期刊
MOLECULAR CATALYSIS
卷 446, 期 -, 页码 152-160出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.12.038
关键词
Sorbitol; Xylitol; Polyol; Erythritol; Glycerol; Ethanol; Hydrogenolysis; Heterogeneous catalysis; Palladium; Bimetallic Pd-Fe system
The hydrogenolysis of sorbitol and various C5-C3 polyols (xylitol; erythritol; 1,2- 1,4- and 2,3-butandiol; 1,2-propandiol; glycerol) have been investigated at low molecular hydrogen pressure (5 bar) by using Pd/Fe3O4, as heterogeneous catalyst and water as the reaction medium. Catalytic experiments show that the carbon chain of polyols is initially shortened through dehydrogenation/decarbonylation and dehydrogenation/retro-aldol mechanisms followed by a series of cascade reactions that include dehydrogenation/decarbonylation and dehydration/hydrogenation processes. At 240 degrees C, sorbitol is fully converted into lower alcohols with ethanol being the main reaction product in liquid phase. (C) 2017 Elsevier B.V. All rights reserved.
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