Direct synthesis of b-axis oriented H-form ZSM-5 zeolites with an enhanced performance in the methanol to propylene reaction
Direct synthesis of b-axis oriented H-form ZSM-5 zeolites with an enhanced performance in the methanol to propylene reaction
复制标题
直接合成 b 轴取向 H 型 ZSM-5 沸石，在甲醇制丙烯反应中具有增强的性能
DOI：
10.1016/j.micromeso.2020.110246
复制
发表时间：
2020-08-01
影响因子：
5.2
通讯作者：
Yan, Zifeng
中科院分区：
文献类型：
--
作者：
Feng, Rui;Yan, Xinlong;Yan, Zifeng
A b-axis oriented microsized H-form ZSM-5 zeolite with a thinness of approximately 300-500 nm along the b-axis direction was prepared for the methanol to propylene (MTP) reaction by a two stage hydrothermal crystallization method with ammonium hydroxide as the base source and glucose as an additive. Ammonium hydroxide contributed to the direct synthesis of H-form ZSM-5 zeolite after calcination to remove the template and decompose the NH4+-form zeolite, thus removing the need for further ion-exchange and calcination steps. Glucose was beneficial to the formation of the thin hierarchical b-axis oriented ZSM-5 zeolites. The b-axis oriented H-form ZSM-5 catalyst exhibited a longer catalyst lifetime and a higher propylene selectivity in the MTP reaction compared to that of ZSM-5 made by a conventional method. The better catalytic performance was ascribed to the relatively low content of strong acid sites especially those on the external surface of the b-axis oriented microsized ZSM-5 catalyst.
