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Related Experiment Videos

Modeling mercury porosimetry using statistical mechanics.

F Porcheron1, P A Monson, M Thommes

  • 1Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-9303, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|July 14, 2004
PubMed
Summary

This study models mercury porosimetry using statistical thermodynamics and density functional theory. Findings reveal a direct relationship between mercury intrusion and gas adsorption, clarifying data transformation methods.

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Statistical Mechanics

Background:

  • Mercury porosimetry is a key technique for characterizing porous materials.
  • Understanding the thermodynamic principles governing fluid penetration is crucial for accurate pore structure analysis.
  • Existing methods for converting mercury porosimetry data to gas adsorption isotherms require theoretical clarification.

Purpose of the Study:

  • To model mercury porosimetry using statistical thermodynamics and density functional theory.
  • To investigate the relationship between mercury intrusion/extrusion curves and gas adsorption/desorption isotherms.
  • To analyze the intrusion and extrusion processes in porous materials like Vycor glass.

Main Methods:

  • Application of density functional theory to a lattice gas model.

Related Experiment Videos

  • Computation of intrusion and extrusion curves using the lattice model.
  • Utilizing Monte Carlo simulations to study fluid penetration dynamics.

    • Main Results:

    • Essential features of mercury porosimetry experiments were successfully modeled for Vycor glass.
    • A symmetry in the lattice model established a direct relationship between nonwetting fluid intrusion and wetting fluid adsorption.
    • The study clarifies the theoretical basis for transforming mercury porosimetry data into gas adsorption isotherms.

    Conclusions:

    • The lattice gas model provides a robust framework for understanding mercury porosimetry.
    • The identified symmetry offers a theoretical foundation for interconverting different types of adsorption data.
    • This work enhances the interpretation and application of porosimetry techniques in materials science.