Abstract:

Hierarchical zeolite materials, which inherit the excellent catalytic activity and shape selectivity from microporous zeolites, could substantially enhance the mass transfer and diffusion efficiency, therefore, the catalyst deactivation due to carbon deposition could be greatly improved. Herein, a general overview of hierarchical zeolite materials in the preparation methods and catalytic application is provided. According to the difference in pore size, three types of zeolite materials with hierarchically porous structures are particularly dwelled on, including micro-mesoporous zeolite materials, micro-macroporous zeolite materials, and micro-meso-macroporous zeolite materials. Moreover, this review gives a comprehensive analysis of the pros and cons of the materials mentioned above from the perspectives of performance, cost, operability, and applicability, and points out the future improvement direction of hierarchical zeolite materials. The rational design and controllable preparation of the zeolite materials with hierarchical pore systems, which are well-communication inside to maximize the catalytic efficiency, will be a vital research focus in the field of hierarchical zeolite materials.

Key words: zeolite, multiscale, 3D printing, tailored, multiphase reaction

摘要：

多级孔沸石分子筛在保留了微孔沸石优异的催化活性与择形性的同时，能够从本质上大幅提升沸石分子筛的传质与扩散效率，改善催化剂因积炭问题失活较快的弊端。本文介绍了当前阶段多级孔沸石分子筛的研究现状，主要基于孔径大小的差异，重点综述了微孔-介孔、微孔-大孔以及微孔-介孔-大孔三类具有多级孔道结构的沸石分子筛在制备及催化应用方面的最新研究进展，综合分析了各种制备方法在性能、成本、可操作性及应用上的利弊关系，并且指出，设计并可控地制备出具有多级孔道结构且在三维空间高度贯通的多级孔沸石分子筛材料以最大限度地提高催化效率，将会是未来多级孔沸石分子筛领域的研究重点。

关键词: 沸石, 多尺度, 3D打印, 量体裁衣, 多相反应