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Adsorption characteristics of octadecylsilyl-silica gel in gaseous systems

✍ Scribed by Kanji Miyabe; Motoyuki Suzuki

Publisher
American Institute of Chemical Engineers
Year
1993
Tongue
English
Weight
629 KB
Volume
39
Category
Article
ISSN
0001-1541

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✦ Synopsis

Adsorption rates and thermodynamic parameters were determined for the gasphase adsorption of n-alkanes and benzene derivatives on octadecylsilyl-silica gel ( ODs) by chromatographic measurement and moment analysis. Thermodynamic characteristics of adsorption phenomena on ODs were similar to those on the surface.

The contribution of intraparticle diffusion to mass-transport resistance was dominant in the ODs column, and the role of surface diffusion was significant for the intraparticle diffusion. The values of the surface diffusion coefficient were of the order of lo-' cm2/s and could be estimated by assuming that the surface migration on

ODs is a tracer diffusion of an adsorbate molecule in n-octadecane.

πŸ“œ SIMILAR VOLUMES

Chromatography of liquid-phase adsorptio
Chromatography of liquid-phase adsorption on octadecylsilyl-silica gel
✍ Kanji Miyabe; Motoyuki Suzuki πŸ“‚ Article πŸ“… 1992 πŸ› American Institute of Chemical Engineers 🌐 English βš– 857 KB

## Abstract Intraparticle diffusion and adsorption equilibrium on octadecylsilyl‐silica gel (ODS) were studied. As an adsorbate, p‐tert‐octylphenol (PTOP) was employed. The intraparticle diffusion coefficient was measured by the chromatographic technique and the moment analysis at zero and several

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The purpose of this work is to measure adsorption iso-Branched-chain polyfluorosilane (monochlorodimethyl[4,4-bistherms of polar and nonpolar molecules on silica gels modi-(trifluoromethyl)-5,5,6,6,7,7,7-heptafluoroheptyl)-bonded silica fied with various silylation agents, and to discuss the surface