Effect of Binder Content on the Properties of Nanocrystalline Zeolite BEA-based Catalysts for Benzene Alkylation with Propylene

Bok, T.O.; Andriako, E.P.; Ivanova, I.I.

Авторы: Bok T.O., Andriako E.P., Ivanova Irina Igorevna
Журнал: Petroleum Chemistry
Том: 61
Номер: 8
Год издания: 2021
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 901
Последняя страница: 907
DOI: 10.1134/s0965544121080090
Аннотация: The effect of binder content (aluminum hydroxide) on the textural, acidic, and catalytic propertiesof nanocrystalline zeolite BEA-based catalysts for the alkylation of benzene with propylene has been studied. Ithas been shown that increasing binder content increases the volume of mesopores in the sample and decreasesthe volume of micro- and macropores. Increased binder content in the catalyst primarily results in a decrease inthe concentration of weak acid sites, whereas the concentration of strong acid sites changes only slightly. Theobserved regularity is associated with the reaction of the binder and the zeolite during the preparation of thecatalyst, as well as with the formation of new acid sites. It has been found that increasing binder content increasesthe mechanical strength of the granulated catalyst, but this is accompanied with a decrease of its catalytic activityand stability in the gas-phase alkylation of benzene with propylene. It has been shown that the optimal content ofthe Al2O3 binder in the catalyst is about 30 wt %. The sample with the optimal binder content has demonstrateda stable on-stream behavior in the liquid-phase reaction that occurred with 99.4 wt % alkylation selectivity,91.1 wt % cumene selectivity at 100% propylene conversion.
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Effect of Binder Content on the Properties of Nanocrystalline Zeolite BEA-based Catalysts for Benzene Alkylation with Propyleneстатья

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