Prasomsri Teerawit, Jiao Wenqian, Weng Steve Z, Garcia Martinez Javier
Rive Technology, Inc., 1 Deer Park Drive, Monmouth Junction, NJ 08852, USA.
Chem Commun (Camb). 2015 May 28;51(43):8900-11. doi: 10.1039/c4cc10391b.
Surfactant-templating is one of the most versatile and useful techniques to implement mesoporous systems into solid materials. Various strategies based on various interactions between surfactants and solid precursors have been explored to produce new structures. Zeolites are invaluable as size- and shape-selective solid acid catalysts. Nevertheless, their micropores impose limitations on the mass transport of bulky feed and/or product molecules. Many studies have attempted to address this by utilizing surfactant-assisting technology to alleviate the diffusion constraints. However, most efforts have failed due to micro/mesopore phase separation. Recently, a new technique combining the uses of cationic surfactants and mild basic solutions was introduced to synthesise mesostructured zeolites. These materials sustain the unique characteristics of zeolites (i.e., strong acidity, crystallinity, microporosity, and hydrothermal stability), including tunable mesopore sizes and degrees of mesoporosity. The mesostructured zeolites are now commercially available through Rive Technology, and show superior performance in VGO cracking. This feature article provides an overview of recent explorations in the introduction of mesoporosity into zeolites using surfactant-templating techniques. Various porous materials, preparation methods, physical and catalytic properties of mesostructured zeolites will be discussed.
表面活性剂模板法是将介孔体系引入固体材料中最通用且有用的技术之一。人们已经探索了基于表面活性剂与固体前驱体之间各种相互作用的多种策略来制备新结构。沸石作为尺寸和形状选择性固体酸催化剂非常重要。然而，它们的微孔对大分子原料和/或产物分子的传质造成了限制。许多研究试图通过利用表面活性剂辅助技术来缓解扩散限制来解决这个问题。然而，由于微/介孔相分离，大多数努力都失败了。最近，一种结合使用阳离子表面活性剂和温和碱性溶液的新技术被引入来合成介孔结构沸石。这些材料保留了沸石的独特特性（即强酸性、结晶度、微孔性和水热稳定性），包括可调节的介孔尺寸和介孔率。介孔结构沸石目前可通过Rive Technology公司进行商业生产，并且在减压瓦斯油裂化中表现出优异的性能。这篇专题文章概述了近期使用表面活性剂模板技术将介孔性引入沸石的探索情况。将讨论各种多孔材料、介孔结构沸石的制备方法、物理性质和催化性能。
