Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 302, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120870
Keywords
Glycerol; Hydrogenolysis; Ethanol; Pd; CoOx; Cu; SBA-15
Funding
- National Natural Science Foundation of China [21878321]
- Key Research and Development Program of Shandong Province [2018GGX107010]
- Natural Science Foundation of Shandong Province [ZR2020MB030, ZR2018LB030]
- Natural Science Foundation for Youth Scholars of Shandong Province [ZR2020QB049]
- Yulin University [2021005]
- Dalian National Laboratory for Clean Energy (YLU-DNL Fund) [2021005]
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The study demonstrated that Pd/CoOx catalyst showed high ethanol selectivity and reusability in direct hydrogenolysis of glycerol to ethanol, with the assistance of Cu/SBA-15 as co-catalyst to enhance ethanol yield and inhibit catalyst aggregation. Synergistic catalysis of Pd/CoOx and Cu/SBA-15 achieved a record ethanol yield of 84.5% in glycerol hydrogenolysis reactions.
Direct hydrogenolysis of glycerol to ethanol in liquid phase was studied for the first time in this work, and the results showed that Pd/CoOx gave high ethanol selectivity and good reusability. The reaction pathways were thoroughly investigated, and it was found that ethanol was mainly produced by consecutive hydrogenolysis of glycerol with 1,2-propanediol as intermediate. More importantly, PdCo alloy was identified as the main active site for ethanol production from glycerol by in situ XRD, TEM, H2-TPR, XPS and controlled experiments. Remarkably, Cu/SBA-15 was employed as co-catalyst to adjust the reaction routes and inhibit Pd/CoOx aggregation. By synergistic catalysis of Pd/CoOx and Cu/SBA-15, the yield of ethanol then reached to 84.5%, which is the highest value ever reported in glycerol hydrogenolysis reactions.
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