Process for the reductive destruction of nitrogen oxides in dust-laden waste gases from plants for the production of cement

摘要

Process for the reductive destruction of nitrogen oxides in exhaust gases with a honeycomb or cellular catalyst, wherein exhaust gases from furnaces for the production of cement, the dust content of more than 40 g / m3 i. N. f. have, cleaned, using a titanium oxide-containing catalyst having an open front surface of more than 50%, the channels of the catalyst having a hydraulic diameter of 9 mm to 30 mm, the inner walls of the catalyst body having a wall thickness of 1.0 have mm to 1.5 mm, the catalyst with an exhaust gas velocity of more than 3 m / sec i. B. is flowed through and the shortest distance between two wall centers over the cross section of a cell is 10 mm to 31 mm.