Affecting the Formation of the Micro‐structure and Meso/macro‐structure of SAPO‐34 zeolite by Amphipathic Molecules
作者:Xuefeng Shen、Yujue Du、Jiajia Ding、Chuanming Wang、Hongxing Liu、Weimin Yang、Zaiku Xie
DOI:10.1002/cctc.202000794
日期:2020.10.6
SAPO‐34 is an important member in the family of zeolites, which shows excellent catalytic activity in MTO reaction, but suffers from the diffusion bottleneck. To overcome the diffusion problem, porogen was added to generate meso/macro pores in SAPO‐34 zeolite. In this work, amphipathic molecules were designed as CSDA to synthesize a tri‐level hierarchically porous SAPO‐34, and the introduction of CSDA
SAPO-34是分子筛家族中的重要成员,它在MTO反应中显示出出色的催化活性,但存在扩散瓶颈。为克服扩散问题,添加了致孔剂以在SAPO-34沸石中产生细孔/大孔。在这项工作中,将两亲性分子设计为CSDA,以合成三级层次多孔SAPO-34,并且CSDA的引入可以促进Si原子掺入AlPO 4骨架,改变颗粒的形态并降低所制备的酸度。 SAPO-34沸石。制备的SAPO-34催化剂对C 2 H 4和C 3 H 6的选择性更高在MTO反应中比传统的SAPO-34沸石要好。由于两亲分子与CHA的拓扑结构之间的匹配,所制备样品的形态和微观结构随两亲分子的碳链而变化。