Chemical equilibrium controlled synthesis of polyoxymethylene dimethyl ethers over sulfated titania

作     者：Huaju Li Huanling Song Feng Zhao Liwei Chen Chungu Xia 

作者机构：Laboratory for Nano-Catalytic Material & Technology Division of Advanced Nano?materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical Physics Chinese Academy of Sciences i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2015年第24卷第2期

页      面：239-244页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(NSFC,No.21203220 and 21133011) China Postdoctoral Science Foundation(No.2014M551674) Jiangsu Planned Projects for Postdoctoral Research Funds(No.1302070C) the National Basic Research Program of China(973 Program,No.2011CB201404) 

主　　题：polyoxymethylene dimethyl ethers sulfated titania chemical equilibrium reaction kinetic molar ratio 

摘      要：The chemical equilibrium and reaction kinetic behavior in the synthesis of polyoxymethylene dimethyl ethers （DMMn） were investigated over sulfated titania in order to reveal the decisive factor controlling the reaction. The results showed that the molar ratio of adjacent DMMn products in equilibrium solution had the same value, which depended absolutely on the reaction temperature. Meanwhile, the reactions had the same DMMn products distributions under varied reaction conditions. The equilibrium constants of the related step-wise reactions for DMMn formation were equal, which were calculated based on the bulk compositions of the reaction solution. And thus, the selectivity to DMMn was mainly controlled by the chemical equilibrium, i.e., thermodynamic control. In brief, the present results provide some guidance for future synthesis of DMMn.