Surface dealumination of micro-sized ZSM-5 for improving propylene selectivity and catalyst lifetime in methanol to propylene (MTP) reaction
Surface dealumination of micro-sized ZSM-5 for improving propylene selectivity and catalyst lifetime in methanol to propylene (MTP) reaction
复制标题
DOI：
10.1016/j.catcom.2018.02.005
复制
发表时间：
2018-05
影响因子：
3.7
通讯作者：
Rui Feng;Xinlong Yan;Xiaoyan Hu;Zifeng Yan;Jiawei Lin;Zheng Li;K. Hou;M. Rood
中科院分区：
文献类型：
--
作者：
Rui Feng;Xinlong Yan;Xiaoyan Hu;Zifeng Yan;Jiawei Lin;Zheng Li;K. Hou;M. Rood
在去除甲醇制丙烯（MTP）反应的模板之前，通过两阶段葡萄糖辅助结晶和选择性表面脱铝工艺成功制备了新型微米级 ZSM-5 沸石。通过 XRD、XPS、SEM、FTIR 和 NMR 分析对所制备的 ZSM-5 的结构和晶体性质进行了表征。结果表明，新型微米级晶体ZSM-5沸石比传统纳米级晶体ZSM-5沸石在提高MTP反应中丙烯选择性方面具有更好的性能。模板去除前的表面脱铝明显降低了MTP反应中表面铝原子的浓度，并显着提高了催化剂的寿命。
Novel micro-sized ZSM-5 zeolite was successfully prepared by a two-stage glucose-assisted crystallization and a selective surface dealumination process before removing the templates for methanol to propylene (MTP) reaction. The structural and crystalline properties of the as-prepared ZSM-5 were characterized by XRD, XPS, SEM, FTIR, and NMR analyses. Results showed that novel ZSM-5 zeolites with micro-sized crystals had better performances in improving the propylene selectivity in the MTP reaction than those conventional ZSM-5 zeolites with nano-sized crystals. The surface dealumination before the template removal obviously decreased the concentrations of surface aluminum atoms and significantly improved lifetime of catalysts in MTP reaction.