ACTIVATION INFLUENCE ON CATALYTIC ACTIVITY OF CATALYSTS, MODIFIED BY METALS CATIONS OF MORDENITE SYNTHETIC ZEOLITE IN TOLUENE DISPROPORTIONATION REACTION
Catalytic activities of synthetic zeolite (SiO2/Al2O3=18) – mordenite, modified by metal cations (Pd2+, Ni2+, Co2+, Nd3+, Mo3+, Zr4+, Nb5+) activated under different air stream conditions in the temperature range of 300–4200C in disproportionation reaction of toluene to benzene and xylenes were studied. It was found that mordenite zeolite catalysts comprising Pd2+, Ni2+ and Nd3+ cations are more active than the catalysts containing Co2+, Mo3+, Zr4+, Nb5+. It has been established that in conditions under study the samples activated in dry-wet air medew (by joint of toulene and xylene) display the most activity and selectivity
Keywords : disproportionation, toluene, zeolite, mordenite, benzene, xylenes, cation, calcination, modification
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