太原理工大学学报2017,Vol.48Issue(5):717-722,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.05.003
双金属改性ZSM-5分子筛上甲醇合成二甲醚的DFT研究
DFT Study of Dimethyl Ether Synthesis from Methanol on HZSM-5 Modified with Double Metals
摘要
Abstract
In the present work,we employed periodic DFT-GGA calculation method and double 5T cluster model to compare the influence of ZrOZn,ZrOAl,ZrOMg and ZrOGa models on methanol dehydration to dimethyl ether.It was found that:the activation energies on four configurations are 1.09,0.89,0.93,0.90 eV,being helpful for dimethyl ether synthesis;path 3 (CH3OH+CH3OH→CH3O(H)CH3+OH→CH3OCH3+H2O)for direct methanol dehydration to dimethyl ether in three possible paths is the best path.The research has some guidance for searching modified double-metal catalysts.关键词
双金属改性/簇模型/二甲醚/密度泛函理论Key words
double metal modification/cluster model/dimethyl ether/density functional theory分类
化学化工引用本文复制引用
李岩,左志军,吕永康,任瑞鹏..双金属改性ZSM-5分子筛上甲醇合成二甲醚的DFT研究[J].太原理工大学学报,2017,48(5):717-722,6.基金项目
国家自然科学基金资助项目:杂原子改性的Al-MFI分子筛作用下MTH反应体系中积碳问题的理论研究(21406154) (21406154)
山西省自然科学基金:MTG过程中催化反应机理及催化剂制备技术研究(2013021007-5) (2013021007-5)
太原理工大学校青年基金:MTG过程中催化反应机理研究(2012L041)和合成气制汽油过程中催化剂作用机理研究(2013T092) (2012L041)