Holubchyk K. Modified natural clinoptilolite and tripolis. Preparation, properties, and use

This dissertation work deals with the resolution of some theoretical issues and practicalities of the predictable control of structural, structural-adsorption and physicochemical parameters of natural clinoptilolite and tripolis and the use of the latter as supports for copper-palladium complexes exhibiting remarkable catalytic activity in the reaction of low-temperature carbon monoxide (CO) oxidation with air oxygen. Such properties make the catalysts thus obtained applicable in some personal respiratory protective devices for workers occupied in various industries where carbon monoxide is contained in the air of the working areas.  In the work, natural clinoptilolite, N-CLI, from deposit Sokirnitskyy, Zakarpats'ka Oblast', natural tripoli from deposit Konoplianskyy, Kirovohrads'ka Oblast', as two batches mined at different depths, N-Tr(K-I) and N-Tr(K-II)), and natural tripoli from deposit Mohyliv-Podil's'kyy, Vinnyts'ka Oblast', N-Tr(M-P), were used. The copper-palladium complexes anchored on tripolis showed a much higher catalytic activity than those anchored on clinoptilolite. It has been shown that copper-palladium complexes anchored on modified tripolis demonstrate a higher catalytic activity than the compositions based on natural tripolis: CO conversion in the steady-state mode for them is within the range from 88 to 99 %. The final CO concentrations in the steady-state mode were lower than MPC in the case of the catalysts based on noncarbonaceous tripoli.