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Evaluation of the Properties of ZSM-5 Type Zeolites Modified with CexMg1–xAl2O4 Nanopowders in the Toluene Disproportionation Reaction
Petroleum Chemistry ( IF 1.4 ) Pub Date : 2021-08-04 , DOI: 10.1134/s0965544121080041
F. Sh. Kerimli 1 , T. M. Ilyasli 1 , S. E. Mammadov 1 , N. F. Akhmedova 1 , N. I. Makmudova 1 , E. I. Akhmedov 1 , E. S. Mammadov 2
Affiliation  

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.



中文翻译:

CexMg1-xAl2O4纳米粉体改性ZSM-5型沸石在甲苯歧化反应中的性能评价

摘要

研究了 Ce x Mg 1– x Al 2 O 4尖晶石纳米粉体对 HZSM-5 沸石在甲苯歧化反应中显示的结构、酸性和催化性能的影响。用 Ce x Mg 1– x Al 2 O 4纳米粉末改性导致强质子位点浓度降低,形成新的更强非质子位点,并减少 HZSM-5 的孔体积,从而产生更多的空间位阻扩散的ø -和-xylenes和提高催化剂的对位选择性。实现高p的可能性在甲苯转化率为 20.3-29.7% 的情况下,通过甲苯歧化反应,与最佳 5% Сe 0.1 Mg 0.9 Al 2 O 4 /HZSM-5 催化剂相比,-二甲苯选择性为 65.7-77.3% 。

更新日期:2021-08-09
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