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author:

Zhou, Y. (Zhou, Y..) [1] | Liu, H. (Liu, H..) [2] | Rao, X. (Rao, X..) [3] | Yue, Y. (Yue, Y..) [4] | Zhu, H. (Zhu, H..) [5] | Bao, X. (Bao, X..) [6]

Indexed by:

Scopus

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:

Al pairs; Framework Al distribution; Organotemplate-free; Rectorite; ZSM-5 zeolite

Community:

  • [ 1 ] [Zhou, Y.]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
  • [ 2 ] [Liu, H.]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
  • [ 3 ] [Rao, X.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Yue, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 5 ] [Zhu, H.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 6 ] [Bao, X.]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
  • [ 7 ] [Bao, X.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China

Reprint 's Address:

  • [Yue, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, State Key Laboratory of Heavy Oil Processing, China University of PetroleumChina

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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: 0

SCOPUS Cited Count: 20

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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