多级孔分子筛制备方法研究进展

摘要/Abstract

摘要： 分子筛独特的拓扑结构赋予这一类材料优异的骨架酸性、离子交换性能、稳定性以及形状选择性，在石油化工、精细化工等领域有着广泛的应用。然而，晶体结构的存在也将分子筛孔径限制在微孔尺寸，进而影响扩散效率，限制了其在催化反应中的适用范围。在分子筛中构建多级孔结构可有效缩短扩散距离。到目前为止，多级孔结构的构建可分为“自上而下”与“自下而上”两种策略。本文就上述两种策略及其对介孔的影响进行了归纳和总结。

关键词: 多级孔, 分子筛, 相对结晶度, 扩散效率, 开放型介孔

Abstract: Zeolites have been widely used in petrochemical industry and fine chemical industry because of their unique topological structure, which endows them with excellent framework acidity, ion-exchange performance, stability and shape selectivity. However, the existence of crystal structure limits the pore size of zeolites to microporous size, which affects the diffusion efficiency and limits their scope of application in catalytic reactions. The diffusion distance can effectively shorten by constructing hierarchical porous structures in zeolites. So far, the strategies for constructing hierarchical porous structures could be divided into two strategies: "top-down" and "bottom-up". In this paper, the above two strategies and their effects on mesopores were summarized.

Key words: hierarchical pore, zeolite, relative crystallinity, diffusion efficiency, open mesopores

沈宇李明丰朱强强褚阳. 多级孔分子筛制备方法研究进展[J]. 石油炼制与化工, 2023, 54(2): 108-116.

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