Highly-Dispersed Copper-Based Catalysts from Cu-Zn-Al Layered Double Hydroxide Precursor for Gas-Phase Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

被引：45

作者：

Zhang, Shaoyan ^{[1
]}

Liu, Quanyao ^{[1
]}

Fan, Guoli ^{[1
]}

Li, Feng ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

CATALYSIS LETTERS | 2012年 / 142卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Metallic copper; Layered double hydroxide precursor; High dispersion; Dimethyl oxalate; Hydrogenation; STRUCTURAL EVOLUTION; CU/SIO2; CATALYST; SIZE; HYDROGENOLYSIS; ISOMERIZATION; EXCHANGE; METHANE;

D O I：

10.1007/s10562-012-0871-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The highly-dispersed copper-based catalysts for the gas-phase hydrogenation of dimethyl oxalate to ethylene glycol (EG) were prepared from a Cu-Zn-Al layered double hydroxide (LDH) precursor. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), N-2 adsorption-desorption, H-2 temperature programmed reduction (H-2-TPR) and H-2-N2O titration indicated that the composition, texture, and structure of resulting copper-based catalysts were profoundly affected by the calcination temperature of LDH precursor. Moreover, the as-synthesized catalyst calcined at 600 A degrees C was found to exhibit a superior catalytic hydrogenation performance with an EG yield of 94.7 % to the other catalysts calcined at 500 and 700 A degrees C, which should be mainly attributed to the presence of the highly-dispersed active metallic copper species over metal oxide matrix.

引用

页码：1121 / 1127

页数：7

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