Pore-Volume and Surface Area in Microporous-Mesoporous Solids

0313858 - ÚCHP 2009 RIV NL eng J - Journal Article
Schneider, Petr - Hudec, P. - Šolcová, Olga
Pore-Volume and Surface Area in Microporous-Mesoporous Solids.
[Stanovení objemu a plochy pórů v materiálech s mikro i mesoporézní strukturou.]
Microporous and Mesoporous Materials. Roč. 115, č. 3 (2008), s. 491-496. ISSN 1387-1811. E-ISSN 1873-3093
R&D Projects: GA AV ČR IAA4072404; GA AV ČR KAN400720701
Grant - others:GA SR(SK) VEGA1/3575/06
Institutional research plan: CEZ:AV0Z40720504
Keywords : adsorption isotherm * microporous-mesoporous samples * modified BET equation
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.555, year: 2008

To show the correct evaluation of pore-volume and surface area in microporous-mesoporous samples a series of mechanical mixtures of microporous zeolite NaY, and mesoporous gama-alumina was prepared. 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 alfa-alumina and the standard isotherms of Lecloux-Pirard) and b) by subtracting the isotherm of the parent NaY from mixed sample isotherms. For illustration, the failure of classic (two-parameter) BET equation for samples of this type was demonstrated.

Korektní stanovení objemu pórů včetně mikropórů a plochy mesopórů je předvedeno na sadě vzorků obsahujících mikroporézní zeolit NaY a mesoporézní gama aluminu v různém poměru.
Permanent Link: http://hdl.handle.net/11104/0164554