Adsorption and Diffusion in Nanoporous Materials

Adsorption and Diffusion in Nanoporous Materials

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Features

  • Dedicates an entire chapter to statistical physics, particularly useful for scientists with little or no training in this area
  • Provides a detailed treatment of density functional theory in the study of fluid adsorption in enclosed porous systems
  • Focuses on the analysis of microporous crystalline, mesoporous ordered, and micro- and mesoporous amorphous materials
  • Presents the necessary equations for calculating adsorption in porous systems rates, pore volume, pore size distribution, and more
  • Includes two chapters on the synthesis and modification of silica, active carbons, zeolites, and related materials, and mesoporous molecular sieves
  • Summary

    As nanomaterials get smaller, their properties increasingly diverge from their bulk material counterparts. Written from a materials science perspective, Adsorption and Diffusion in Nanoporous Materials describes the methodology for using single-component gas adsorption and diffusion measurements to characterize nanoporous solids.

    Concise, yet comprehensive, the book covers both equilibrium adsorption and adsorption kinetics in dynamic systems in a single source. It presents the theoretical and mathematical tools for analyzing microporosity, kinetics, thermodynamics, and transport processes of the adsorbent surface. Then it examines how these measurements elucidate structural and morphological characteristics of the materials. Detailed descriptions of the phenomena include diagrams, essential equations, and fully derived, concrete examples based on the author's own research experiences and insight. The book contains chapters on statistical physics, dynamic adsorption in plug flow bed reactors, and the synthesis and modification of important nanoporous materials. The final chapter covers the principles and applications of adsorption for multicomponent systems in the liquid phase.

    Connecting recent advances in adsorption characterization with developments in the transport and diffusion of nanoporous materials, this book is ideal for scientists involved in the research, development, and applications of new nanoporous materials.

    Table of Contents

    STATISTICAL MECHANICS
    Definition of Microstate and Macrostate
    Definition of Ensemble
    The Canonical Ensemble
    Evaluation of α and β for the Canonical Ensemble
    The Grand Canonical Ensemble
    Evaluation of α, β, and γ for the Grand Canonical Ensemble
    Canonical Partition Function for a System of Noninteracting Particles
    Factorization of the Molecular Partition Function
    Density Functional Theory (DFT)
    Thermodynamics of Irreversible Processes
    Statistical Mechanics of Irreversible Processes
    Appendix: Legendre Transformations
    Appendix: The Lagrange Multipliers
    Appendix: Methods of Counting
    Appendix: Calculus of Variations

    GENERAL INTRODUCTION TO ADSORPTION IN SOLIDS
    Definitions and Terminology
    Interfacial Layer, Gibbs Dividing Surface, and Gibbs Adsorption
    Thermodynamics of Gas-Solid Adsorption
    Gases and Vapors Adsorption in Porous Materials
    Some Examples of the Application of the Volumetric Method

    MICROPOROSITY AND SURFACE AREA EVALUATION
    The Dubinin and Osmotic Adsorption Isotherms
    Langmuir and Fowler-Guggenheim Type Adsorption Isotherm Equations
    The t-Plot Method
    Additional Comments about the Application of the Dubinin and Osmotic Isotherms, the LT and the FGT Isotherm Equation Types, and the t-Plot Method in the Measurement of the Micropore Volume
    The BET Method
    Horvath-Kawazoe Method

    NANOPOROUS MATERIALS MESOPOROSITY EVALUATION
    Capillary Condensation
    Macroscopic Theories to Describe Pore Condensation
    Density Functional Theory

    DIFFUSION IN POROUS MATERIALS
    Fick's Laws
    Transport, Self-Diffusion, and Corrected Coefficients
    Mean Square Displacement, the Random Walker, and Gaseous Diffusion
    Transport Mechanisms in Porous Media
    Viscous, Knudsen, and Transition Flows
    Viscous and Knudsen Flows in Model Porous Systems
    Transport in Real Porous Systems: Membranes
    Diffusion in Microporous Materials: Zeolites and Related Materials

    THE PLUG-FLOW ADSORPTION REACTOR
    Dynamic Adsorption
    The Plug-Flow Adsorption Reactor Model
    Appendix: Laplace Transforms

    AMORPHOUS POROUS ADSORBENTS: SILICA AND ACTIVE CARBON
    Basic Features of Amorphous Silica
    Amorphous Silica Morphology and Surface Chemistry
    Precipitated Amorphous Silica Synthesis
    Silica Modification
    Fundamental Characteristics of Active Carbon
    Active Carbon Morphology, Surface Chemistry, and Surface Modification
    Active Carbon Production Methods
    Some Applications of Precipitated Silica in Gas Phase Adsorption Processes
    Some Applications of Activated Carbons and Other Carbonaceous Materials in Gas-Phase Adsorption Processes

    CRYSTALLINE AND ORDERED NANOPOROUS MATERIALS
    Fundamental Characteristics of Zeolites and Mesoporous Molecular Sieves
    Structure
    Synthesis and Modification
    Some Applications of Crystalline and Ordered Nanoporous Materials in Gas Separation and Adsorption Processes

    ADSORPTION FROM LIQUID SOLUTION
    Surface Excess Amount and Amount of Adsorption for Liquid-Solid Adsorption Systems
    Empirical Adsorption Isotherms Applied for the Correlation of Liquid-Solid Adsorption Equilibria in Systems Containing One Dissolved Component
    Model Description of Adsorption from the Liquid Phase on Solids
    Some Applications of Liquid-Solid Adsorption

    *All Chapters Contain an Introduction and References

    Index

    Editorial Reviews

    ". . . a very good introduction to gas sorption and diffusion . . . would be very useful to have in any library particularly for those just starting out in the world of nanoporous materials."

    – A. Trewin, in Chromatagraphia, October 2008, Vol. 66, No. 7/8

     
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