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Metals 2012, 2(3), 219-228; doi:10.3390/met2030219

Dehydrogenation Kinetics and Modeling Studies of MgH2 Enhanced by Transition Metal Oxide Catalysts Using Constant Pressure Thermodynamic Driving Forces

Department of Chemistry, Delaware State University, Dover, DE 19901, USA
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Received: 27 May 2012 / Revised: 13 June 2012 / Accepted: 14 June 2012 / Published: 25 June 2012
(This article belongs to the Special Issue Magnesium Technology)
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Abstract

The influence of transition metal oxide catalysts (ZrO2, CeO2, Fe3O4 and Nb2O5) on the hydrogen desorption kinetics of MgH2 was investigated using constant pressure thermodynamic driving forces in which the ratio of the equilibrium plateau pressure (pm) to the opposing plateau (pop) was the same in all the reactions studied. The results showed Nb2O5 to be vastly superior to other catalysts for improving the thermodynamics and kinetics of MgH2. The modeling studies showed reaction at the phase boundary to be likely process controlling the reaction rates of all the systems studied.
Keywords: hydrogen storage; magnesium hydride; kinetics; modeling hydrogen storage; magnesium hydride; kinetics; modeling
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Sabitu, S.T.; Goudy, A.J. Dehydrogenation Kinetics and Modeling Studies of MgH2 Enhanced by Transition Metal Oxide Catalysts Using Constant Pressure Thermodynamic Driving Forces. Metals 2012, 2, 219-228.

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