EXHAUST GAS TREATING HONEYCOMB CATALYST AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas treating honeycomb catalyst which exhibits high denitration performance when an exhaust gas at a low temperature (approximately 70 to 250°C) is treated and is hardly deactivated when a poisoning component including an alkali metal or an alkaline earth metal (especially calcium) and an exhaust gas containing much of ammonium sulfate are used.SOLUTION: There is provided an exhaust gas treating honeycomb catalyst which comprises a carrier consisting of a mixture of two or more different inorganic single oxides or inorganic composite oxides and an active metal component, where the difference (SA-SA) between the specific surface area by a BET method and the specific surface area of the catalyst pores of 5 nm to 5 μm by a mercury penetration porosimetry method is in the range of 25 to 35 m/g.SELECTED DRAWING: Figure 1