Influence of intrinsic hydrogenation/dehydrogenation kinetics on the dynamic behaviour of metal hydrides: A semi-empirical model and its verification

Førde, T.; Mæhlen, Jan Petter; Yartys, V.A.; Lototsky, M.V.; Uchida, Hirohisa

doi:10.1016/j.ijhydene.2006.07.015

Cited by 59 publications

(36 citation statements)

References 21 publications

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“…In the case of Ti 0.8 V 0.2 , the activation energy was rather low, 17 kJ/mol, being comparable with the activation energy of hydrogenation for LaNi 5 , 16e37 kJ/mol [18,19]. For Ti 0.9 V 0.1 , the activation energy was found to be slightly higher, 35 kJ/mol.…”

Section: Hydrogenation Kineticssupporting

confidence: 52%

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

Suwarno

Solberg

Krogh

et al. 2016

International Journal of Hydrogen Energy

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Section: Hydrogenation Kineticssupporting

confidence: 52%

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

Suwarno

Solberg

Krogh

et al. 2016

International Journal of Hydrogen Energy

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“…No vacuum heating to activate the samples was applied. The experimental data was processed by application of a formal kinetic analysis using the Avrami-Erofeev equation [28]:…”

Section: Methodsmentioning

confidence: 99%

Nanostructured surface coatings for the improvement of AB₅-type hydrogen storage intermetallics

Williams

Lototsky

Linkov

et al. 2009

Int. J. Energy Res.

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SUMMARYHydrogen absorption behaviour of intermetallic absorbers strongly depends upon the contribution of the surface layers into the overall rate of the hydrogenation process. Activation process, which is normally required to initiate and facilitate the initial hydrogen uptake, may be waved by modifying the surface behaviour, thus offering obvious practical benefits. In the present work a surface nanoengineering approach was developed to enhance the hydrogenation ability of rare earth-containing AB 5 -type hydride-forming intermetallics. The modification involves three successive steps; (a) fluorination to form a surface-covering REF 3 layer with a high specific surface area; (b) surface functionalization by g-APTES; (c) deposition of Pd nanoparticles into the surface nanocavities of the fluoride. The surface functionalization step was applied to immobilize Pd nuclei inside the nanocavities of the REF 3 layer. The deposited Pd nanoparticles exhibited a high degree of coalescence, and were further transformed into a continuous surface layer. Pd/fluoride modified materials exhibited exceptional Pd coating densities and imposed a large facilitation in the kinetics of hydrogenation compared with the conventional nonmodified intermetallics. The approach has a potential in the directed design of new classes of highly efficient and robust composite hydrogen sorption materials for hydrogen storage, separation and purification. Large improvements in the kinetics of hydrogenation of the Pd/fluoride modified intermetallics also manifested by extraordinary surface poisoning tolerance towards oxygen and water vapour, as compared with that of the nonmodified, or just fluorinated/Pd modified intermetallic alloys. The developed classes of highly efficient and robust composite hydrogen sorption materials have the potential for application as sorption media for the high efficiency hydrogen storage, separation and purification systems and may facilitate progress towards the implementation of the key elements of future hydrogen economy.

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“…A few expressions are available for f 3 according to (Ron, 1999), and a so-called normalized pressure dependence expression was recommended. However, some authors argued that f 3 should be related to the reaction mechanism (Forde et al, 2007). In this investigation, the kinetic equations for LaNi 5 are those recommended by (Jemni and Ben Nasrallah, 1995a;Jemni and Ben Nasrallah, 1995b),…”

Section: Reactor Geometry and Operationmentioning

confidence: 77%

Simulation Studies on the Coupling Process of Heat/Mass Transfer in a Metal Hydride Reactor

Yang¹,

Zhang²

2011

Mass Transfer in Multiphase Systems and Its Applications

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Influence of intrinsic hydrogenation/dehydrogenation kinetics on the dynamic behaviour of metal hydrides: A semi-empirical model and its verification

Cited by 59 publications

References 21 publications

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

Nanostructured surface coatings for the improvement of AB₅-type hydrogen storage intermetallics

Simulation Studies on the Coupling Process of Heat/Mass Transfer in a Metal Hydride Reactor

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Influence of intrinsic hydrogenation/dehydrogenation kinetics on the dynamic behaviour of metal hydrides: A semi-empirical model and its verification

Cited by 59 publications

References 21 publications

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

High temperature hydrogenation of Ti–V alloys: The effect of cycling and carbon monoxide on the bulk and surface properties

Nanostructured surface coatings for the improvement of AB5-type hydrogen storage intermetallics

Simulation Studies on the Coupling Process of Heat/Mass Transfer in a Metal Hydride Reactor

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Product

Resources

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Nanostructured surface coatings for the improvement of AB₅-type hydrogen storage intermetallics