Abstract Conventional bottom-up and top-down methods for synthesizing hierarchical zeolite have led to complicated economic and environmental issues due to the requirement of expensive and hazardous organic molecules, the large amount of acid/base solution, high energy, and expensive starting materials. Besides, the bottom-up method through the hydrothermal crystallization evokes safety issues due to the high autogenous pressure. Accordingly, considerable efforts have been made to develop green route synthesis of hierarchical zeolite by eliminating the use of a solvent (solvent-free), utilizing sustainable starting materials and green secondary template (mesoporogen), as well as eliminating the use of mesoporogen (mesoporogen-free). Other routes, including recycling of mother liquor, steam-assisted conversion, gel-like-solid phase method, and silanization, are also elaborated, as they are reported to promote a green and facile approach for the synthesis of hierarchical zeolites. In this review, we provide recent progress on the development of the green synthesis of hierarchically porous zeolite.

中文翻译：

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分级多孔沸石的绿色合成研究进展

摘要 由于需要昂贵和危险的有机分子、大量的酸/碱溶液、高能量和昂贵的起始材料，用于合成分级沸石的常规自下而上和自上而下的方法导致复杂的经济和环境问题。此外，由于自生压力高，通过水热结晶的自下而上方法会引起安全问题。因此，通过消除溶剂（无溶剂）的使用，利用可持续的起始材料和绿色二级模板（介孔原），以及消除使用介孔原（介孔原），已经做出了相当大的努力来开发分级沸石的绿色路线合成。 -自由）。其他路线，包括母液回收、蒸汽辅助转化、类凝胶固相法、还详细阐述了硅烷化和硅烷化，因为据报道它们促进了用于合成分级沸石的绿色和简便方法。在这篇综述中，我们提供了分级多孔沸石绿色合成发展的最新进展。