UREA HYDROLYSIS CATALYST, SELECTIVE REDUCTION CATALYST CONTAINING UREA HYDROLYSIS MATERIAL, AND EXHAUST GAS CLEANING APPARATUS

摘要

An object of the present invention is to provide a urea hydrolysis catalyst and a selective reduction catalyst containing a urea hydrolysis material which have an excellent hydrolysis ability of urea-water solution to NH 3 and can exhibit the ability at low temperatures upon removal of nitrogen oxide (NOx) from exhaust gas emitted from lean-burn engines such as boilers, gas turbines, lean-burn gasoline engines and diesel engines. Provided is a urea hydrolysis catalyst including a monolithic carrier coated with a urea hydrolysis material as one or more catalytic layers, wherein the urea hydrolysis material includes a titania-containing inorganic oxide having an activation energy of urea hydrolysis reaction of 120 kJ/mol or less.