URBANREC

Hydrogenation is one of useful processes in the high valorization of biomass and the non-precious nickel based catalyst is one of promising catalysts owing to its high activity and low cost. Herein, we present a systematic investigation on the preparation, characterization and catalytic property of Ni/Nb2O5-SiO2(x) catalysts in hydrogenation of palmitic acid as a probe reaction. Ni/Nb2O5-SiO2(x) of varying Nb compositions (x = 5, 10 and 20, weight percent of Nb2O5) are employed to understand any possible support effect. Kinetic assessments of hydrogenation reaction are conducted to gain information on the catalytic mechanism and synergy effect between Ni and NbOx in Ni/Nb2O5-SiO2(x) catalysts. Kinetic study shows a higher proportion of NbOx could lower the activation energy apparently and pre-exponential factor as well. The overall reaction rate step is the Langmuir-Hinshelwood surface reaction between independently adsorbed palmitic acid and H atoms.

» Author: Shenzhi Yue, Lin Dong, Xiaohui Liu, Yong Guo, Yanqin Wang

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