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Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether

In this research project, blended chitosan/poly(vinyl alcohol) (PVA) membranes were produced by mixing PVA and chitosan solutions. Chitosan (CS) was first dissolved in acetic acid aqueous solution before PVA solution was added. The mixture was then cured at room temperature. The modified composite m...

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Main Author: Mohd. Sakri, Norhaslina
Format: Thesis
Language:English
Published: 2009
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/36574/1/NorhaslinaMohdSakriMFKKKSA2009.pdf
http://eprints.utm.my/id/eprint/36574/
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spelling my.utm.365742018-06-25T09:05:56Z http://eprints.utm.my/id/eprint/36574/ Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether Mohd. Sakri, Norhaslina TP Chemical technology In this research project, blended chitosan/poly(vinyl alcohol) (PVA) membranes were produced by mixing PVA and chitosan solutions. Chitosan (CS) was first dissolved in acetic acid aqueous solution before PVA solution was added. The mixture was then cured at room temperature. The modified composite membrane was prepared by coating the mixture of chitosan and PVA solution onto the porous polysulfone membrane by the solution casting technique. The porous polysulfone substrate was prepared via phase inversion process from a casting solution containing 12 wt% polysulfone, 11 wt% polyethylene glycol and 77 wt% N,N- dimethylacetamide. The weight percent of chitosan in the membrane was varied from 20 wt. % to 100 wt. % while the membrane thickness was in the range of 15-30 µm. The unmodified and modified composite membranes with PVA were used in pervaporation separation of methanol/methyl-tert-butyl ether (MTBE) mixture. The swelling degree and the total flux increased with increasing chitosan content in the membranes. 30 wt. % of methanol (MeOH) in feed was chose since it gave the optimal overall pervaporation characteristics in terms of flux and separation factor. The membrane containing chitosan 20 wt. % to 40 wt. % performed the best. At operating temperature of 50 oC for 20 wt % to 40 wt % of chitosan, the fluxes obtained are at 52.28 g/m2.hr and 66.92 g/m2.hr with the separation factors of 81.00 and 53.22 respectively. The effect of temperature on flux followed the Arrhenius relationship. The membrane showed excellent performance for separation of MeOH/MTBE mixture when the quantity of MeOH in feed is small. It is a very suitable process for the recovery purpose in order to remove excess MeOH in the MTBE system. 2009-03 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/36574/1/NorhaslinaMohdSakriMFKKKSA2009.pdf Mohd. Sakri, Norhaslina (2009) Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether. Masters thesis, Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Mohd. Sakri, Norhaslina
Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
description In this research project, blended chitosan/poly(vinyl alcohol) (PVA) membranes were produced by mixing PVA and chitosan solutions. Chitosan (CS) was first dissolved in acetic acid aqueous solution before PVA solution was added. The mixture was then cured at room temperature. The modified composite membrane was prepared by coating the mixture of chitosan and PVA solution onto the porous polysulfone membrane by the solution casting technique. The porous polysulfone substrate was prepared via phase inversion process from a casting solution containing 12 wt% polysulfone, 11 wt% polyethylene glycol and 77 wt% N,N- dimethylacetamide. The weight percent of chitosan in the membrane was varied from 20 wt. % to 100 wt. % while the membrane thickness was in the range of 15-30 µm. The unmodified and modified composite membranes with PVA were used in pervaporation separation of methanol/methyl-tert-butyl ether (MTBE) mixture. The swelling degree and the total flux increased with increasing chitosan content in the membranes. 30 wt. % of methanol (MeOH) in feed was chose since it gave the optimal overall pervaporation characteristics in terms of flux and separation factor. The membrane containing chitosan 20 wt. % to 40 wt. % performed the best. At operating temperature of 50 oC for 20 wt % to 40 wt % of chitosan, the fluxes obtained are at 52.28 g/m2.hr and 66.92 g/m2.hr with the separation factors of 81.00 and 53.22 respectively. The effect of temperature on flux followed the Arrhenius relationship. The membrane showed excellent performance for separation of MeOH/MTBE mixture when the quantity of MeOH in feed is small. It is a very suitable process for the recovery purpose in order to remove excess MeOH in the MTBE system.
format Thesis
author Mohd. Sakri, Norhaslina
author_facet Mohd. Sakri, Norhaslina
author_sort Mohd. Sakri, Norhaslina
title Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
title_short Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
title_full Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
title_fullStr Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
title_full_unstemmed Blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
title_sort blended chitosan and poly(vinyl alcohol) membranes for the pervaporation of methanol and methyl tert-butyl ether
publishDate 2009
url http://eprints.utm.my/id/eprint/36574/1/NorhaslinaMohdSakriMFKKKSA2009.pdf
http://eprints.utm.my/id/eprint/36574/
_version_ 1643649984900366336
score 13.211869

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