Interaction of Ethanol Vapour with Silane-Modified Surface of Corning Porous Glass CPG-10 | Zendy

Misael Silas Nadiye-Tabbiruka | Zendy

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Interaction of Ethanol Vapour with Silane-Modified Surface of Corning Porous Glass CPG-10

Author(s) -

Misael Silas Nadiye-Tabbiruka

Publication year - 2012

Publication title -

isrn physical chemistry

Language(s) - English

Resource type - Journals

ISSN - 2090-7761

DOI - 10.5402/2012/254167

Subject(s) - silylation , adsorption , silane , capillary condensation , chemistry , sorption , condensation , chemical engineering , desorption , ethanol , materials science , organic chemistry , catalysis , thermodynamics , physics , engineering

The interaction of ethanol vapour at 293 K with modified Corning controlled porous glass (CPG-10) samples of various pre-silylation is reported. Ethanol adsorption on CPG-10 was greatly reduced by silylation to extents largely depending on the silylation extent, type of silane used, and on the concentration and accessibility of residual silanols. The obtained adsorption isotherms, BET surface areas, as well as the observed changes at the various stages during the sorption particularly in the capillary condensation region also showed similar dependence. In the capillary condensation region, in the case of the dimethyl dichlorosilane-modified sample, hysteresis type was changed from H3 to H1. On the triethyl chlorosilane-modified sample an unexpected suppression of hysteresis effects occurred with a consequent transformation of type IV to type II adsorption isotherm.

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