磷酸锆催化甘油气相脱水制备丙烯醛(英文)  

Gas phase dehydration of glycerol to acrolein catalyzed by zirconium phosphate

作　　者：干慧媚 赵秀阁[1] 宋宝宁[1] 郭立[1] 张然[1] 陈晨[1] 陈吉忠[1] 朱闻闻[1] 侯震山[1] 

机构地区：[1]华东理工大学工业催化研究所、结构可控先进功能材料及其制备教育部重点实验室,上海200237

出　　处：《催化学报》2014年第7期1148-1156,共9页

基　　金：supported by the National Natural Science Foundation of China (U1179302,21373082,21073058);the Specialized Research Fund for the Doctoral Program of Higher Education (20100074110014);the Fundamental Research Funds for the Central Universities~~

摘　　要：以沉淀法、水热合成法和浸渍法制备了磷酸锆催化剂,通过X射线衍射、热重分析、氮气物理吸附、红外光谱和Hammett指示剂法对催化剂进行了表征,并将该催化剂用于甘油气相脱水反应.研究表明,由沉淀法得到的磷酸锆经过400°C焙烧后能达到最佳催化活性,在温和条件下,甘油可完全转化,丙烯醛选择性为81%,反应24h内催化剂失活不明显.不同方法制备的磷酸锆其结构和表面酸性显著不同,催化剂表面酸性对催化剂活性、丙烯醛选择性和催化剂的寿命均有较大影响.Zirconium phosphates were prepared by precipitation, hydrothermal synthesis, and impregnation methods and were characterized by X-ray diffraction, thermogravimetric analysis, nitrogen adsorption, Fourier transform infrared spectroscopy, and Hammett indicators. The different preparation methods have crucial effects on the texture and surface acidity of the zirconium phosphates. The zirconium phosphates were employed as catalysts for the gas phase dehydration of glycerol under mild reaction conditions. The zirconium phosphates from the precipitation method afforded the highest activity with the complete conversion of glycerol, 81% selectivity to acrolein, and no obvious deactivation over 24 h. Surface acidic sites played an important role in the activity, selectivity to acrolein, and life of catalysts.

关 键 词：甘油 脱水 丙烯醛 磷酸锆 酸性 

分 类 号：TQ224.13[化学工程—有机化工]