Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions
作者机构：Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China
出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)
年 卷 期：2020年第14卷第2期
页 面：258-266页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：the financial support from Ministry of Science and Technology of China(Grant No.2016YFA0202804) the National Natural Science Foundation of China(Grant Nos.21872052,21533002,21571128 and 21603075).
主 题：core/shell ZSM-5 in situ recrystallization mesopore ketalation and acetalization reactions
摘 要：Hierarchical core/shell Zeolite Socony Mobil-five(ZSM-5)zeolite was hydrothermally postsythesized in the solution of NaOH and diammonium surfactant via a dissolution-reassembly strategy.The silica and alumina species were firstly dissolved partially from the bulky ZSM-5 crystals and then were reassembled into the MFI-type nanosheets with the structure-directing effect of diammonium surfactant,attaching to the out-surface of ZSM-5 core crystals.The mesopores thus were generated in both the core and shell part,giving rise to a micropore/mesopore composite material.The micropore volume and the acidity of the resultant hybrid were well-preserved during this recrystallization process.Possessing the multiple mesopores and enlarged external surface area,the core/shell ZSM-5 zeolite exhibited higher activity in the ketalation and acetalization reactions involving bulky molecules in comparison to the pristine ZSM-5.
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