Regulation of Al distribution in ITR zeolite for methanol to propylene  

作　　者：Kai Fan Shuo Liu Qinming Wu Andree Iemhoff Eduard Kunkes Trees De Baerdemaeker Andrei-Nicolae Parvulescu Nils Bottke Toshiyuki Yokoi Dirk E.De Vos Xiangju Meng Weiping Zhang Feng-Shou Xiao 

机构地区：[1]Key Lab of Applied Chemistry of Zhejiang Province and Department of Chemistry&College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310028,Zhejiang,China [2]State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China [3]BASF SE,Ludwigshafen 67056,Germany [4]Chemical Resources Laboratory,Tokyo Institute of Technology,Yokohama 226-8503,Japan [5]Centre for Surface Chemistry and Catalysis,KU Leuven,Leuven 3001,Belgium

出　　处：《Journal of Energy Chemistry》2025年第3期120-125,共6页能源化学(英文版)

基　　金：supported by the National Key Research and Development Program of China(2022YFA1503602);the National Natural Science Foundation of China(22288101,U21B20101 and 22172141);the BASF International Network of Centers of Excellence project;the Zhejiang Provincial Natural Science Foundation of China(LR24B030001)。

摘　　要：ITR zeolite could be potentially used as catalysts in methanol to propylene(MTP),where their performance is strongly related to its Al distribution.However,the control of Al distribution in ITR zeolite poses a significant synthetic challenge.Herein,we demonstrate the possibility to control the Al distribution in ITR zeolites using zeolite A as an aluminum source(A-ITR).The A-ITR exhibited similar crystallinity,nanosheet morphology,textual parameters,and acidic concentration with those of conventional ITR made zeolites using aluminum isopropoxide as an aluminum source(C-ITR).Characterizations of the zeolite product with^(27)Al MQ.MAS NMR spectra,^(27)Al MAS NMR spectra,and 1-hexene cracking reveal that the A-ITR zeolites have more Al species distributed in T6 and T8 sites located in relatively smaller micropores of the framework than C-ITR.As a result,the A-ITR gave enhanced catalyst lifetime and propylene selectivity due to the suppression of the aromatic cycle in the MTP reaction,compared with the C-ITR.This work provides an alternative approach to prepare efficient ITR zeolites for MTP reaction.

关 键 词：ZEOLITE Aluminosilicate ITR Al distribution Methanol to propylene 

分 类 号：O643.36[理学—物理化学]