Properties of Sr modified Cu-based catalysts for hydrogenation of fructose to mannitol

被引：0
|
作者：
Hu F. [1 ]
Yao J. [1 ]
Li X. [1 ]
Li S. [1 ]
Yan X. [1 ]
机构：
[1] State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang
来源：
Huagong Xuebao | 2019年 / 4卷 / 1420-1428期
关键词：
Activity; Catalyst; Fructose; Hydrogenation; Mannitol; Selectivity; Sr;
D O I：
10.11949/j.issn.0438-1157.20181006
中图分类号：
学科分类号：
摘要：
A supported Cu catalyst was prepared by using a co-precipitation method. The Cu catalyst was modified by adding alkaline earth metal strontium to improve the activity and selectivity for the hydrogenation of fructose to prepare mannitol. Systematic characterizations, with ICP-MS, XRD, TEM, H2-TPR, XPS and CO2-TPD, showed that the increase catalytic activity of the catalyst is due to the fact that the formation of SrCO3 formed on the surface of the support can increase the specific surface area of the catalyst and improve the dispersion of the copper species. In addition, the medium-strong basic sites formed on the surface of SrCO3 can activate the carbonyl group into β-furanose which can be easily hydrogenated into mannitol. Fructose conversion of around 100% and mannitol selectivity of 79% were achieved in the conditions of 1.1 mol•L-1 fructose concentration, catalyst dosage of 6% of reactant quality, reaction temperature of 373 K, hydrogen pressure of 4.0 MPa and Cu/Sr atomic ratio of 7:1. The excellent stability of the Cu-Sr/SiO2 catalyst remained basically unchanged after recycling for 20 times. © All Right Reserved.
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页码：1420 / 1428
页数：8
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