Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption

The main objective in this research was to study the effect of air-gap length, one of the main spinning parameters, on the structure and carbon dioxide (CO2) absorption performance of hollow fiber membrane (HFM), while other spinning conditions were kept constant. Firstly, surface modified Polyvinyl...

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Main Author:	Korminouri, Fatemeh
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/78140/1/FatemehKorminouriMFCHE20141.pdf
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spelling	my-utm-ep.781402018-07-25T08:17:43Z Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption 2014-02 Korminouri, Fatemeh TP Chemical technology The main objective in this research was to study the effect of air-gap length, one of the main spinning parameters, on the structure and carbon dioxide (CO2) absorption performance of hollow fiber membrane (HFM), while other spinning conditions were kept constant. Firstly, surface modified Polyvinylidene fluoride (PVDF) hollow fiber membranes were spun via dry-wet spinning method under different air-gap lengths (0-20 cm). Then the morphology of prepared membranes was evaluated by scanning electron microscopy (SEM). Also membranes structure was examined in terms of gas permeation, overall porosity, critical water entry pressure (CEPw) and contact angle. To determine the CO2 flux of HFMs, a system of gas-liquid membrane contactor was used. Experimental results of this study reveal that by increasing the air-gap distance from 0 to 20 cm, wetting resistance and contact angle of fabricated membranes increased due to enhancement of membrane surface hydrophobicity in higher air-gaps. Moreover, a decrease in average pore size of fabricated membranes was observed in higher air-gaps. The highest helium (He) permeation was achieved for the spun fiber at the air-gap of 10 cm. From CO2 absorption experiment it was found that the prepared membrane at the air-gap of 10 cm had the maximum CO2 flux of 1.57×10-3 mol/m2.s at the absorbent flow rate of 300 ml/min, which was significantly higher than CO2 flux of other PVDF membranes produced by other researchers. This significant increase in the CO2 flux could be related to its high effective surface porosity. Considering the high CO2 flux of this membrane, it can be concluded that in this study, the optimum air-gap distance was 10 cm to fabricate surface modified PVDF hollow fiber membranes using dry-wet spinning method. Lastly, it was found that applying an appropriate air-gap length for fabrication of surface modified hollow fiber membranes could be a promising method to improve CO2 removal in membrane contactor systems. 2014-02 Thesis http://eprints.utm.my/id/eprint/78140/ http://eprints.utm.my/id/eprint/78140/1/FatemehKorminouriMFCHE20141.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:80497 masters Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Korminouri, Fatemeh Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
description	The main objective in this research was to study the effect of air-gap length, one of the main spinning parameters, on the structure and carbon dioxide (CO2) absorption performance of hollow fiber membrane (HFM), while other spinning conditions were kept constant. Firstly, surface modified Polyvinylidene fluoride (PVDF) hollow fiber membranes were spun via dry-wet spinning method under different air-gap lengths (0-20 cm). Then the morphology of prepared membranes was evaluated by scanning electron microscopy (SEM). Also membranes structure was examined in terms of gas permeation, overall porosity, critical water entry pressure (CEPw) and contact angle. To determine the CO2 flux of HFMs, a system of gas-liquid membrane contactor was used. Experimental results of this study reveal that by increasing the air-gap distance from 0 to 20 cm, wetting resistance and contact angle of fabricated membranes increased due to enhancement of membrane surface hydrophobicity in higher air-gaps. Moreover, a decrease in average pore size of fabricated membranes was observed in higher air-gaps. The highest helium (He) permeation was achieved for the spun fiber at the air-gap of 10 cm. From CO2 absorption experiment it was found that the prepared membrane at the air-gap of 10 cm had the maximum CO2 flux of 1.57×10-3 mol/m2.s at the absorbent flow rate of 300 ml/min, which was significantly higher than CO2 flux of other PVDF membranes produced by other researchers. This significant increase in the CO2 flux could be related to its high effective surface porosity. Considering the high CO2 flux of this membrane, it can be concluded that in this study, the optimum air-gap distance was 10 cm to fabricate surface modified PVDF hollow fiber membranes using dry-wet spinning method. Lastly, it was found that applying an appropriate air-gap length for fabrication of surface modified hollow fiber membranes could be a promising method to improve CO2 removal in membrane contactor systems.
format	Thesis
qualification_level	Master's degree
author	Korminouri, Fatemeh
author_facet	Korminouri, Fatemeh
author_sort	Korminouri, Fatemeh
title	Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
title_short	Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
title_full	Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
title_fullStr	Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
title_full_unstemmed	Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
title_sort	surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department	Faculty of Chemical and Energy Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/78140/1/FatemehKorminouriMFCHE20141.pdf
_version_	1747817916810657792

Surface modified polyvinylydene flouride hollow fiber membrane contactor with different air-gaps for carbon dioxide absorption

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