Selective Hydrogenation of Diethyl Malonate to 1,3-Propanediol Over Ga-Promoted Cu/SiO2 Catalysts With Enhanced Activity and Stability

被引：0

作者：

Zhang, Jia ^{[1
,2
]}

Shi, Hongxuan ^{[1
,2
]}

Yang, Jian ^{[1
]}

Yao, Xiaolan ^{[1
]}

Liu, Hailong ^{[1
]}

Li, Xuemei ^{[1
]}

Gao, Guang ^{[1
]}

Li, Fuwei ^{[1
,2
]}

Huang, Zhiwei ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Oxo Synth & Select Oxidat, Lanzhou Inst Chem Phys LICP, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2024年 / 19卷 / 11期

关键词：

Malonate; 1,3-Propanediol; Selective hydrogenation; Bimetallic catalyst; Synergistic effect; LOW-TEMPERATURE HYDROGENATION; DIMETHYL OXALATE; ETHYLENE-GLYCOL; CU; METHANOL; ETHANOL; PERFORMANCE;

D O I：

10.1002/asia.202400292

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cu catalysts with different compositions and different Cu and promoter contents were prepared by precipitation-gel method and studied for the selective hydrogenation of syngas or biomass-based diethyl malonate (DEM) to valuable 1,3-propanediol (1,3-PDO). The Ga-promoted 70Cu6Ga/SiO2 catalyst was found to exhibit the highest catalytic performance, achieving 100 % DEM conversion and 76.6 % 1,3-PDO selectivity under reaction conditions of 160 degrees C and 8 MPa H-2. The 70Cu6Ga/SiO2 bimetallic catalyst also presented obviously better stability than that of the monometallic 70Cu/SiO2 catalyst in a continuous flow reactor over 180 h time-on stream. Characterization results showed that the incorporation of Ga increased the interaction between Cu and Ga species, hindered the full reduction of Cu2+ species, and thus increased the proportion of Cu+ and the number of Lewis acidic sites on the catalyst surface. The synergistic effect between Cu-0 and Cu+ enhanced the adsorption and activation of ester carbonyl groups and their subsequent hydrogenation, eventually contributed to the outstanding performances of the CuGa/SiO2 bimetallic catalysts.

引用

页数：10

共 41 条

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