Catalytic effect of halide additives ball milled with magnesium hydride

The influence of various halide additives milled with magnesium hydride (MgH 2) on its decomposition temperature was studied. The optimum amount of halide additive and milling conditions were evaluated. The MgH 2 decomposition temperature and energy of activation reduction were measured by temperatu...

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Bibliographic Details
Published in:International journal of hydrogen energy 2010-02, Vol.35 (4), p.1706-1712
Main Authors: Malka, I.E., Czujko, T., Bystrzycki, J.
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Ball milling
Catalysis
Catalysts
Decomposition
Dehydriding properties
Differential scanning calorimetry
Energy
Exact sciences and technology
Fuels
Halides
Hydrides
Hydrogen
Hydrogen storage
Magnesium
Magnesium hydride
Periodic table
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Summary:The influence of various halide additives milled with magnesium hydride (MgH 2) on its decomposition temperature was studied. The optimum amount of halide additive and milling conditions were evaluated. The MgH 2 decomposition temperature and energy of activation reduction were measured by temperature programmed desorption (TPD) and differential scanning calorimetry (DSC). The difference in catalytic efficiency between chlorides and fluorides of the various metals studied is presented. The effects of oxidation state, valence and position in the periodic table for selected halides on MgH 2 decomposition temperature were also studied. The best catalysts, from the halides studied, for magnesium hydride decomposition were ZrF 4, TaF 5, NbF 5, VCl 3 and TiCl 3.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2009.12.024