KATALYSATOR ZUR ENTFERNUNG VON STICKSTOFFOXYDEN.

摘要

A catalyst for removing nitrogen oxides contained in exhaust gases, particularly those containing vapor-form catalyst poisons, by catalytic reduction with ammonia, while retaining a high denitration performance for a long time, which catalyst comprises titanium oxide as a first component, molybdenum oxide and/or tungsten oxide as a second component and vanadium oxide and/or sulfate as a third component, the atomic ratio of the respective elements being Ti:Mo and/or W:V = 80-96.5:3-15:0.5-5, and the size of the crystallite of the titanium oxide according to Sherrer's equation being in the range of 185 ANGSTROM to 300 ANGSTROM in the direction of a plane (101) (interplanar spacing: d = 3.52 ANGSTROM ).