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Evaluation of the Properties of ZSM-5 Type Zeolites Modified with CexMg1–xAl2O4 Nanopowders in the Toluene Disproportionation Reaction

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Abstract

The effect of CexMg1–xAl2O4 spinel nanopowders on the textural, acidic, and catalytic properties displayed by HZSM-5 zeolite in the toluene disproportionation reaction was examined. Modification with CexMg1–xAl2O4 nanopowders caused a decrease in the concentration of strong protonic sites, formation of new stronger aprotonic sites, and a decrease in the pore volume of HZSM-5, thereby creating more steric hindrance to diffusion of o- and m-xylenes and enhancing para-selectivity of the catalyst. The possibility of achieving high p-xylene selectivity of 65.7–77.3% via toluene disproportionation over the optimal 5% Сe0.1Mg0.9Al2O4/HZSM-5 catalyst at toluene conversion of 20.3–29.7% was demonstrated.

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Kerimli, F.S., Ilyasli, T.M., Mammadov, S.E. et al. Evaluation of the Properties of ZSM-5 Type Zeolites Modified with CexMg1–xAl2O4 Nanopowders in the Toluene Disproportionation Reaction. Pet. Chem. 61, 895–900 (2021). https://doi.org/10.1134/S0965544121080041

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