VANADIUM/TITANIA-BASED CATALYSTS COMPRISING OF NMO(NATURAL MANGANESE ORE) FOR REMOVING NITROGEN OXIDES AND DIOXINE AT WIDE OPERATION TEMPERATURE REGION, AND USING THEREOF

摘要

Vanadium/titania-based catalysts comprising NMO(natural manganese ore) for removing nitrogen oxides and dioxine, which have a wide active temperature band capable of excellently removing nitrogen oxides and dioxine even at high temperatures as well as low temperatures, and a method for selectively reducing nitrogen oxides to remove the nitrogen oxides and removing dioxine at the wide active temperature band are provided. In a vanadium/titania(V/TiO2)-based catalyst for selectively reducing nitrogen oxides contained in exhaust gas, thereby removing the nitrogen oxides and removing dioxine contained in the exhaust gas, the vanadium/titania-based catalyst comprises 5 to 30 wt.% of NMO(natural manganese ore) having pyrolusite comprised of beta-MnO2 as a main crystalline structure. The vanadium/titania-based catalyst comprises 0.5 to 10 wt.% of vanadium. A precursor of the vanadium is ammonium meta vanadate or vanadium chloride. The vanadium/titania-based catalyst is an extruded particle type catalyst or monolithic catalyst. The vanadium/titania-based catalyst is coated on a structure selected from the group consisting of a metal plate, a metal fiber, a ceramic filter and a honeycomb. The vanadium/titania-based catalyst is coated on an air preheater, or a boiler tube bundle.