Physicochemical Transport Properties of Aqueous Sodium Metaborate Solutions for Sodium Borohydride Hydrogen Generation and Storage and Fuel Cell Applications

Abstract:

The conductivity and viscosity of aqueous solutions of NaBO2 were measured as a function of concentration at 25oC. Conductivity data was analyzed with various Kohlrausch correlations and the limiting molar conductivity of the BO2 - ion at infinite dilution was estimated to be of 30.59 S.cm2/mol. From this value, the mobility, diffusion coefficients and transference number for the BO2 - ion were calculated as 3.17x10-4 cm2/s.V, 8.14x10-6 cm2/s, and 0.379 respectively. Ion-solvent and ion-ion interactions were studied with Jones-Dole type correlations, which were employed to analyze the viscosity data. A value of -0.4660 1/M was estimated for the BO2 - B- coefficient.

• Periodical: Advanced Materials Research (Volumes 15-17)
• Pages: 267-274
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.15-17.267
• Online since: February 2006
• Authors: Caroline R. Cloutier, Akram Alfantazi, Elod Gyenge
• Keywords: Conductivity, Hydrogen Storage, Sodium Metaborate, Viscosity

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