Physical adsorption on heterogeneous solids
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Bibliographic Information
Physical adsorption on heterogeneous solids
（Studies in physical and theoretical chemistry, 59）
Elsevier, 1988
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Includes bibliographies and index
Description and Table of Contents
Description
This book presents a unified description of physical adsorption on heterogeneous solids from both the gas and liquid phases. All solid adsorbents of great practical importance, such as activated carbons, silica gels, aluminium oxides, zeolites, etc., possess surface and structural heterogeneities, which play a dominant role in the adsorption process especially at low pressures. The assumption of adsorbent heterogeneity in studies of physical adsorption introduces considerable difficulties in the theoretical description of this phenomenon. To overcome this problem, the authors have presented a relatively simple theory of physical adsorption on heterogeneous solids, which provides a quantitative description of this phenomenon and simultaneously permits elaboration of methods for characterizing adsorbent heterogeneity. The chapter on single-gas adsorption on heterogeneous surfaces is the most extensive one in the book because there is a great deal of scientific literature concerning this problem. Moreoever, the theory of single-gas adsorption provides foundations for deriving equations that apply to adsorption from multicomponent gas and liquid mixtures.
Table of Contents
1. Sorption Phenomena. General description. Fundamental assumptions. Adsorbent heterogeneity in physical adsorption. 2. Adsorption of Single Gases. Fundamental integral equation for the overall adsorption isotherm. A descriptive survey of solutions of the integral equation with Langmuir local behavior. Monolayer localized adsorption of gases without lateral interactions. Approximate methods of solution of the integral equation. Adsorption on surfaces composed of subsurfaces. Thermodynamics of the adsorption. Multilayer localized adsorption of gases. 3. Characterization of Solids. Physical and numerical aspects of evaluation of the energy-distributed function. Solutions of the integral equation with respect to the energy distribution function. Advanced numerical algorithms for solving the integral equation of adsorption. Application of numerical methods for determining energy distribution functions from adsorption isotherms. Application of other measurements for estimating the energetic heterogeneity of solids. 4. Adsorption of Gas Mixtures. General integral equation for mixed-gas adsorption. Simplified integral equations for mixed-gas adsorption. Isotherm equations for monolayer mixed-gas adsorption. Multilayer mixed-gas adsorption. 5. Kinetics of Gas Adsorption on Solids. Kinetics of single-gas adsorption. Kinetics of mixed-gas adsorption. Equilibrium adsorption isotherms obtained from the rate equations. Stochastic modeling of adsorption kinetics. 6. Adsorption of Non-Electrolytic Liquid Mixtures. Introductory considerations. Adsorption models for the solid-liquid interface. Integral equations in adsorption of liquid mixtures on heterogeneous surfaces. Adsorption from binary solutions. Adsorption from multicomponent solutions. Adsorption at the liquid-solid interface of molecules of different sizes. Global surface activity coefficients. 7. Adsorption from Dilute Solutions. Solute adsorption from a single solvent. Solute adsorption from mixed solvents. 8. Absorption on Heterogeneous Microporous Solids. Adsorption on porous solids. Adsorption in micropores. (All chapters include an introduction and references). Appendix. Subject Index.
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