Metal Hydride Technologies for Separation of Hydrogen Isotopes

Abstract:

The paper considers the issue of theoretical prediction of characteristics at which separation of hydrogen isotopes occurs in the “gas-metal” system. Mathematical modeling of sorption is based on the use of the lattice gas model often used for metal hydrides. In contrast to the Leicher ideal solution model, it is taken into account that the dissolution of hydrogen in the metal increases the volume of the crystal lattice. This leads to additional contributions to potential energy. The model also takes into account the interaction between the atoms of the incorporated (absorbed) hydrogen isotopes. These phenomena are described by the methods of thermodynamic perturbation theory. The different composition of the gas (protium and deuterium) in contact with the metal leads to the fact that sorption, accompanied by the formation of hydride, proceeds for the same temperature at different equilibrium pressures. This phenomenon characterizes the isotope effect. The temperature dependences of the pressure on the "plateau" for palladium hydride and deuteride are obtained. The differences in these pressures can be used for the practical use of metal hydrides in the separation of hydrogen isotopes.

• Periodical: Materials Science Forum (Volume 1038)
• Pages: 203-209
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1038.203
• Online since: July 2021
• Authors: Kseniya Umerenkova, Vitalii Borisenko, Svitlana Svetlichna, Marianna Goroneskul*
• Keywords: Hydrogen, Isotope Separation, Isotopes, Mathematical Modeling, Metal Hydrides, Nonideal Lattice Gas

References

[1] B.P. Tarasov, V.V. Burnasheva, M.V. Lototsky, V.A. Yartys, Hydrogen storage methods and the possibility of using metal hydrides, Alternative Energy and Ecology. 12(32) (2005) 14-37.

[2] V.A. Yartys, M.V. Lototsky, An Overview of Hydrogen Storage Methods, Hydrogen Materials Science and Chemistry of Carbon Nanomaterials, in: T.N. Veziroglu, S.Yu.Zaginaichenko, D.V. Schur, B.Baranovsky, A.P. Shpak, V.V. Skorochod (Eds.). Kluwer Academic Publishers, (2004) 75-104.

DOI: 10.1007/1-4020-2669-2_7

[3] Y. Abramov, V. Borisenko, V. Krivtsova, Design of control algorithm over technical condition of hydrogen generators based on hydro-reactive compositions. Eastern-European Journal of Enterprise Technologies. 2017. Vol. 5, No. 8–89. P. 16–21.

DOI: 10.15587/1729-4061.2017.112200

[4] Hydrogen in metals, in: G. Alefeld, I. Felkl (Eds.). M. Mir,. Vol. 1 (1981) 476, Vol. 2 (1981) 432.

[5] V.S Marinin, Thermal physics of alternative energy sources. Fort, Kharkiv. (1999) 212.

[6] Thermodynamic properties of individual substances, in: V.P. Glushko (Ed.). М. Science,. Vol. 1 (1978) 342.

[7] V.S. Marinin, K.R. Umerenkova, Yu.F.Shmalko, M.P. Lobko, M.V. Lototsky, Interacting lattice gas model for hydrogen subsystem of metal hydrides, Functional materials. Vol.9. Issue 3 (2002) 395–401.

[8] V. S. Marinin, Yu.F.Shmalko, K.R. Umerenkova, M.V. Lototsky, M.P. Lobko, Critical separation point of disordered metal hydride phases in the model of interacting lattice gas, Functional materials. Vol.9 Issue 4 (2002) 587–594.

[9] E. Fromm, E., Gebhardt, Gases and carbon in metals, M. Metallurgy, (1980) 712.