Vanadia catalyst impregnated on titania-pillared clay for the removal of nitrogen oxide

摘要

A catalyst for effectively removing NOx by using NH₃ as a reducing agent is disclosed. Particularly, a vanadia impregnated onto Ti-PILC (titania-pillared interlayer clay) is disclosed, which is prepared by the generally known technology. More specifically, a V₂O₅/Ti-PILC catalyst is disclosed, in which NOx contained in the flue gas from an electric power plant and the like (an excessive amount of SO₂ being present in the flue gas stream) is reacted with NH₃ (which is injected as a reducing agent) over a vanadia impregnated onto a Ti-PILC, so that they can be converted into harmless nitrogen and water. The V₂O₅/Ti-PILC catalyst is employed for reducing NOx contained in the exhaust gas stream as well as the large amounts of SO₂ into nitrogen and water. The catalyst is prepared by pillaring a titania to a clay by a pillaring method. The V₂O₅/Ti-PILC catalyst prepared in the present invention reveals a superior NO removal activity under dry and wet conditions compared with the commercial V₂O₅WO₃/TiO₂ catalyst.