Effects of Different Al<sub>2</sub>O<sub>3</sub> Supports on Pt/WO<sub><i>x</i></sub>-Based Catalysts for Selective Hydrogenolysis of Glucose to 1,2-Propylene Glycol
Zhuoran Wang, Wenjia Li, Zhou Zhang, Lili Jia, Jia Wang
Abstract
The hydrogenolysis of glucose to 1,2-propylene glycol (1,2-PG) has become a powerful and practical approach to using biomass resources. A series of Pt (2%)/WO x (7.5%) catalysts supported on different kinds of γ-Al 2 O 3 were prepared by stepwise incipient wetness impregnation. The effects of Al 2 O 3 supports on the physicochemical parameters and catalytic capabilities of catalysts used in the hydrogenolysis of glucose to 1,2-PG were investigated. Subsequently, an attempt was made to relate the catalytic activities to the structures of the W species. When Nano-Al 2 O 3 was used as the support, the Pt/WO x /Nano-Al 2 O 3 catalyst demonstrated the best performance, yielding 55.8% 1,2-PG after heating at 245 °C for 1 h. The excellent performance of the Pt/WO x /Nano-Al 2 O 3 catalyst was attributed to the high dispersion of the Pt center and the optimal W species structure on the catalyst surface (monodisperse W species coexisting with the polymerized W species).