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Title: Thermodynamic study on the solubility of NaBH4 and NaBO 2 in NaOH solutions
Authors: Shang, Yinghong
Chen, Rui
Keywords: Sodium borohydride
Hydrogen production
Hydrogen storage
Solubility
Hydrolysis
Issue Date: 2011
Publisher: © SAE International
Citation: SHANG, Y. and CHEN, R., 2011. Thermodynamic study on the solubility of NaBH4 and NaBO 2 in NaOH solutions. SAE Technical Papers, 2011-01-1741, doi:10.4271/2011-01-1741.
Abstract: Extensive research has been performed for on-board hydrogen generation, such as pyrolysis of metal hydrides (e.g. LiH, MgH2), hydrogen storages in adsorption materials (e.g. carbon nanotubes and graphites), compressed hydrogen tanks and the hydrolysis of chemical hydrides. Among these methods, the hydrolysis of NaBH4 has attracted great attention due to the high stability of its alkaline solution and the relatively high energy density, with further advantages such as moderate temperature range (from -5°C to 100°C) requirement, non-flammable, no side reactions or other volatile products, high purity H2 output. The H2 energy density contained by the system is fully depend on the solubility of the complicated solution contains reactant, product and the solution stabiliser. In this work, an approach based on thermodynamic equilibrium was proposed to model the relationship between the solubility of an electrolyte and temperature, and the effect of another component on its solubility. The relationship was then applied to NaBH4 and NaBO2 aqueous solutions, and the effect of introduction of NaOH on their solubility after deriving their solubility from phase diagrams. The data has been shown in good agreement with the proposed model. © Copyright 2011 Society of Automotive Engineers of Japan, Inc. and SAE International.
Description: Copyright © 2015 SAE International. This paper is posted on this site with permission from SAE International, and is for viewing only. Further use or distribution of this paper is not permitted without permission from SAE.
Version: Accepted for publication
DOI: 10.4271/2011-01-1741
URI: https://dspace.lboro.ac.uk/2134/19244
Publisher Link: http://dx.doi.org/10.4271/2011-01-1741
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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