Chemical potential of a hard sphere fluid adsorbed in model disordered polydisperse matrices

Aned de Leon, O. Pizio*, S. Sokołowski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We consider a model for adsorption of a simple fluid in disordered polydisperse adsorbents. The fluid consists of hard sphere particles. On the other hand, the adsorbents of this study are modeled as a collection of hard spheres with their diameter obeying a certain distribution function. Our focus is in the evaluation of the chemical potential of the fluid immersed in such a polydisperse material. It permits us to obtain porosity and pore size distribution for the adsorbent, as well as a set of adsorption isotherms. The latter have been calculated theoretically and by grand canonical Monte Carlo simulations. We observe that the width of assumed polydispersity distribution affects all the properties of the system. Nevertheless, the effect of matrix packing is dominant in determining adsorption for this class of models. We are convinced that the matrix structures generated via more sophisticated algorithms would exhibit stronger effects of polydispersity on the entire set of properties of adsorbed simple fluids.

Original languageEnglish
Pages (from-to)306-312
Number of pages7
JournalJournal of Colloid and Interface Science
Issue number1
StatePublished - 1 Jun 2006
Externally publishedYes

Bibliographical note

Funding Information:
Aned de Leon is grateful to the CONACyT of Mexico for the scholarship grant.


  • Adsorption
  • Chemical potential
  • Hard spheres
  • Polydispersity


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