Catalytic conversion of syngas to mixed alcohols over CuFe-based catalysts derived from layered double hydroxides

被引:118
|
作者
Gao, Wa [1 ]
Zhao, Yufei [1 ]
Liu, Junmin [1 ]
Huang, Qianwen [1 ]
He, Shan [1 ]
Li, Changming [1 ]
Zhao, Jingwen [1 ]
Wei, Min [1 ]
机构
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
FISCHER-TROPSCH SYNTHESIS; HYDROGEN-PRODUCTION; METHANOL SYNTHESIS; DIMETHYL OXALATE; FE CATALYSTS; NANOPARTICLES; PERFORMANCE; REDUCTION; ETHANOL; LA2O3;
D O I
10.1039/c3cy00025g
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
A uniform and highly dispersed CuFe-based catalyst was obtained via a calcination-reduction process of a CuFeMg-layered double hydroxide (LDH) precursor, which exhibits good activity and selectivity towards catalytic conversion of syngas to mixed alcohols. X-ray diffraction (XRD) and scanning electron microscopy (SEM) reveal that the CuFeMg-LDH precursor possesses high crystallinity with a particle size of 40-60 nm. High resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy (STEM) demonstrate a high dispersion of copper and iron species on the catalyst surface. The CuFe-based catalyst derived from CuFeMg-LDHs shows high CO conversion (56.89%) and the total alcohol yield (0.28 g mL(cat)(-1) h(-1)), as a result of the high dispersion of active species as well as the synergistic effect between the copper and the iron species revealed by X-ray photoelectron spectra (XPS) and H-2 temperature-programmed reduction (H-2-TPR) techniques. Therefore, this work provides a facile and effective method for the preparation of CuFe-based catalysts with high catalytic activity, which can be potentially used in syngas conversion to mixed alcohols.
引用
收藏
页码:1324 / 1332
页数:9
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