CATALYST FOR REMOVING NITROGEN DIOXIDE AND NITRIC OXIDE

摘要

A catalyst comprises copper supported on the zeolite carrier and is available to remove nitrogen oxides in the combustion exhaust gas layer which contains surfurous acid gas, using ammonia as a reducing agent. The zeolite used is a natural zeolite containing mordenite type having the weight ratio of silicon to aluminum, 4-5. The above copper from copper sulfate, copper nitrate and copper acetate is supported on natural zeolite by ion exchange reactions, the amount of supporting being 0.75-2.25 wt.% against the overall weight of the catalyst.