Integrating pore interconnectivity and adaptability in a single crystal hierarchical zeolite for liquid alkylation

Autor: Guan Sheng, Qiaoli Chen, Jiajin Huang, Zhantu Liao, Yihan Zhu, Jinxiang Dong, Baoyu Liu, Chongzhi Zhu, Yi Huang
Rok vydání: 2021
Předmět:
Zdroj: Liu, B, Huang, J, Liao, Z, Zhu, C, Chen, Q, Sheng, G, Zhu, Y, Huang, Y & Dong, J 2021, ' Integrating pore interconnectivity and adaptability in a single crystal hierarchical zeolite for liquid alkylation ', AIChE Journal, vol. 67, no. 6, e17177 . https://doi.org/10.1002/aic.17177
ISSN: 1547-5905
0001-1541
DOI: 10.1002/aic.17177
Popis: Zeolite belongs to one of the most important families of solid acid catalysts in chemical industries. It is, however, severely constrained by the diffusion limitation for bulky molecules, a lack of multifunctionality for sequential reactions and pore adaptability toward specific adsorbates due to its small micropore size and simple aluminosilicate framework. Introducing mesopores into a zeolite toward realizing hierarchical zeolites is a prevailing strategy but one that usually suffers from compromised crystallinity as well as insufficient interconnectivity and openness of the mesopores. Herein, a novel acid-redox co-functionalized single-crystalline zeolite with highly open and interconnected mesopores is designed and fabricated. As a proof-of-concept study, we integrate solid acid and Fe-oxy redox sites into a hierarchical MEL zeolite with well-characterized microporosity and mesoporosity. This zeolite exhibits superior activity and stability toward alkylation between mesitylene with benzyl alcohol, arising from greatly facilitated intra-crystal molecular diffusion, mitigated metal leaching and optimized adsorbate-pore wall interactions.
Databáze: OpenAIRE
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