| 摘要 |
PURPOSE:To provide a catalyst compsn. capable of effectively reducing a Nox which is contained slightly or in a small amt. in exhaust gases at the mild condition of normal pressure by incorporating a prescribed ratio of cubic tungsten carbide and at least one kind of metal or oxide or carbide of a metal into the catalyst. CONSTITUTION:This catalyst compsn. for reduction of the Nox in exhaust gases contains >=30vol.% cubic tungsten carbide and at least one kind of the metal or the oxide or carbide of the metal (excluding the cubic tungsten carbide). The catalyst compsn. for reduction comes into efficient contact with a reaction system of exhaust gases in accordance with the use condition, etc., and can be arbitrary shapes, insofar as the catalyst does not run off outside the system. The catalyst removes the Nox in the exhaust gases and prevents the pollution by the exhaust gases when the catalyst is mounted in the pipelines of exhaust systems of not only automobiles but also traffic organs, internal combustion engines in factories as well boilers in power plants, factories, buildings, etc. |
