CATALYST FOR REMOVING NITROGEN OXIDES

摘要

PURPOSE:To obtain a catalyst becoming a high strength large-scale structure suitable for a large capacity denitrification apparatus by supporting fine inorg. oxide particles in the fiber interstices of an inorg. fiber fabric and specifying the diameter ratio and wt. ratio of both of them. CONSTITUTION:Fine particles of inorg. oxide consisting of titanium oxide and oxide of one or more kind of an element selected from vanadium, molybdenum and tungsten are supported within the fiber interstices of an inorg. fiber fabric composed of a ceramic fiber or a glass fiber. The ratio of the diameter of fine particles of inorg oxide to that of the inorg. fiber of the inorg. fiber fabric is set to 0.2 or less and the ratio of the wt. of the fine particles of inorg. oxide to that of the inorg. fiber fabric is set to 0.05-0.8. By this method, a high strength denitrification catalyst having elasticity in itself and capable of holding a shape by itself and suitable for a large capacity denitrification apparatus can be formed.