9350-3017/02 – Texture and behavior of solids (TCHPL)
| Gurantor department | Institute of Environmental Technology | Credits | 10 |
| Subject guarantor | Ing. Lenka Matějová, Ph.D. | Subject version guarantor | Ing. Lenka Matějová, Ph.D. |
| Study level | postgraduate | Requirement | Compulsory |
| Year | | Semester | winter + summer |
| | Study language | English |
| Year of introduction | 2019/2020 | Year of cancellation | |
| Intended for the faculties | FMT | Intended for study types | Doctoral |
Subject aims expressed by acquired skills and competences
Within the subject, students will learn about the textural properties of solids - morphology, external and internal surface, volume and distribution of pores, methods of their evaluation and quantification. Adsorption methods for studying the surface of substances under static and dynamic conditions will be discussed. The theories of monomolecular, multilayer adsorption, the theory of capillary condensation and the theory of volume filling of micropores will be presented in detail. Attention will be paid to the method of high-pressure mercury porosimetry, the method of inverse gas and liquid chromatography, as well as the method of texture evaluation from the point of view of fractal geometry. The connection between textural parameters and the behavior of solids will be shown.
Teaching methods
Individual consultations
Summary
The aim of the course is to deepen students' knowledge of textural properties of solids and methods of their evaluation and quantification.
Compulsory literature:
Gregg,S.J., Sing,K.S.W.: Adsorption, Surface Area and Porosity (2nd edition), Academic Press, London, 1982.
Recommended literature:
Way of continuous check of knowledge in the course of semester
Seminar work covering solved issues related to the dissertation focus using monographs, primary literary sources, and other available information sources.
E-learning
Other requirements
The level of understanding of the professional issues defined by this subject is verified by a face-to-face/oral exam. Before the given exam, students submit for assessment the solution of a set of practical, computational examples on the subjects of the subject. The correctness of the solutions to the examples is verified individually with the students before the actual examination.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Textural properties of solids – importance for industrial applications and for the behavior of substances in nature. Basic textural parameters (external, internal surface, apparent (mercury) and real (helium) solids density, total pore volume, pore distribution), characterization and size distribution of pores,
2. Theory of adsorption on solid substances - basic terms (adsorbent - adsorbate - adsorptive), characterization of adsorption sites - homogeneous, heterogeneous surfaces, adsorbate - adsorbent interaction, quantification of adsorption forces (Lennard - Jones potential), adsorption isotherms, Brunnauer's classification of adsorption isotherms.
3. Experimental procedures for determining textural parameters: adsorption methods – dynamic, static (gravimetric, volumetric); inverse gas and liquid chromatography method,
4. Adsorption from a liquid medium, calorimetric methods, pycnometric methods, high-pressure mercury porometry method (Washburn equation, derivation), X-ray scattering at small angles.
5. Types of adsorption isotherms, theory of monomolecular adsorption, Langmuir isotherm - description, derivation, linearization, determination of the internal surface, practical examples.
6. Multilayer adsorption theory (BET), derivation, linearization, internal surface calculation, point B.
7. Adsorption in micropores – theory of volume filling of micropores, Polányi potential, Dubinin – Polányi (Dubinin-Raduškevič) isotherm, Dibinin's postulates, conversion of DP isotherm to other temperatures and adsorbates, calculation of micropore surface according to Medek.
8-9. Adsorption in mesopores, capillary condensation, Kelvin equation, calculation of pore size distribution. Adsorption in a flow arrangement, Glueckauf's method of determination of adsorption isotherms.
10-11. Sorption from a liquid (aqueous) medium, evaluation of experimental data, characterization of adsorption sites for sorption of metal ions, organic pollutants. Evaluation of the texture of fabrics from the point of view of fractal geometry, the importance and possibilities of determining the fractal dimension D.
12. Flow of gases and liquids through a porous medium (viscous flow, Knudsen diffusion), specific permeability, connection between permeation characteristics and textural parameters of solid substances, experimental procedures.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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