Innovations in hierarchical zeolite synthesis
Innovations in hierarchical zeolite synthesis
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DOI：
10.1016/j.cattod.2015.08.012
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发表时间：
2016-04
期刊：
影响因子：
5.3
通讯作者：
Ke Zhang;M. Ostraat
中科院分区：
文献类型：
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作者：
Ke Zhang;M. Ostraat
人们对研究和开发具有至少两个孔隙度水平的分级沸石以减少微孔沸石催化的反应中的扩散限制越来越感兴趣。需要对孔结构的层次结构进行工程设计和操纵，以促进大反应物的运输并改善沸石催化剂中活性位点的可及性。已经提出和开发了各种策略和方法，以便为常规沸石引入通常在中孔范围内的次生孔隙率。从可控的合成后改性到有或无介孔模板剂的设计直接合成，在过去几年中在制备分级沸石方面取得了显著进展。本文综述了近年来合成分级沸石的新方法，包括合成后脱金属、硬模板法、软模板法和无模板法。我们还将分别讨论二维（2D）沸石纳米片衍生的分级结构的进展。最后，对该领域的发展进行了总结和展望，并提出了该领域的产业前景。
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.