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Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments

A thin-channel gas chromatography column was designed and used to measure diffusion coefficients of water and iso propanol in polymer phase via inverse gas chromatography (ICC) technique. The thin-channel column inverse gas chromatography technique proved to be a simple, fast and efficient alternat...

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Main Author: Mohd. Nawawi, Mohd. Ghazali
Format: Article
Language:English
English
Published: Universiti Putra Malaysia Press 2000
Online Access:http://psasir.upm.edu.my/id/eprint/3514/1/Diffusion_Coefficient_Estimations_by_Thin-Channel_Colwnn.pdf
http://psasir.upm.edu.my/id/eprint/3514/
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spelling my.upm.eprints.35142013-05-27T07:09:06Z http://psasir.upm.edu.my/id/eprint/3514/ Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments Mohd. Nawawi, Mohd. Ghazali A thin-channel gas chromatography column was designed and used to measure diffusion coefficients of water and iso propanol in polymer phase via inverse gas chromatography (ICC) technique. The thin-channel column inverse gas chromatography technique proved to be a simple, fast and efficient alternative to sorption and desorption methods for measuring diffusion coefficients of permeants in thin polymer membranes films; the technique is especially useful when the problems associated with the irregularity of polymer distribution severely limit the accuracy of ICC measurement. Thin homogeneous chitosan membranes prepared by the solution casting technique were used as the stationary phase to provide a relatively uniform layer of polymer phase in the gas chromatography column. The diffusion coefficient of water was higher than that of isopropanol and diffusion coefficients of the permeants increased with column temperature. The effects of permeants size on diffusion coefficients were investigated on a series of alcohols: methanol, ethanol and isopropanol. The diffusion coefficients were inversely related to the permeants size. Universiti Putra Malaysia Press 2000 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3514/1/Diffusion_Coefficient_Estimations_by_Thin-Channel_Colwnn.pdf Mohd. Nawawi, Mohd. Ghazali (2000) Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments. Pertanika Journal of Science & Technology, 8 (1). pp. 1-18. ISSN 0128-7680 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description A thin-channel gas chromatography column was designed and used to measure diffusion coefficients of water and iso propanol in polymer phase via inverse gas chromatography (ICC) technique. The thin-channel column inverse gas chromatography technique proved to be a simple, fast and efficient alternative to sorption and desorption methods for measuring diffusion coefficients of permeants in thin polymer membranes films; the technique is especially useful when the problems associated with the irregularity of polymer distribution severely limit the accuracy of ICC measurement. Thin homogeneous chitosan membranes prepared by the solution casting technique were used as the stationary phase to provide a relatively uniform layer of polymer phase in the gas chromatography column. The diffusion coefficient of water was higher than that of isopropanol and diffusion coefficients of the permeants increased with column temperature. The effects of permeants size on diffusion coefficients were investigated on a series of alcohols: methanol, ethanol and isopropanol. The diffusion coefficients were inversely related to the permeants size.
format Article
author Mohd. Nawawi, Mohd. Ghazali
spellingShingle Mohd. Nawawi, Mohd. Ghazali
Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
author_facet Mohd. Nawawi, Mohd. Ghazali
author_sort Mohd. Nawawi, Mohd. Ghazali
title Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
title_short Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
title_full Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
title_fullStr Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
title_full_unstemmed Diffusion Coefficient Estimations by Thin-Channel Column Inverse Gas Chromatography : Preliminary Experiments
title_sort diffusion coefficient estimations by thin-channel column inverse gas chromatography : preliminary experiments
publisher Universiti Putra Malaysia Press
publishDate 2000
url http://psasir.upm.edu.my/id/eprint/3514/1/Diffusion_Coefficient_Estimations_by_Thin-Channel_Colwnn.pdf
http://psasir.upm.edu.my/id/eprint/3514/
_version_ 1643822632929329152
score 13.211869

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