Citation: Chuang Li, Bo He, Yu Ling, Chi-Wing Tsang, Changhai Liang. Glycerol hydrogenolysis to n-propanol over Zr-Al composite oxide-supported Pt catalysts[J]. Chinese Journal of Catalysis, ;2018, 39(6): 1121-1128. doi: 10.1016/S1872-2067(18)63068-2 shu

Glycerol hydrogenolysis to n-propanol over Zr-Al composite oxide-supported Pt catalysts

a Laboratory of Advanced Materials and Catalytic Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
b Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Hong Kong 50011, China

Received Date: 29 January 2018
Revised Date: 22 March 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21573031, 21373038), the Program for Excellent Talents in Dalian City (2016RD09), and the Doctoral Scientific Research Foundation of Liao Ning Province (20170520395).

Zr-Al mixed oxide supported Pt catalysts with different Zr/Al mole ratios (2.5%Pt/Zr_xAl_1-xO_y) were synthesized by an impregnation method and used for the selective hydrogenolysis of glycerol to n-propanol in an autoclave reactor. The catalysts were fully characterized by X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, CO chemisorption, H₂ temperature-programmed reduction, pyridine-infrared spectroscopy, and NH₃-temperature-programmed desorption. The results revealed that the Zr/Al ratio on the support significantly affected the size of the platinum particles and the properties of the acid sites on the catalysts. The catalytic performance was well correlated with the acidic properties of the catalyst; specifically, more acid sites contributed to the conversion and strong acid sites with a specific intensity contributed to the deep dehydration of glycerol to form n-propanol. Among the tested catalysts, 2.5 wt% Pt/Zr_0.7Al_0.3O_y exhibited excellent selectivity for n-propanol with 81.2% glycerol conversion at 240℃ and 6.0 MPa H₂ pressure when 10% aqueous glycerol solution was used as the substrate. In addition, the effect of various reaction parameters, such as H₂ content, reaction temperature, reaction time, and number of experimental cycles were studied to determine the optimized reaction conditions and to evaluate the stability of the catalyst.
- Glycerol hydrogenolysis,
- n-Propanol,
- Pt-based catalyst,
- Zr-Al composite oxide,
- Zr/Al ratio
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