Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption

Porous asymmetric polysulfone (PSf) and polyvinyliden flouride (PVDF) hollow fiber membranes were structurally developed using surface modifying macromolecules (SMMs) as additives to improve hydrophobicity, wetting resistance and carbon dioxide (CO2) absorption/desorption flux in hollow fiber membra...

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Main Author:	Sisakht, Masoud Rahbari
Format:	Thesis
Language:	English
Published:	2013
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/33841/5/MasoudRahbariSisakhtPFPREE2013.pdf
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id	my-utm-ep.33841
record_format	uketd_dc
spelling	my-utm-ep.338412017-07-23T06:14:57Z Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption 2013-03 Sisakht, Masoud Rahbari QD Chemistry Porous asymmetric polysulfone (PSf) and polyvinyliden flouride (PVDF) hollow fiber membranes were structurally developed using surface modifying macromolecules (SMMs) as additives to improve hydrophobicity, wetting resistance and carbon dioxide (CO2) absorption/desorption flux in hollow fiber membrane contactor. The membrane structure was examined in terms of gas permeation, critical water entry pressure, overall porosity, contact angle and mass transfer resistance. The morphology of membrane was studied by scanning electron microscopy (SEM) instrument. The CO2 absorption and desorption performance of both surface modified membranes were investigated in a hollow fiber membrane contactor system and compared against the unmodified membranes. Pore size, overall porosity and contact angle of fabricated membranes increased significantly by surface modification. Surface modified PVDF and PSf membranes showed higher CO2 absorption and stripping flux compared to plain PVDF and PSf membranes. Results of long-term study demonstrated that after an initial CO2 flux reduction the surface modified membranes performance maintained constant over 130 h operation. By increasing SMM concentration in spinning dope to 6 wt.%, CO2 absorption and stripping flux increased. However, by increasing SMM concentration to 8 wt.% both CO2 absorption and stripping flux decreased, considerably. Thus, it can be concluded that for surface modification of PVDF and PSf hollow fiber membrane contactor 6 wt.% of SMM as additive is an optimum concentration. From CO2 stripping experiments it was found that liquid absorbent temperature played an important role on CO2 stripping flux but gas flow rate had no significant effect. Generally, it was found that the porous surface modified membrane can be a promising alternative for CO2 removal and stripping process. 2013-03 Thesis http://eprints.utm.my/id/eprint/33841/ http://eprints.utm.my/id/eprint/33841/5/MasoudRahbariSisakhtPFPREE2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:69617?site_name=Restricted Repository phd doctoral Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering Faculty of Petroleum and Renewable Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Sisakht, Masoud Rahbari Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
description	Porous asymmetric polysulfone (PSf) and polyvinyliden flouride (PVDF) hollow fiber membranes were structurally developed using surface modifying macromolecules (SMMs) as additives to improve hydrophobicity, wetting resistance and carbon dioxide (CO2) absorption/desorption flux in hollow fiber membrane contactor. The membrane structure was examined in terms of gas permeation, critical water entry pressure, overall porosity, contact angle and mass transfer resistance. The morphology of membrane was studied by scanning electron microscopy (SEM) instrument. The CO2 absorption and desorption performance of both surface modified membranes were investigated in a hollow fiber membrane contactor system and compared against the unmodified membranes. Pore size, overall porosity and contact angle of fabricated membranes increased significantly by surface modification. Surface modified PVDF and PSf membranes showed higher CO2 absorption and stripping flux compared to plain PVDF and PSf membranes. Results of long-term study demonstrated that after an initial CO2 flux reduction the surface modified membranes performance maintained constant over 130 h operation. By increasing SMM concentration in spinning dope to 6 wt.%, CO2 absorption and stripping flux increased. However, by increasing SMM concentration to 8 wt.% both CO2 absorption and stripping flux decreased, considerably. Thus, it can be concluded that for surface modification of PVDF and PSf hollow fiber membrane contactor 6 wt.% of SMM as additive is an optimum concentration. From CO2 stripping experiments it was found that liquid absorbent temperature played an important role on CO2 stripping flux but gas flow rate had no significant effect. Generally, it was found that the porous surface modified membrane can be a promising alternative for CO2 removal and stripping process.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Sisakht, Masoud Rahbari
author_facet	Sisakht, Masoud Rahbari
author_sort	Sisakht, Masoud Rahbari
title	Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
title_short	Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
title_full	Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
title_fullStr	Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
title_full_unstemmed	Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
title_sort	surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption
granting_institution	Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering
granting_department	Faculty of Petroleum and Renewable Energy Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/33841/5/MasoudRahbariSisakhtPFPREE2013.pdf
_version_	1747816198284771328

Surface modified hollow fiber membrane contactor for carbon dioxide absorption and desorption

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