Liquid-phase glycerol hydrogenolysis to 1,2-propanediol under nitrogen pressure using 2-propanol as hydrogen source

被引：121
作者：
Gandarias, I. [1 ]
Arias, P. L. [1 ]
Requies, J. [1 ]
El Doukkali, M. [1 ]
Gueemez, M. B. [1 ]
机构：
[1] Univ Basque Country, Sch Engn, Bilbao 48013, Spain
来源：
JOURNAL OF CATALYSIS | 2011年 / 282卷 / 01期
关键词：
Glycerol; Hydrogenolysis; Propanediol; Catalytic transfer hydrogenation; Ni-Cu/Al2O3; Hydride; CATALYTIC TRANSFER HYDROGENATION; ION-EXCHANGE-RESIN; AQUEOUS-SOLUTION; REDUCTION; METHANOL; SELECTIVITY; OXIDATION; ALUMINA; ACID;
D O I：
10.1016/j.jcat.2011.06.020
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
2-Propanol was studied as a hydrogen donor molecule in the transfer hydrogenation process to selectively convert glycerol into 1,2-propanediol under N-2 pressure and using Ni or/and Cu supported on Al2O3 catalysts. The results were compared to those obtained under the same operating conditions but under H-2 pressure. The results of the activity tests and catalyst characterization techniques (N-2-physisorption, H-2-chemisorption, TPD of NH3, TPR. TPO and XPS) suggest that glycerol hydrogenolysis to yield 1,2-propanediol occurred through a different mechanism regarding the origin of the hydrogen species. When atomic hydrogen came from dissolved molecular hydrogen dissociation, glycerol was first dehydrated to acetol and then hydrogenated to 1,2-propanediol. On the other hand, when the hydrogen atoms were produced from 2-propanol dehydrogenation, glycerol was directly converted to 1,2-propanediol through intermediate alkoxide formation. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：237 / 247
页数：11
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