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Adsorption Of A Simple Fluid In A Quenched Two-Component Hard Sphere Matrix Replica Ornstein–Zernike Equations

Author

Listed:
  • MIGUEL MAYORGA

    (Facultad de Ciencias de la UAEMéx., Av. Inst. Literario 100, Toluca 50000, México)

  • OREST PIZIO

    (Instituto de Química de la UNAM, Coyoacán 04510, México D.F., Mexico)

  • STEFAN SOKOLOWSKI

    (Department of Modelling of Physico-Chemical Processes, Marie Curie-Sklodowska University, Lublin 200-31, Poland)

Abstract

Using the replica Ornstein–Zernike (ROZ) integral equations, we investigate the adsorption of a simple fluid in a hard sphere quenched matrix made of two species. Our main focus is in the dependencies of the density of fluid species on the chemical potential in matrices with different microporosity and for several compositions. The simple fluid is considered by using a hard sphere model. The fluid-matrix interactions are assumed either solely repulsive or attractive of the Yukawa type. The ROZ equations are supplemented by both the Percus–Yevick (PY) and the hypernetted chain (HNC) closures. The PY closure is used to study the model with solely repulsive forces (reference system) and then the contribution of attractive forces into adsorption is included in the mean field approximation. On the other hand, the HNC approximation is used to get insight into the structure of adsorbed fluid and the fluid-matrix correlations in the presence of attractive forces.

Suggested Citation

  • Miguel Mayorga & Orest Pizio & Stefan Sokolowski, 1999. "Adsorption Of A Simple Fluid In A Quenched Two-Component Hard Sphere Matrix Replica Ornstein–Zernike Equations," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 10(07), pages 1271-1279.
    • Handle: RePEc:wsi:ijmpcx:v:10:y:1999:i:07:n:s0129183199001030
    DOI: 10.1142/S0129183199001030
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