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Title: Hydrogen production from solid reactions between MAlH4 and NH4Cl
Authors: Zhang, H.
Loo, Y.S.
Geerlings, H.
Lin, J.
Chin, W.S. 
Keywords: Alkali aluminum hydride
Chemical hydrogen storage
Hydrogen production
Hydrogen storage
Solid state reaction
Issue Date: Jan-2010
Citation: Zhang, H., Loo, Y.S., Geerlings, H., Lin, J., Chin, W.S. (2010-01). Hydrogen production from solid reactions between MAlH4 and NH4Cl. International Journal of Hydrogen Energy 35 (1) : 176-180. ScholarBank@NUS Repository.
Abstract: Solid reactions between alkali aluminum hydrides (MAlH4, M = Li or Na) and NH4Cl (at mole ratio 1:1) at 170 °C were investigated quantitatively using temperature programmed reaction (TPR), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and x-ray diffraction (XRD). The release of 3 mol of H2 from per mole of MAlH4 was measured, corresponding to 5.6 wt.% H2 capacity for the NaAlH4/NH4Cl system and 6.6 wt.% for LiAlH4/NH4Cl, respectively. By ball milling of the precursor compounds prior to the mixing, the reaction proceeded fast and NH3 production as the by-product could be avoided. The quick solid reactions may be attributed to the low melting temperatures of MAlH4 and the exothermic nature of the reactions. The reaction mechanism was also discussed. © 2009 Professor T. Nejat Veziroglu.
Source Title: International Journal of Hydrogen Energy
ISSN: 03603199
DOI: 10.1016/j.ijhydene.2009.10.070
Appears in Collections:Staff Publications

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