NOx REMOVAL CATALYST FOR HIGH-TEMPERATURE FLUE GAS, MANUFACTURING METHOD THEREOF, AND NOx REMOVAL METHOD FOR HIGH-TEMPERATURE FLUE GAS

摘要

A NOx removal catalyst for high-temperature flue gas according to the present invention is a NOx removal catalyst for high-temperature flue gas that contains nitrogen oxide in which tungsten oxide with the number of molecular layers of tungsten oxide (WO3) being five or less is supported on a complex oxide carrier containing titanium oxide. Even when high-temperature denitration is continued, a bonding force with a carrier of WO3 can be properly maintained and volatilization can be suppressed while maintaining a high NOx removal performance. For example, the NOx removal catalyst is particularly suitable for reducing and removing nitrogen oxide contained in high-temperature gas discharged from a thermal power plant and a high-temperature boiler.

主权项

1. A manufacturing method of a NOx removal catalyst for high-temperature flue gas, wherein a substance containing either a zirconium compound or a silica compound and a titanium compound is fired at 500° C. to obtain a complex oxide carrier, and tungsten oxide is supported on the complex oxide carrier and fired at 650° C. to obtain a powdered catalyst.