CATALYST COMPOSITION, ITS PRODUCTION AND SELECTIVE REDUCTION OF NITROGEN OXIDE CONTAINED IN OXIDIZING GAS DISCHARGED SUBSTANCE USING SAID COMPOSITION

摘要

The composition contains as active material mordenite in an ammonium or acidic form with a residual sodium content lower than 1,000 ppm wt, representing 70 to 95 % of the total weight of the catalyst composition, the remainder consisting of a binder; the active material itself may be in the form of small-pore mordenite exchanged with the copper cation. …Application to the purification of effluents with a high content of nitrogen oxides, in particular to the decontamination of tail gases discharged into the atmosphere, in the manufacture of nitric acid.