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Innovations in hierarchical zeolite synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
53290 46962 2016 13 PDF Available
Title
Innovations in hierarchical zeolite synthesis
Abstract

•Recent innovations in the research of hierarchical zeolites by different methods.•Progress of hierarchical structures derived from two-dimensional (2D) zeolite nanosheets.•Summary and outlook with industrial perspectives of this field.

There has been growing interest in the research and development of hierarchical zeolites possessing at least two levels of porosity in order to reduce diffusion limitations in reactions catalyzed by microporous zeolites. Engineering and manipulation of the hierarchy of pore structures are required to facilitate transport of large reactants and to improve the accessibility of active sites in zeolite catalysts. Various strategies and approaches have been proposed and developed in order to introduce secondary porosity, which is usually in the mesopore range, for conventional zeolites. From controllable post-synthetic modifications to designed direct synthesis with or without mesopore templating agents, significant progress has been made over the past several years in making hierarchical zeolites. In this paper, recent innovations in the synthesis of hierarchical zeolites by different methods will be reviewed, including post-synthetic demetallation, hard- and soft-templating approaches, and template-free routes. We will also discuss separately the progress of hierarchical structures derived from two-dimensional (2D) zeolite nanosheets. A summary and outlook will also be discussed with the focus on providing industrial perspectives of this field.

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Keywords
Hierarchical zeolites; Mesoporous zeolites; 2D zeolites; Desilication; Templating
First Page Preview
Innovations in hierarchical zeolite synthesis
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 264, 15 April 2016, Pages 3–15
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis