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Modified Natural Zeolites as Catalysts for Catalytic Reduction of NO with CO—Main Components of Exhaust Gases



Author(s)

Giorgi Maisuradze, Shota Sidamonidze, Lali Akhalbedashvili and Revaz Kvatashidze

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DOI:10.17265/2162-5263/2015.11.002

The study of oxidized-reduced properties of modified natural zeolites from deposits of Georgia—clinoptilolite and mordenite in reaction of reduction NO with Н2, NH3, CH4 and especially СО was carried out for the purpose to obtain effective catalyst for afterburning of toxic components of automobile exhaust. The activity of zeolites essentially depends on nature of cation and temperature of reaction and slightly depends on structure of zeolite and ratio of reactants. The introduction of copper and iron ions in preliminary decationated clinoptilolite and mordenite causes growth of conversion degree of nitrogen and carbon monoxides almost on a degree, especially in low temperature interval. The reaction between NO and CO molecules proceeds in coordinative sphere of TM cations through formation of nitrosyl and carbonyl complexes.

Natural zeolites, NO, CO, reduction, automobile exhaust