Course detail
Sorption
FCH-DCO_SORAcad. year: 2011/2012
Adsorption methods will be thrash out for study of substance surface at both static and dynamic conditions. Theories of monomolecular and multilayer adsorption as well as theory of volume filling of micropores will be introduced in details. Special attention will be paid to following methods: high pressure mercury porosimetry, inverse gas and liquid chromatography and evaluation of substance texture from the viewpoint of fractal geometry.
Language of instruction
Mode of study
Guarantor
Learning outcomes of the course unit
Prerequisites
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Course curriculum
2. Theory of adsorption on solid substances - basic notions (adsorbent - adsorbate - adsorptive), characterisation of adsorption spots - homogenous and heterogeneous surfaces, interaction adsorbate-adsorbent, quantification of adsorption forces (Lennards-Jones potential), adsorption isotherms, Brunnauer classification of adsorption isotherms.
3.+4. Experimental procedures of texture parameter determination: adsorption methods - dynamic, static (gravity surveying, volumetric), method of inverse gas and liquid chromatography, adsorption from liquid environment, calorimetric methods, pyknometric methods, method of high pressure mercury porosimetry (Washburn equation, derivation), dispersion of RTG radiation under small angles.
5. Types of adsorption isotherms, monomolecular adsorption theory, Langmuir isotherm - description, derivation, linearization, determination of inner surface, practical examples.
6. Theory of multilayer adsorption (BET), derivation, linearization, calculation of inner surface, B-point.
7. Adsorption in micropores - theory of volume filling of micropores, Polányi potential, Dubinin-Polányi (Dubinin-Raduškevič) isotherm, Dubiniho postulates, translation of DP isotherm to other temperatures and adsorbates, calculation of micropore surface according to Medek.
8. Adsorption in interpores, capillary condensation, Kelvin equation, calculation of pore distribution according to their size.
9. Adsorption in flow regime, Glueckauf method of adsorption isotherm determination.
10. Adsorption from gas mixture - quantification procedures, sorption from liquid (water) environment, evaluation of experimental data, characterisation of adsorption spots for sorption of metal ions and organic pollutants.
11. Evaluation of substance texture from the viewpoint of fractal geometry, importance and possibility of fractal dimension D determination.
12. Gas and liquid flow through porous environment (viscous flow, Knudsen diffusion), specific permeability, relation between permeabile characteristics and texture parameters of solid substances, experimental procedures.
Work placements
Aims
Specification of controlled education, way of implementation and compensation for absences
Recommended optional programme components
Prerequisites and corequisites
Basic literature
Ponec,V., Knor,Z., Černý,S.: Adsorpce na tuhých látkách, Praha SNTL, 1968. (CS)
Recommended reading
Classification of course in study plans
- Programme DKCP_FCH Doctoral
branch DKCPO_FCH , 1 year of study, winter semester, compulsory-optional
- Programme DKCP_FCH_4 Doctoral
branch DKCPO_FCH_4 , 1 year of study, winter semester, compulsory-optional
- Programme DPCP_FCH_4 Doctoral
branch DPCPO_FCH_4 , 1 year of study, winter semester, compulsory-optional
- Programme DPCP_FCH Doctoral
branch DPCO_FCH , 1 year of study, winter semester, compulsory-optional
- Programme CKCP_CZV lifelong learning
branch CKCO_CZV , 1 year of study, winter semester, compulsory-optional
- Programme DKCP_FCH_4 Doctoral
branch DKCPO_FCH_4 , 2 year of study, winter semester, compulsory-optional
- Programme DPCP_FCH_4 Doctoral
branch DPCPO_FCH_4 , 2 year of study, winter semester, compulsory-optional