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Conversion of Methanol to Aromatic-Rich Gasoline over High-Efficiency Bifunctional Catalysts: Green Synthesis of GaZSM-5 Zeolites via Dry-Gel Conversion Strategyстатья
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: Su X.F., Zhang Y.L., Maximov A.L., Zhang K., Xin Q., Feng C.Q., Bai X.F., Wu W.
- Журнал: Russian Journal of Applied Chemistry
- Том: 93
- Номер: 1
- Год издания: 2020
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 127
- Последняя страница: 136
- DOI: 10.1134/s1070427220010140
- Аннотация: Nanoscale ZSM-5 (AlZ5-D) and Ga-substituted ZSM-5 zeolites ((Al,Ga)Z5-D and GaZ5-D) were prepared via green dry-gel conversion strategy. For comparison, ZSM-5 zeolite (AlZ5-T) was also prepared by traditional hydrothermal method. The effects of synthesis method and Ga introduction on the physicochemical property and catalytic behavior of methanol to gasoline (MTG) were investigated. The results showed that the aromatics selectivity decreased while C5+ alkanes selectivity increased for AlZ5-D sample compared with that of AlZ5-T, which was attributed to the significantly reduced density of BrØnsted acid sites and weakened strong acidity. After Ga introduction, the acid strength of samples further weakened due to the formation of Si—OH—Ga bridge hydroxyl group by insertion of Ga into the zeolite framework, inhibiting the cracking reaction and, thus increasing the gasoline selectivity. Also, the extra-framework Ga species, especially in the form of GaO+ in GaZ5-D sample, showed high dehydrogenation activity, leading to the highest selectivity of aromatics and gasoline.
- Добавил в систему: Захарян Елена Михайловна