硅钨酸
水滑石
氢解
催化作用
甘油
化学
选择性
插层(化学)
离子交换
核化学
无机化学
物理吸附
布朗斯特德-洛瑞酸碱理论
有机化学
离子
作者
Ruiping Wei,Xumin Qu,Yang Xiao,Jingdeng Fan,Gaoli Geng,Lijing Gao,Guomin Xiao
标识
DOI:10.1016/j.cattod.2020.11.028
摘要
A series of catalysts derived from silicotungstic acid (SiW) intercalated with CuZnFe hydrotalcite-like compounds (HTLCs) via ion-exchange method was prepared and characterized by N2-physisorption, XRD, TEM, SEM, H2-TPR, FT-IR, and Py-IR spectra. The intercalation of SiW species into CuZnFe HTLCs was confirmed by these characterization techniques, while the catalytic performance was evaluated for glycerol hydrogenolysis. It was found that introduction of SiW significantly enhanced the selectivity towards 1,3-propanediols (1,3-PDO), owing to the increased Brønsted acid introduction, as demonstrated by Py-IR analysis. The catalyst intercalating 30 wt.% SiW showed the highest selectivity (22.4%) to 1,3-PDO at 68.9% glycerol transformation. The catalytic performance was discussed and correlated with the physicochemical properties of these catalysts. The present contribution provides an economical approach to convert surplus glycerol from biodiesel manufacture to valuable propanediols.
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