|
个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：盘锦校区管委会副主任兼教学与科研工作部部长
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：工业催化. 物理化学
办公地点：化工实验楼B427
联系方式：18641143913
电子邮箱：guoxw@dlut.edu.cn
Ag/Al2O3 for glycerol hydrogenolysis to 1,2-propanediol: activity, selectivity and deactivation
点击次数：
论文类型：期刊论文
发表时间：2012-01-01
发表刊物：GREEN CHEMISTRY
收录刊物：SCIE、Scopus
卷号：14
期号：1
页面范围：156-163
ISSN号：1463-9262
摘要：A series of gamma-Al2O3 supported silver catalysts (Ag/Al2O3) prepared with various Ag loadings and calcination temperatures were used to convert glycerol to 1,2-propanediol. A catalyst with 2 mmol Ag per gram Al2O3 and calcined at 400-500 degrees C presented the highest activity (glycerol conversion 46 mol%) and selectivity (96 mol%) at 220 degrees C, glycerol/Ag (molar ratio) = 100/2, 1.5 MPa initial H-2 pressure and 10 h. Optimal prereduction, elevated reaction temperature and hydrogen pressure promote the activity, but the selectivity deteriorates at higher reaction temperatures. Excessive water is detrimental to the performance. Catalyst deactivation was observed, mainly due to Ag sintering under reducing environment. The spent catalyst could be calcined to fully recover the activity.