Hierarchical SAPO-34 aggregates were hydrothermally synthesized with the assistance of organosilane N-[3-(Trimethoxysilyl)propyl]ethylenediamine (TPED), during which the morpholine was used as the template. The resultant products were characterized by XRD, SEM, ICP-OES, NH₃-TPD, N₂ adsorption-desorption and TGA, and a possible formation mechanism was proposed. As the amount of added TPED varies, the morphologies, compositions and acid properties of the resultant hierarchical SAPO-34 aggregates differ. The hierarchical SAPO-34 aggregates possessed higher external surface areas, lower Si content, weaker strength and lower concentration in the strong acid sites than the conventional SAPO-34. The investigation of formation process showed that the addition of the TPED had a pivotal role for the formation of hierarchical SAPO-34 aggregates. Compared to conventional SAPO-34, the hierarchical SAPO-34 aggregates exhibited a significant improvement in methanol to olefin reaction (MTO) reactions due to their hierarchical structure and mild acid properties.

在有机硅烷N- [3-（三甲氧基甲硅烷基）丙基]乙二胺（TPED）的辅助下，水热合成SAPO-34分层聚集体，其间以吗啉为模板。所得产物通过XRD，SEM，ICP-OES，NH ₃ -TPD，N ₂进行表征。吸附-解吸和TGA，并提出了可能的形成机理。随着TPED添加量的变化，所得分层SAPO-34聚集体的形态，组成和酸性质也有所不同。与常规的SAPO-34相比，分层的SAPO-34聚集体具有较高的外表面积，较低的Si含量，较弱的强度和在强酸位置的浓度。对形成过程的研究表明，TPED的添加对于分层SAPO-34聚集体的形成具有关键作用。与常规的SAPO-34相比，分层的SAPO-34聚集体由于其分层结构和弱酸性质而在甲醇制烯烃反应（MTO）反应中显示出显着的改进。