Complete analysis of phase diversity of the simplest adsorption model of a binary gas mixture for all sets of undirected interactions between nearest neighbors

Abstract

In this paper, a complete analysis of the phase diagrams of the model of adsorption of a binary gas mixture on a square lattice in the ground state for all sets of near undirected interactions between particles was performed. Using the principle of minimum of a large thermodynamic potential in a stable phase, the partition of the model parameter space (the energies of lateral interactions) into regions differing by the type of the phase diagram was constructed. Also, for some regions, partial and total coverages as functions of chemical potentials of the gases were calculated through transfer-matrix method and presented. The work is an extension of the work (Fefelov in Phys Chem Chem Phys 20(15): 10359–10368, 2018).

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Acknowledgements

This work was supported by the Russian Science Foundation (Project No. 17-71-20053).

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Correspondence to V. F. Fefelov.

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Fefelov, V.F., Myshlyavtsev, A.V. & Myshlyavtseva, M.D. Complete analysis of phase diversity of the simplest adsorption model of a binary gas mixture for all sets of undirected interactions between nearest neighbors. Adsorption 25, 545–554 (2019). https://doi.org/10.1007/s10450-019-00043-3

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Keywords

  • Adsorption
  • Binary gas mixtures
  • Lattice gas model
  • Phase transitions
  • Ground state
  • Phase behavior