SSZ-39 zeolite with AEI framework structure is a good catalyst candidate for the methanol-to-olefins (MTO) reaction. However, the diffusion limitation and coke formation often results in fast deactivation of the SSZ-39 zeolite catalyst. One solution for this challenge is to introduce mesoporosity in the SSZ-39 zeolite. Herein, we report the synthesis of mesoporous SSZ-39 zeolite using an organosilane surfactant, N,N-dimethyl-N-(3-(trimethoxysilyl)propyl)octan-1-aminium chloride, as a mesopore template and N,N-dimethyl-cis-2,6-dimethylpiperidinium as a micropore template. The obtained zeolites were characterized by X-ray diffraction, N₂ sorption, scanning electron microscopy, temperature programmed desorption of ammonia, and magic angle spinning nuclear magnetic resonance of ²⁷Al. The results show that the mesoporous SSZ-39 zeolite has high crystallinity, meso/microporosity, high surface area, cuboid morphology, and abundant acidic sites. More importantly, this mesoporous SSZ-39 zeolite exhibits enhanced catalyst lifetime in the MTO reaction due to the presence of mesoporosity for fast mass transfer, compared with a conventional SSZ-39 zeolite without mesoporosity.

具有AEI骨架结构的SSZ-39沸石是甲醇制烯烃（MTO）反应的良好催化剂候选物。然而，扩散限制和焦炭形成经常导致SSZ-39沸石催化剂的快速失活。解决这一挑战的一种方法是在SSZ-39沸石中引入介孔性。本文中，我们报道了使用有机硅烷表面活性剂，N，N-二甲基-N-（3-（三甲氧基甲硅烷基）丙基）辛-1-氯化铵作为中孔模板和N，N-二甲基沸石合成介孔SSZ-39沸石的方法。-顺式-2，6-二甲基哌啶作为微孔模板。所得沸石通过X射线衍射，N ₂表征。吸附，扫描电子显微镜，程序升温的氨解吸和²⁷ Al的魔角旋转核磁共振。结果表明，介孔SSZ-39沸石具有高结晶度，介孔/微孔率，高表面积，长方体形态和丰富的酸性位点。更重要的是，与无介孔性的常规SSZ-39沸石相比，由于介孔性的存在，该介孔SSZ-39沸石在MTO反应中显示出更长的催化剂寿命。