Comparison of Transport Characteristics and Textural Properties of Porous Material; the Role of Pore Sizes and Their Distributions

0055166 - UCHP-M 20060178 RIV NL eng J - Journal Article
Hejtmánek, Vladimír - Schneider, Petr - Soukup, Karel - Šolcová, Olga
Comparison of Transport Characteristics and Textural Properties of Porous Material; the Role of Pore Sizes and Their Distributions.
[Srovnání transportních charakteristik a texturních vlastností porézních materiálů; úloha velikosti pórů a jejich distribuce.]
Studies in Surface Science and Catalysis. Roč. 160, - (2006), s. 1-8. ISSN 0167-2991.
[International Symposium on the Characterisation of Porous Solids COPS VII /7./. Aix en Provance, 26.05.2005-28.05.2005]
R&D Projects: GA ČR(CZ) GA104/04/0963; GA ČR GD203/03/H140; GA AV ČR IAA4072404
Institutional research plan: CEZ:AV0Z40720504
Keywords : counter-current gas diffusion * transport parameters * Maxwell-Stefan equation
Subject RIV: CA - Inorganic Chemistry
Impact factor: 0.307, year: 2005

Based on a study of a set of porous materials with wide range of mean pore radii (from 50 to 3000 nm) and mono- or bidisperse pore structure the comparison of obtained transport characteristics and textural properties is discussed. Structure characteristics relevant to transport processes were evaluated from multicomponent diffusion and permeation measurements. For data analysis the Mean Transport Pore Model (MTPM) based on Maxwell – Stefan diffusion equation and Weber permeation law was used. Two standard methods - physical adsorption of nitrogen and mercury porosimetry (ASAP2010M and AutoPore 9200, Micromeritics, USA) were used for determination of textural properties. Results from liquid expulsion permporometry measurement that correspond to situation in industrial processes were also taken into account. For some porous materials transport characteristics obtained from permeation and diffusion analyses are shown in Table.

Pro srovnání transportních charakteristik a texturních vlastností porézních materiálů byla použita sada porézních materiálů s různou porézní strukturou (mono, či více disperzní).
Permanent Link: http://hdl.handle.net/11104/0142987