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
Carbon carbon bond formation via aldolization of acetaldehyde on single-crystal and polycrystalline tio2 surfaces
TL;DR: In this article, the aldol condensation of acetaldehyde was shown to exhibit a strong dependence on surface structure, and the selectivity variation likely reflects the influence of surface heterogeneity on the activity for the various competing reactions, especially hydrogenation.
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The reactions of ethanol over M/CeO2 catalysts: Evidence of carbon–carbon bond dissociation at low temperatures over Rh/CeO2
A Yee,S J Morrison,Hicham Idriss +2 more
TL;DR: In this paper, a comparison with previous studies of ethanol adsorption over Pd/CeO2 [J. Catal. 186 (1999) 279] and Pt/CoeO2[J.Catal. 191 (2000) 30] catalysts is presented.
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On-board hydrogen production in a hybrid electric vehicle by bio-ethanol oxidative steam reforming over Ni and noble metal based catalysts
TL;DR: In this paper, the authors present the optimisation of the oxidative steam reforming of ethanol for hydrogen production in order to feed a Solid Polymer Fuel Cell (SPFC) over a Ni-Cu/SiO2 catalyst at on-board conditions.
Journal ArticleDOI
Oxidative steam-reforming of ethanol over Co/SiO2, Co–Rh/SiO2 and Co–Ru/SiO2 catalysts: Catalytic behavior and deactivation/regeneration processes
Evandro Brum Pereira,Narcís Homs,Salvador Martí,José Luis García Fierro,Pilar Ramírez de la Piscina +4 more
TL;DR: In this article, the effect of Ru and Rh addition to SiO2-supported Co catalysts for the oxidative steam reforming of ethanol to produce hydrogen was investigated and shown to have a synergistic effect.
Journal ArticleDOI
Cobalt particle size effects on catalytic performance for ethanol steam reforming – Smaller is better
Andre L.M. da Silva,Johan P. den Breejen,Lisiane V. Mattos,Johannes H. Bitter,Krijn P. de Jong,Fabio B. Noronha +5 more
TL;DR: In this paper, the effect of the cobalt particle size in the ethanol steam reforming reaction at 773 K for hydrogen production was investigated using cobalt on carbon nanofiber catalysts.