Sorbitol hydrogenolysis to glycerol and glycols over M-MgO (M = Ni, Co, Cu) nanocomposite: A comparative study of active metals

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• 作者：Xicheng Wang^a ; Xiaoran Liu^a ; ^b ; Yue Xu^c ; Gongming Peng^a ; Quan Cao^a ; Xindong Mu^a ; ^{muxd@qibebt.ac.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Biomass ; Hydrogenolysis ; Sorbitol ; Magnesia ; Supported metal catalyst ; Bifunctional catalyst
• 刊名：Chinese Journal of Catalysis
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：36
• 期：9
• 页码：1614-1622
• 全文大小：1397 K

文摘

The activities and selectivities of MgO-supported Ni, Cu, and Co catalysts have been compared in aqueous-phase hydrogenolysis of sorbitol to glycerol and glycols. All catalysts effectively catalyzed the sorbitol conversion into C2 and C3 polyols like glycerol, 1,2-propylene glycol, and ethylene glycol, but with different product distributions. The differences in activities and selectivities are ascribed to their different dehydrogenation/hydrogenation activities. The influences of base promoter, temperature, H₂ pressure, and reaction time were also studied. Added base promoter and prolonged reaction time enhanced sorbitol conversion for the three catalysts, but led to product degradation and decreased selectivity over Ni-MgO and Co-MgO, whereas selectivity maintained almost unchanged over Cu-MgO.