caa a22 4500 463253957 CHVBK 20180405153349.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10562-007-9106-9 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9106-9 Selective hydrogenolysis of glycerol to propylene glycol on Cu-ZnO catalysts [Elektronische Daten] [Shuai Wang, Haichao Liu] Hydrogenolysis of biomass-derived glycerol is an alternative route to sustainable production of propylene glycol. Cu-ZnO catalysts were prepared by coprecipitation with a range of Cu/Zn atomic ratio (0.6-2.0) and examined in glycerol hydrogenolysis to propylene glycol at 453-513K and 4.2MPa H2. These catalysts possess acid and hydrogenation sites required for bifunctional glycerol reaction pathways, most likely involving glycerol dehydration to acetol and glycidol intermediates on acidic ZnO surfaces, and their subsequent hydrogenation on Cu surfaces. Glycerol hydrogenolysis conversions and selectivities depend on Cu and ZnO particle sizes. Smaller ZnO and Cu domains led to higher conversions and propylene glycol selectivities, respectively. A high propylene glycol selectivity (83.6%), with a 94.3% combined selectivity to propylene glycol and ethylene glycol (also a valuable product) was achieved at 22.5% glycerol conversion at 473K on Cu-ZnO (Cu/Zn=1.0) with relatively small Cu particles. Reaction temperature effects showed that optimal temperatures (e.g. 493K) are required for high propylene glycol selectivities, probably as a result of optimized adsorption and transformation of the reaction intermediates on the catalyst surfaces. These preliminary results provide guidance for the synthesis of more efficient Cu-ZnO catalysts and for the optimization of reaction parameters for selective glycerol hydrogenolysis to produce propylene glycol. Springer Science+Business Media, LLC, 2007 selective hydrogenolysis nationallicence glycerol nationallicence propylene glycol nationallicence Cu-Zn catalysts nationallicence Wang Shuai National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Stable and Unstable Species, College of Chemistry and Molecular Engineering, Green Chemistry Center, Peking University, 100871, Beijing, China aut Liu Haichao National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Stable and Unstable Species, College of Chemistry and Molecular Engineering, Green Chemistry Center, Peking University, 100871, Beijing, China aut Catalysis Letters Springer US; http://www.springer-ny.com 117/1-2(2007-08-01), 62-67 1011-372X 117:1-2<62 2007 117 10562 https://doi.org/10.1007/s10562-007-9106-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9106-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Shuai National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Stable and Unstable Species, College of Chemistry and Molecular Engineering, Green Chemistry Center, Peking University, 100871, Beijing, China aut NATIONALLICENCE 700 1- Liu Haichao National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Stable and Unstable Species, College of Chemistry and Molecular Engineering, Green Chemistry Center, Peking University, 100871, Beijing, China aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 117/1-2(2007-08-01), 62-67 1011-372X 117:1-2<62 2007 117 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer