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author:

Zhou, Yanni (Zhou, Yanni.) [1] | Liu, Haiyan (Liu, Haiyan.) [2] | Rao, Xiaorong (Rao, Xiaorong.) [3] | Yue, Yuanyuan (Yue, Yuanyuan.) [4] | Zhu, Haibo (Zhu, Haibo.) [5] | Bao, Xiaojun (Bao, Xiaojun.) [6]

Indexed by:

EI

Abstract:

Precisely tuning the location of Al atoms in zeolite framework that plays a critical role in determining the catalytic performance of zeolite based catalysts has attracted considerable attention. In this article, we present an organotemplate-free approach for the controllable synthesis of ZSM-5 zeolite with a high content of Al pairs selectively located at the channel intersections, which is achieved by using a submolten salt (SMS) depolymerized rectorite as both the Al source and heteropical crystalline seeds. The quasi in-situ characterizations tracking the zeolite crystallization process reveal that the depolymerized rectorite with abundant oligomeric aluminosilicate species and Al–O-(Si–O)1,2-Al sequences plays dual roles in the synthesis of ZSM-5 zeolite. These oligomeric aluminosilicate species like 5- and 6-membered ring structures serve as the crystalline seeds to promote the zeolite nucleation; simultaneously, the Al–O-(Si–O)1,2-Al sequences are in-situ transformed into the final zeolite framework leading to the generation of numerous Al pairs selectively located at the channel intersections. Such an unusual Al distribution endows the synthesized ZSM-5 zeolite with excellent catalytic performance in methanol to aromatics (MTA) reaction. Our strategy provides a sustainable and efficient way to design and synthesize high-performance zeolites with special framework Al distributions for catalytic applications. © 2020 Elsevier Inc.

Keyword:

Aluminosilicates Aluminum Oligomers Silicon Zeolites

Community:

  • [ 1 ] [Zhou, Yanni]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing; 102249, China
  • [ 2 ] [Liu, Haiyan]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing; 102249, China
  • [ 3 ] [Rao, Xiaorong]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 4 ] [Yue, Yuanyuan]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 5 ] [Zhu, Haibo]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 6 ] [Bao, Xiaojun]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing; 102249, China
  • [ 7 ] [Bao, Xiaojun]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou; 350116, China

Reprint 's Address:

  • [yue, yuanyuan]national engineering research center of chemical fertilizer catalyst, college of chemical engineering, fuzhou university, fuzhou; 350116, china

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Source :

Microporous and Mesoporous Materials

ISSN: 1387-1811

Year: 2020

Volume: 305

5 . 4 5 5

JCR@2020

4 . 8 0 0

JCR@2023

ESI HC Threshold:196

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 23

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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