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Nickel-based catalyst derived from NiO-Ce0.75Zr0.25O2 nanocrystalline composite: Effect of the synthetic route on the partial oxidation of methane
被引:9
作者:
da Silveira, V. R.
[1
]
Melo, D. M. A.
[1
]
Barros, B. S.
[2
]
Ruiz, J. A. C.
[3
]
Alcazar Rojas, Leopoldo O.
[3
]
机构:
[1] Univ Fed Rio Grande do Norte, Inst Chem, POB 1662, BR-59078970 Natal, RN, Brazil
[2] Univ Fed Pernambuco, Dept Mech Engn, BR-50070901 Recife, PE, Brazil
[3] Ctr Gas Technol & Renewable Energy CTGAS ER, Av Capitao Mor Gouveia 1480, BR-5906340 Natal, RN, Brazil
关键词:
Syngas;
Partial oxidation of methane;
Pechini;
Self-combustion;
Microwave;
CARBON-DIOXIDE;
NI;
PERFORMANCE;
CONVERSION;
GAS;
D O I:
10.1016/j.ceramint.2016.07.119
中图分类号:
TQ174 [陶瓷工业];
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
In this work, we investigated the effects of two different synthetic routes, Pechini and microwave-induced combustion method, on the properties of nickel-based catalysts derived from NiO-Ce0.75Zr0.25O2 nanocomposite. Powder samples were characterized by specific surface area (SSA) via BET method, X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature-programmed reduction (TPR). It was found that the synthesis method has a significant influence on the powder morphology, which may affect the catalytic activity. The nickel-based catalysts were tested for the partial oxidation of methane showing high CH4 conversion, 80% and 81% after the first hour on stream, for the samples prepared by Pechini and combustion method, respectively. These samples also exhibited catalytic stability, keeping CH4 conversion levels about 77% and 80% after ten hours on stream, respectively. We suggest that such good performance is related to the good dispersion and particle size of the metallic nickel over Zr-CeO2 support. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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页码:16084 / 16089
页数:6
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