期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 8, 页码 5182-5191出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.09.207
关键词
CO2 reforming of methane; Dry reforming; Biogas; Platinum; Doped CeO2/Al2O3
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- Conselho Nacional de Desenvolvimento Cientifico a Tecnologico Brazil (CNPq) [303667/2018-4]
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro -Brazil (FAPER) [E-26/202.840/2017]
This work investigated the effect of the nature of dopant (Pr, Nb and Zr) on the performance of Pt supported on cerium-based oxides deposited on alumina for dry reforming of methane. in situ XRD and XANES analyses showed that the sample doped with Pr exhibited the highest redutibility of ceria (23%). Furthermore, the cyclohexane dehydrogenation reaction revealed that the addition of Pr improved the resistance to metal sintering during the dry reforming reaction. In the absence of doped-ceria oxide, a strong deactivation took place on Pt/Al2O3 catalyst during reaction, which was due to the absence of support reducibility and the highest Pt sintering. Among the doped-ceria samples, Pt/CePr/Al2O3 exhibited the highest activity and stability. These results were attributed to: (i) the oxygen mobility of the supports containing ceria, mainly for the sample doped with Pr, which favors the carbon removal mechanism; and (ii) the absence of Pt sintering during the reaction. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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