Calculation of density, viscosity, and conductivity for Na(K)BH4 – Na(K)BO2 – Na(K)OH – H2O solutions used in hydrogen power engineering

Concentrated water-alkaline mixtures of sodium and potassium borohydrides and borates are used as fuel and a hydrogen source in hydrogen power engineering, including low-temperature fuel cells. The performance of such mixtures is determined by their physicochemical properties. An algorithm to calculate the density, viscosity, and specific electric conductivity of mixed solutions of the five-component water + salt system (Na,K)BH₄ + (Na,K)BO₂ + (Na,K)OH + H₂O based on the quasiadditivity of these properties is proposed. The concentration-temperature dependences of the density, viscosity, and specific conductivity of aqueous KOH, NaOH, KBO₂, NaBO₂, NaBH₄, and KBH₄solutions of any composition in a temperature range of (0 to 60)°C and the whole concentration range are described mathematically. The technique and algorithm of calculation have been verified by comparison with measured properties.

Authors:

Churikov Aleksei Vladimirovich, Saratov State University, 83, Astrakhanskaya St., Saratov, 410012, churikovav@info.sgu.ru

Ivanishchev Aleksandr Viktorovich, Saratov State University, 83, Astrakhanskaya St., Saratov, 410012, ivanischevav@inbox.ru

Gamayunova Irina Mikhailovna, Saratov State University, 83, Astrakhanskaya St., Saratov, 410012, gamay-irina@yandex.ru

Ushakov Arseni Vladimirovich, Saratov State University, 83, Astrakhanskaya St., Saratov, 410012, arsenivushakov@ya.ru

Churikov Mikhail Alekseevich, Saratov State University, 83, Astrakhanskaya St., Saratov, 410012, churikovma@gmail.com

Key words:

раствор, плотность, вязкость, удельная электропроводность, математическое моделирование, топливный элемент, водородная энергетика

Literature

1. Багоцкий Б. С., Осетрова Н. В., Скундин А. М. // Электрохимия. 2003. Т. 39. С. 919.
2. Wee J.-H. // J. Power Sources. 2006. Vol. 161. P. 1.
3. Li Z. P., Liu, B. H., Arai K., Suda S. // J. Alloy and Compounds. 2005. Vol. 404–406. P. 648.
4. Leon C. P. de, Walsh F. C., Pletcher, D., Browning D. J., Lakeman J. B. // J. Power Sources. 2006. Vol. 155. P. 172.
5. Максимова И. Н., Юшкевич В. Ф. // Журн. физ. химии. 1963. Т. 37. С. 903.
6. Максимова И. Н., Сергеев С. В. // Журн. прикл. химии. 1974. Т. 47. С. 1666.
7. Машовец В. П., Пучков Л. В., Сидорова С. Н., Федоров М. К. // Журн. прикл. химии. 1974. Т. 47. С. 546.
8. Никольский Б. П., Григоров О. Н., Позин М. Е. Справочник химика: В 6 т. Т. III. Л.: Химия. Ленингр. отд-ние, 1971. 1008 с.
9. Сухотин А. М. Справочник по электрохимии. Л.: Химия. Ленингр. отд-ние, 1981. 488 с.
10. Максимова И. Н. // Журн. физ. химии. 1964. Т. 38. С. 277.
11. Юшкевич В. Ю., Максимова И. Н., Буллан В. Г. // Электрохимия. 1967. Т. 3. С. 1491.

Journal issue:

2010. Т. 10, № 3,

DOI:

https://doi.org/10.18500/1608-4039-2010-10-3-109-115

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