Journal ArticleDOI
Hydrogen production from ethanol reforming: Catalysts and reaction mechanism
TLDR
A detailed analysis based on the spectroscopic technique revealed that reaction pathways proceeded along a mono-functional or bi-functional mechanism according to the types of active metal and support as mentioned in this paper.Abstract:
Hydrogen production from ethanol is regarded as a promising way for energy sustainable development, which is undergoing an explosive growth over the last decade. Besides operating conditions, hydrogen yield greatly dependent on the nature of metal and the support selected. To date, Rh based catalysts proved to be the most active systems due to the fact that Rh possessed the greatest capacity toward C–C bond cleavage. Support also played a critical role in terms of hydrogen selectivity and stability. MgO, CeO2 and La2O3 etc were evidenced as suitable supports because of their basic characteristic and/or redox capacity. A detailed analysis based on the spectroscopic technique revealed that reaction pathways proceeded along a mono-functional or bi-functional mechanism according to the types of active metal and support. Ethanol dehydrogenation and/or dehydration reaction mainly occurred on the support, and the diffusion/transformation of the intermediates took place at the metal–support interface. Meanwhile, active metal accelerated the decomposition reaction. The observed catalyst deactivation was normally assigned to the coke formation, active metal sintering and/or oxidation as well as the impurity in crude bio-ethanol. Hence, the scope of this review is to address the present progress in ethanol reforming for hydrogen production including catalyst development and the analysis of the reaction mechanism and kinetics in order to shed light on the design of high efficient catalyst systems and the fundamental understanding of ethanol conversion at the molecular level.read more
Citations
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Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review
TL;DR: In this article, a review deals with the currently existing alternatives at the catalyst and reactor level to cope with catalyst deactivation and increase process stability, and then delves with the fundamental phenomena occurring during this catalysts deactivation.
Journal ArticleDOI
Catalytic Reforming of Oxygenates: State of the Art and Future Prospects.
Di Li,Xinyu Li,Jinlong Gong +2 more
TL;DR: In insights into the intrinsic mechanism involved in catalytic reforming are presented and guidance is provided to the development of novel catalysts and processes for the efficient utilization of oxygenates for energy and environmental purposes.
Journal ArticleDOI
Strategies for carbon and sulfur tolerant solid oxide fuel cell materials, incorporating lessons from heterogeneous catalysis
Paul Boldrin,Enrique Ruiz-Trejo,Joshua M. Mermelstein,José Miguel Bermudez Menendez,Tomas Ramirez Reina,Nigel P. Brandon +5 more
TL;DR: The theoretical basis behind carbon and sulfur poisoning is studied, before examining the strategies toward carbon and sulphur tolerance used so far in the SOFC literature, and the more extensive relevant heterogeneous catalysis literature is studied for strategies and materials which could be incorporated intocarbon and sulfur tolerant fuel cells.
Journal ArticleDOI
Recent development in the synthesis, modification and application of Mg(OH)(2) and MgO: A review
TL;DR: Magnesium hydroxide and magnesium oxide are compounds with favorable and unique properties, leading to a broad range of opportunities for their use in science, and above all in practical applications.
Journal ArticleDOI
Renewable hydrogen economy in Asia – Opportunities and challenges: An overview
Manoj Pudukudy,Manoj Pudukudy,Zahira Yaakob,Masita Mohammad,Binitha N. Narayanan,Kamaruzzaman Sopian +5 more
TL;DR: In this article, the authors have discussed the necessity of employing hydrogen as an alternative fuel, its production paths, storage issues, transportation and the available sources in Asia, and highlighted the challenges in the execution of hydrogen as a economical fuel in Asia.
References
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Journal ArticleDOI
Steam and CO2 reforming of ethanol over Rh/CeO2 catalyst
Adriana M. da Silva,Kátia R. de Souza,Gary Jacobs,Uschi M. Graham,Burtron H. Davis,Lisiane V. Mattos,Fabio B. Noronha +6 more
TL;DR: In this article, the performance of ceria supported Rh catalysts prepared with high and low surface areas for steam reforming and dry reforming of ethanol was investigated, according to results of diffuse reflectance infrared Fourier transform spectroscopy of both reactions.
Journal ArticleDOI
Kinetic modeling of hydrogen production by the catalytic reforming of crude ethanol over a co-precipitated Ni-Al2O3 catalyst in a packed bed tubular reactor
TL;DR: In this paper, the authors performed a kinetic modeling of the production of hydrogen by the catalytic reforming of crude ethanol over a 15%-Ni/Al 2 O 3 catalyst prepared by the co-precipitation technique.
Journal ArticleDOI
Steam-reforming of ethanol for hydrogen production
Ahmed Bshish,Zahira Yaakob,Binitha N. Narayanan,Binitha N. Narayanan,Resmi M. Ramakrishnan,Ali Ebshish +5 more
TL;DR: In this paper, a review of the catalysts used for hydrogen production from ethanol is presented, focusing on various catalytic systems used for this purpose, including promoted-Ni and basic oxide supports.
Journal ArticleDOI
Characterization of supported cobalt and cobalt-rhodium catalysts : III. Temperature-Programmed Reduction (TPR), Oxidation (TPO), and EXAFS of Co---Rh/SiO2
TL;DR: In this article, it was shown that the reduced catalyst contains bimetallic Co-Rh particles, the interiors of which are enriched in rhodium, while the outer layers contain more cobalt.
Journal ArticleDOI
High Activity of Ce1−xNixO2−y for H2 Production through Ethanol Steam Reforming: Tuning Catalytic Performance through Metal–Oxide Interactions
Gong Zhou,Laura Barrio,Stefano Agnoli,Sanjaya D. Senanayake,Jaime Evans,Anna Kubacka,Michael A. Estrella,Jonathan C. Hanson,Arturo Martínez-Arias,Marcos Fernández-García,José A. Rodriguez +10 more
TL;DR: The importance of the oxide: Ce{ sub 0.8}Ni{sub 0.2}O{sub 2-y} is an excellent catalyst for ethanol steam reforming and facilitates cleavage of the OH bonds in ethanol and water.