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Shape Selectivity in Hydroisomerization of n-Hexadecane over Pd Supported on Zeolites: ZSM-22, ZSM-12 and Betaстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 марта 2021 г.
- Авторы: Zhang Jianwei, Maximov A.L., Bai Xuefeng, Wang Wei, Xiao Linfei, Lin Hailong, Wu Wei
- Журнал: Russian Journal of Applied Chemistry
- Том: 93
- Номер: 9
- Год издания: 2020
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1427
- Последняя страница: 1437
- DOI: 10.1134/s1070427220090165
- Аннотация: The development of bifunctional catalysts with high branched isomers selectivity in hydroisomerization of n-alkanes constantly remains crucial for the manufacture of green biodiesel from vegetable oil. Three bifunctional catalysts (Pd/zeolite) were prepared by providing 0.5 wt. % Pd over the ZSM-12, ZSM-22, and Beta zeolite, respectively. The physicochemical properties of the synthesized zeolites and catalysts were investigated by XRD, SEM, N2 physical adsorption, NH3-TPD, Py-IR measurements, and H2 chemisorption methods. The catalytic property for the n-hexadecane hydroisomerization over three bifunctional catalysts was evaluated which indicated that higher distribution of mono-branched iso-hexadecane was obtained over Pd/ZSM-22 and Pd/ZSM-12 catalysts based on the zeolites with one dimensional pore channel due to the high shape selectivity. Compared with Pd/ZSM-12, the Pd/ZSM-22 catalyst showed the higher selectivity for iso-hexadecane due to more favorable metal-acid balance caused by the larger CPd/CH+ ratio. Additionally, the Pd/Beta catalyst displayed highest catalytic activity and maximum iso-hexadecane yield of 69.7% when the n-hexadecane conversion is 78.9%, which resulted from the maximal porosity, BrØnsted acid sites density and mild acidity.
- Добавил в систему: Захарян Елена Михайловна