Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions  

作　　者：Peng Luo Yejun Guan Hao Xu Mingyuan He Peng Wu 

机构地区：[1]Shanghai Key Laboratory of Green Chemistry and Chemical Processes,School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200062,China

出　　处：《Frontiers of Chemical Science and Engineering》2020年第2期258-266,共9页化学科学与工程前沿（英文版）

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).

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.

关 键 词：core/shell ZSM-5 in SITU recrystallization MESOPORE KETALATION and ACETALIZATION REACTIONS 

分 类 号：O64[理学—物理化学]