Effects of adding La and Ce to hydrotalcite-type Ni/Mg/Al catalyst precursors on ethanol steam reforming reactions

被引：66
作者：
Lucredio, A. F.
Bellido, J. D. A. [2 ]
Assaf, E. M. [1 ]
机构：
[1] Univ Sao Paulo, Dept Fisicoquim, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
[2] Univ Fed Sao Joao del Rei, Ouro Branco, MG, Brazil
来源：
APPLIED CATALYSIS A-GENERAL | 2010年 / 388卷 / 1-2期
基金：
巴西圣保罗研究基金会;
关键词：
Catalyst; Hydrotalcite; Nickel; Ethanol; Reforming; HYDROGEN-PRODUCTION; PARTIAL OXIDATION; DOUBLE HYDROXIDES; NI CATALYSTS; METHANE; TEMPERATURE; DEPOSITION; CARBON; COKE; AL;
D O I：
10.1016/j.apcata.2010.08.026
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：
Catalyst precursors composed of Ni/Mg/Al oxides with added La and Ce were tested in ethanol steam reforming (ESR) reactions. La and Ce were added by anion-exchange. The oxides were characterized by X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES) analysis. The catalyst precursors consist of a mixture of oxides, with the nickel in the form of NiO strongly interacting with the support Mg/Al. The XPS analysis showed a lanthanum-support interaction, but no interaction of Ce species with the support. The reaction data obtained with the active catalysts showed that the addition of Ce and La resulted in better H-2 production at 550 degrees C. The CeNi catalyst provided the higher ethanol conversion, with lower acetaldehyde production, possibly clue to a favoring of water adsorption on the weakly interacting clusters of CeO2 on the surface. (C) 2010 Elsevier B.V. All rights reserved.
引用
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页码：77 / 85
页数：9
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