The basis and contribution of mesopores created in ZSM-5 structures at different treatment conditions are systematically investigated. The results reveal that the mesopores originated from the alkali dissolution of pristine ZSM-5 are mainly intracrystalline and they contribute to excessive Brønsted acid sites, while the mesopores originated from the re-assembly of alkali dissolved aluminosilicate species possess Lewis acid sites. These ZSM-5 mesostructures showed an extended lifespan during the cracking of cumene (88.0%) in comparison to the pristine ZSM-5 (27.0%) after 460 min. The zeolite mesostructures obtained in this study could be used as a base for further design of new porous materials with desired acidic properties.

系统研究了在不同处理条件下在ZSM-5结构中产生的中孔的基础和作用。结果表明，源自原始ZSM-5碱溶解的中孔主要是晶内的，它们导致了过量的布朗斯台德酸位，而源自碱溶解的铝硅酸盐物种的重新组装而产生的中孔具有路易斯酸位。与460分钟后的原始ZSM-5（27.0％）相比，这些ZSM-5介孔结构在异丙苯裂化期间的寿命延长（88.0％）。在这项研究中获得的沸石介孔结构可以用作进一步设计具有所需酸性性质的新型多孔材料的基础。