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The Hydrolysis and Oxidation Behavior of Lithium Borohydride and Magnesium Hydride Determined by Calorimetry

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Abstract

Lithium borohydride, magnesium hydride and the 2:1 “destabilized” ball milled mixtures (2LiBH4:MgHM2) underwent liquid phase hydrolysis, gas phase hydrolysis and air oxidation reactions monitored by isothermal calorimetry. The experimentally determined heats of reaction and resulting products were compared with those theoretically predicted using thermodynamic databases. Results showed a discrepancy between the predicted and observed hydrolysis and oxidation products due to both kinetic limitations and to the significant amorphous character of observed reaction products. Gas phase and liquid phase hydrolysis were the dominant reactions in 2LiBH4:MgH2 with approximately the same total energy release and reaction products; liquid phase hydrolysis displayed the maximum heat flow for likely environmental exposure with a peak energy release of 6 (mW/mg).

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Authors and Affiliations

  1. Energy Security, Savannah River National Laboratory (SRNL), 29808, Aiken, SC, USA

    Kyle S. Brinkman, Joshua R. Gray & Donald L. Anton

  2. Materials Science and Technology, Savannah River National Lab (SRNL), 29808, Aiken, SC, USA

    Kyle S. Brinkman

  3. Engineering Modeling and Simulation, Savannah River National Laboratory (SRNL), 29808, Aiken, SC, USA

    Bruce Hardy

Authors
  1. Kyle S. Brinkman
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  2. Joshua R. Gray
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  3. Bruce Hardy
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  4. Donald L. Anton
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Brinkman, K.S., Gray, J.R., Hardy, B. et al. The Hydrolysis and Oxidation Behavior of Lithium Borohydride and Magnesium Hydride Determined by Calorimetry. MRS Online Proceedings Library 1098, 10980314 (2008). https://doi.org/10.1557/PROC-1098-HH03-14

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  • DOI: https://doi.org/10.1557/PROC-1098-HH03-14

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