Journal ArticleDOI
Catalytic dry reforming of methane over high surface area ceria
TLDR
In this article, high surface area ceria (CeO 2) was synthesized by a surfactant-assisted approach, which has useful dry reforming activity for H 2 and CO production under solid oxide fuel cells (SOFCs) conditions.Abstract:
High surface area ceria (CeO 2 (HSA)), synthesized by a surfactant-assisted approach, was found to have useful dry reforming activity for H 2 and CO production under solid oxide fuel cells (SOFCs) conditions. The catalyst provides significantly higher reforming reactivity and excellent resistance toward carbon deposition compared to Ni/Al 2 O 3 and conventional low surface area ceria (CeO 2 (LSA)) under dry reforming conditions. These enhancements are due to the high redox property of CeO 2 (HSA). During the dry reforming process, the redox reactions between the gaseous components in the system and the lattice oxygen (O x ) take place on ceria surface. Among these reactions, the rapid redox reactions of carbon compounds such as CH 4 , and CO with lattice oxygen (CH 4 + O x → CO + H 2 + O x −1 and CO + O x = CO 2 + O x −1 ) can prevent the formation of carbon species from the methane decomposition and Boudard reactions even at low inlet carbon dioxide concentration. In particular, the dry reforming rate over CeO 2 (HSA) is proportional to the methane partial pressure and the operating temperature. Carbon dioxide presents weak positive impact on the methane conversion, whereas both carbon monoxide and hydrogen inhibit the reforming rate. The activation energies and reforming rates under the same methane concentration for CeO 2 toward the dry reforming are almost equal to the steam reforming as previously reported [1–4] . This result suggests the similar reaction mechanisms for both the steam reforming and the dry reforming over CeO 2 ; i.e., the dry reforming rate is governed by the slow reaction of adsorbed methane, or surface hydrocarbon species, with oxygen in CeO 2 , and a rapid gas–solid reaction between CO 2 and CeO 2 to replenish the oxygen.read more
Citations
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Journal ArticleDOI
Potential oscillation of methane oxidation reaction on (La0.75Sr0.25)(Cr0.5Mn0.5)O3 electrodes of solid oxide fuel cells
TL;DR: In this paper, the open circuit potential (OCP) and potential is observed for the methane oxidation reaction on (La 0.75Sr0.25)(Cr 0.5Mn0.5)O3 composite electrodes of solid oxide fuel cells (SOFCs) in weakly humidified methane.
Journal ArticleDOI
Preparation of mesoporous nanocrystalline 10% Ni/Ce1−xMnx O2 catalysts for dry reforming reaction
TL;DR: In this paper, the results indicated that the incorporation of Mn to the cerium oxide improved the BET area and significantly raised the mean pore size, however, the catalytic stability improved upon the addition of Mn.
Journal ArticleDOI
Effect of Preparation Technique on the Performance of Ni and Ce Incorporated Modified Alumina Catalysts in CO 2 Reforming of Methane
TL;DR: In this paper, the performance of modified sol-gel alumina (MSGA) based catalysts, synthesized in an inert atmosphere and activated by Ni and Ce were investigated in CO2 reforming of methane.
Journal ArticleDOI
Production of liquid fuel from palmitic acid over nanocrystalline CeO2-based catalysts with minimal use of H2
Tosapol Maluangnont,Chalinee Dararat,Teerapong Kulrat,Surachet Soontontaweesub,Thitima Anothaiwalaikul,Piyawadee Bunprechawong,Rawipot Chanda,Jarin Kanchanawarin,Pinit Kidkhunthod,Tawan Sooknoi +9 more
TL;DR: In this article, the deoxygenation of palmitic acid into diesel-range hydrocarbons can be promoted over nanocrystalline ceria-based catalysts under atmospheric N 2 or 10% H 2 /N 2 in a fixed-bed flow reactor at 400°C.
Journal ArticleDOI
Kinetic and process study of ethanol steam reforming over Ni/Mg(Al)O catalysts: The initial steps
TL;DR: In this article, a 2 wt.% Ni/Mg(Al)O catalyst was subjected to kinetic studies for the ethanol steam reforming (ESR) reaction at 500°C, with space-time ranging from 0.03 to 0.93 (atm).
References
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Journal ArticleDOI
The multiple roles for catalysis in the production of H2
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