Ag/Al2O3 for glycerol hydrogenolysis to 1,2-propanediol: activity, selectivity and deactivation
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Zhou, Jinxia
- 通讯作者：
- Zhou, JX (reprint author), Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China.
- 合写作者：
- Zhang, Jing,Guo, Xinwen,Mao, Jingbo,Zhang, Shuguang
- 发表时间：
- 2012-01-01
- 发表刊物：
- GREEN CHEMISTRY
- 收录刊物：
- SCIE、Scopus
- 文献类型：
- J
- 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.
- 是否译文：
- 否
