Journal of Energy Chemistry
Journal of Energy Chemistry
5 years ago

Efficient one-pot hydrogenolysis of biomass-derived xylitol into ethylene glycol and 1,2-propylene glycol over Cu-Ni-ZrO2 catalyst without solid bases

The directly selective hydrogenolysis of xylitol to ethylene glycol (EG) and 1,2-propylene glycol (1,2-PDO) was performed on Cu-Ni-ZrO2 catalysts prepared by a co-precipitation method. Upon optimizing the reaction conditions (518 K, 4.0 MPa H2 and 3 h), 97.0% conversion of xylitol and 63.1% yield of glycols were obtained in water without extra inorganic base. The catalyst still remained stable activity after six cycles and above 80% total selectivity of glycols was obtained when using 20.0% xylitol concentration. XRD, TEM and ICP results indicated that Cu-Ni-ZrO2 catalysts possess favorable stability. Cu and Ni are beneficial to the cleavage of C–O and C–H bond respectively. To reduce the hydrogen consumption, isopropanol was added as in-situ hydrogen source and 96.4% conversion of xylitol with 43.6% yield of glycols were realized.

Publisher URL: www.sciencedirect.com/science

DOI: S2095495617311683

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