Citation: DANG Cheng-Xiong, YANG Hao-Bo, YU Hao, WANG Hong-Juan, PENG Feng. Ce_xNi_0.5La_0.5-xO Catalysts for Hydrogen Production by Oxidative Steam Reforming of Glycerol: Influence of the Ce-to-La Ratio[J]. Acta Physico-Chimica Sinica, ;2016, 32(6): 1527-1533. doi: 10.3866/PKU.WHXB201603161 shu

Ce_xNi_0.5La_0.5-xO Catalysts for Hydrogen Production by Oxidative Steam Reforming of Glycerol: Influence of the Ce-to-La Ratio

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China

Received Date: 4 January 2016
Revised Date: 15 March 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (20176094), Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0190), and Pearl River Nova Program of Guangzhou City, China (2011J2200062).

Ce_xNi_0.5La_0.5-xO (CeNiLaO) catalysts were synthesized using a Ce-La composite oxide as the carrier via co-precipitation. They were applied in the oxidative steamreforming of glycerol (OSRG) in a fixed-bed reactor. The catalysts were characterized by X-ray diffraction (XRD), H₂-temperature-programmed reduction (H₂-TPR), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Xray photoelectron spectroscopy (XPS). The results showed that La₂O₃ improved the dispersion of metallic Ni and suppressed the sintering of metallic Ni particles; the lattice oxygen of CeO₂ inhibited and eliminated carbon deposition on the surface of the catalysts; and the substitution of some La3+ for Ce⁴⁺ ions induced a distortion of the lattice. The synergy of La₂O₃ and CeO₂ lessened the deactivation caused by the sintering and coke deposition and improved the catalytic performance. Among the catalysts with different molar ratios of Ce to La, Ce_0.4Ni_0.5La_0.1O had the best catalytic activity. The conversion of glycerol remained above 95% after a 210 h stability test, while a gaseous reformate of about 50% hydrogen could be steadily produced.
- CeO₂,
- La₂O₃,
- Ni,
- Stability,
- Glycerol,
- Hydrogen production,
- Steam reforming
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CexNi0.5La0.5-xO Catalysts for Hydrogen Production by Oxidative Steam Reforming of Glycerol: Influence of the Ce-to-La Ratio

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通讯作者: 陈斌, bchen63@163.com

Ce_xNi_0.5La_0.5-xO Catalysts for Hydrogen Production by Oxidative Steam Reforming of Glycerol: Influence of the Ce-to-La Ratio