MODIFIED MATTER OF SEPIOLITE, USING THE SAME CATALYST AND METHOD FOR DENITRIFICATION OF FLUE GAS

PURPOSE:To provide the catalyst for denitrification of flue gases which is freely applicable regardless of the kinds of exhaust combustion gases and flue gas treating systems by subjecting the skeletal Mg in sepiolite to an ion exchange with metal V. CONSTITUTION:The modified matter of the sepiolite is obtd. by subjecting the skeletal Mg thereof to the ion exchange with the metal V. The sepiolite to be used may be either of the natural clay ore essentially consisting of hydrous magnesium silicate and the sepiolite synthesized from a magnesium salt and silicate. The method of ion exchanging the V with the sepiolite may be executed by using vanadium oxysulfate (IV)VOSO4 and vanadium oxyhydochloride (IV) VOCl2. A high denitrification rate is obtd. even at a relatively low treating temp., and the excellent resistance to clogging by dust is obtd. if this modified matter is used as the catalyst for denitrification of exhaust combustion gases. This catalyst is applicable to all exhaust gases from clean exhaust gases to dirty exhaust gases.