Publikace detail

Influence of guest phase deposited on surface of porous support to its textural properties

Autoři: Bulánek Roman | Čičmanec Pavel | Setnička Michal | Drenchev Nikola Lyudmilov

Rok: 2013

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Influence of guest phase deposited on surface of porous support to its textural properties	The change in surface area and pore volume is evident even for samples with relatively low content of supported phase, which is atomically spread on the surface in form of anchored monomeric vanadyl species. These species cannot block the pore with 9 nm in diameter. Nevertheless the presence of such phase causes distinct decrease in adsorbed nitrogen during its physisorption as is apparent from adsorption isotherms and their evaluation by appropriate method (BET model, t-plot, DFT). Comparison of number missing N2 molecules (obtained from comparison of pore volume and surface area of V-SBA-15 catalyst and its appropriate referent silica support) with amount of vanadium supported led to conclusion that each vanadyl complex prevent adsorption of about two N2 molecules in one layer and influence two adsorption layers. Significant pore blocking occurs when the vanadium concentration reaches value higher than 12 wt.%.	BET; V-SBA catalyst; N2; DFT

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