POSCO Holdings Inc.
SCR CATALYST HAVING EXCELLENT SULFUR TOLERANCE

Abstract:

Provided is an SCR catalyst for removing nitrogen oxides (NO.sub.x) from exhaust gas, comprising: 0.01-70 wt % of zeolite having an average pore size of 5 .ANG. or more; 25-90 wt % of titanium dioxide (TiO.sub.2); and 4-10 wt % of vanadium pentoxide (V.sub.2O.sub.5). The SCR catalyst according to the present invention exhibits denitrification performance in a low-temperature area that is superior to that of a conventional SCR catalyst, has improved tolerance for a sulfur compound, and also has an excellent regeneration rate.