| 摘要 |
PURPOSE:To considerably accelerate a reduction removal reaction of NOx with hydrocarbon in an excess oxygen-contg. atmosphere, to inhibit the formation of N2O and to increase N2 selectivity by preparing a catalyst obtd. by carrying Pt on an inorg. oxide carrier and incorporating acidic anions into the carrier after firing. CONSTITUTION:This catalyst for removal of NOx is a catalyst obtd. by carrying Pt on an inorg. oxide carrier and contains acidic anions in the carrier after firing. This catalyst considerably accelerates a reduction removal reaction of NOx contained in various exhaust gases such as exhaust gas from a boiler or the internal-combustion engine of an automobile, etc., and exhaust gas discharged from a nitric acid producing plant, etc., with hydrocarbon as a reducing agent. This catalyst is especially effective in a reduction reaction of NOx in an excess oxygen-contg. atmosphere, is characterized by a low rate of formation of NOx, that is, excellent N<2> selectivity and contributes to industrial profit or pollution control. |
