METHOD FOR REMOVING NITROGEN OXIDE

摘要

PURPOSE:To provide a method for removing NOx with a catalyst hardly causing aggregation due to heat and excellent in durability. CONSTITUTION:Zeolite having at least >=15 molar ratio of SiO2 to Al2O3 is vacuum-fired after ion exchange with an aq. soln. contg. monovalent copper ions or monovalent copper complex ions to obtain a catalyst and NOx is removed from waste gas contg. excess oxygen as well as NOx and hydrocarbon with the catalyst.