Modified BET Equation for Determination of Micropore Pore Volume and Mesopore Surface Area in Microporous-Mesoporous Solids

0356436 - ÚCHP 2011 RIV GB eng C - Conference Paper (international conference)
Šolcová, Olga - Matějová, Lenka - Hudec, P. - Schneider, Petr
Modified BET Equation for Determination of Micropore Pore Volume and Mesopore Surface Area in Microporous-Mesoporous Solids.
Characterisation of Porous Solids VIII. Cambridge: Royal Society of Chemistry Publishing, 2009 - (Kaskel, S.; Llewellyn, P.; Rodriguez-Reinoso, F.; Seaton, N.), s. 218-224. ISBN 978-1-84755-904-3. ISSN 0260-6291.
[International Symposium on the Characterization of Porous Solids /8./. Edinburg (GB), 10.06.2008-13.06.2008]
R&D Projects: GA AV ČR IAA4072404; GA AV ČR KAN400720701
Grant - others:GA VEGA(SK) 1/3575/06
Institutional research plan: CEZ:AV0Z40720504
Keywords : microporous-mesoporous solids * mesopore surface area * BET equation
Subject RIV: CA - Inorganic Chemistry

Evaluation of micropore volume and mesopore surface area in microporous-mesoporous samples is presented. A series of mechanical mixtures of microporous zeolite NaY, and mesoporous gama-alumina was used for verification of the applicability of the (three-parameter) modified BET equation. The nitrogen adsorption isotherms (77 K) were analyzed by the modified (three parameters) BET equation and compared with the independent textural information obtained a) from t-plots (with the standard isotherm of nonporous gama-alumina and the standard isotherms of Lecloux-Pirard) and b) by subtracting the isotherm of the parent NaY from mixed sample isotherms. Similarly, nitrogen adsorption isotherms of rutile samples with micropores blocked by n-nonane, from the literature were tested. For illustration, the failure of classic (two-parameter) BET equation for microporous-mesoporous samples is demonstrated
Permanent Link: http://hdl.handle.net/11104/0194958