Process for the disposal in the gas of the nitrogen oxides nox by selective catalytic reduction (scr) is ammonia, on catalysts zeolitic does not cause the formation of nitrous oxide

摘要

Is used as catalysts scr not generators of nitrous oxide of the zeolite, partially exchanged with copper, in particular the faujasites, in which the copper does not occupy the small cages (for example the sodalite cages connected faujasites). Particular attention is paid to certain zeolites mixed rare earth / copper. The selectivity of reduction of nox at n2 is correlated to the diagram tpr of the catalysts.