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Glycerol Hydrogenolysis to 1,2-Propanediol over Novel Cu/ZrO2 Catalysts

handle: 11588/867743 , 20.500.14243/443495
Glycerol is the main by-product of biodiesel production; its upgrading to more valuable products is a demanding issue. Hydrogenolysis to 1,2-propanediol is one of the most interesting processes among the possible upgrading routes. In this study, we propose novel copper/zirconia catalysts prepared by advanced preparation methods, including copper deposition via metal–organic framework (MOF) and support preparation via the sol–gel route. The catalysts were characterized by N2 physisorption, X-ray diffraction, Scanning Electron Microscopy, H2-TPR and NH3-TPD analyses and tested in a commercial batch reactor. The catalyst prepared by copper deposition via MOF decomposition onto commercial zirconia showed the best catalytic performance, reaching 75% yield. The improved catalytic performance was assigned to a proper combination of redox and acid properties. In particular, a non-negligible fraction of cuprous oxide and of weak acid sites seems fundamental to preferentially activate the selective pathway. In particular, these features avoid the overhydrogenolysis of 1,2-propanediol to 1-propanol and enhance glycerol dehydration to hydroxyacetone and the successive hydrogenation of hydroxyacetone to 1,2-propanediol.
Glycerol, 2-propanediol, 1,2-propanediol; Biodiesel; Copper; Glycerol; Hydrogenolysis; MOF; MOF-mediated synthesis route (MOFMS); Sol–gel; Zirconia, 1, MOF-mediated synthesis route (MOFMS), glycerol, TP1-1185, Sol–gel, QD1-999, MOF, Sol-gel, Chemical technology, glycerol; 1,2-propanediol; copper; zirconia; MOF; MOF-mediated synthesis route (MOFMS); sol–gel; hydrogenolysis; biodiesel, Chemistry, copper, Zirconia, 1,2-propanediol, Biodiesel, Hydrogenolysis, zirconia, Copper
Glycerol, 2-propanediol, 1,2-propanediol; Biodiesel; Copper; Glycerol; Hydrogenolysis; MOF; MOF-mediated synthesis route (MOFMS); Sol–gel; Zirconia, 1, MOF-mediated synthesis route (MOFMS), glycerol, TP1-1185, Sol–gel, QD1-999, MOF, Sol-gel, Chemical technology, glycerol; 1,2-propanediol; copper; zirconia; MOF; MOF-mediated synthesis route (MOFMS); sol–gel; hydrogenolysis; biodiesel, Chemistry, copper, Zirconia, 1,2-propanediol, Biodiesel, Hydrogenolysis, zirconia, Copper
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