Modified Natural Zeolite in Catalytic Clearing of Exhaust and Ejected Gases from Nitric and Carbon Oxides.

摘要

The catalyst for joint conversion of nitric and carbon oxides was developed on thebase of natural zeolite-clinoptilolite from Georgian deposit. Catalyst making isaccomplished with copper cations introducted by ion-exchange way followed previousdecationation. The high oxidative activity in reduction of NO_x by CH_4, NH_3, H_2 andespecially CO explained by the presence of copper-ions in the zeolite structure. Thedegree of (NO_x+CO) reaction reach 95-98% conversion above 400℃. This catalyst hasthe following advantages: cheapness and availability of tufa, high zeolite content,simple making, low temperature of nitric and carbon oxides conversion (150-500℃),possibility of regeneration.