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

Published online by Cambridge University Press:  01 February 2011

Kyle Brinkman ,
Joshua R. Gray ,
Bruce Hardy  and
Donald L. Anton
Kyle Brinkman
Affiliation:
[email protected], Savannah River National Laboratory (SRNL), Energy Security, 999-2W, Aiken, SC, 29803, United States, 803-725-6472
Joshua R. Gray
Affiliation:
[email protected], Savannah River National Laboratory (SRNL), Energy Security, Aiken, SC, 29808, United States
Bruce Hardy
Affiliation:
[email protected], Savannah River National Laboratory (SRNL), Engineering Modeling and Simulation, Aiken, SC, 29808, United States
Donald L. Anton
Affiliation:
[email protected], Savannah River National Laboratory (SRNL), Energy Security, Aiken, SC, 29808, United States
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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).

Keywords

calorimetryenergy storagereactivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1098: Symposium HH – The Hydrogen Economy , 2008 , 1098-HH03-14
Copyright
Copyright © Materials Research Society 2008

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