stream, where parts of the element come into contact with the effluent stream and are comprised of and/or partially coated with a catalytic active material. The hollow body is comprised of an annular curved or screw thread shape curved metal bellows and/or a flexible metal pipe. The catalytic active material corresponds a catalytic coating of a selective catalytic reduction (SCR) catalyzer for exhaust gases of a combustion engine. The parts of the element are comprised of or coated with aluminum or aluminum oxide.