Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining

Over recent years, there has been an explosive growth of interest in the development of alternative approaches for crude palm oil (CPO) refining. During a typical refinery process, free fatty acid (FFA) is one of the key impurities that need to be reduced if not completely removed from CPO in order...

Full description

Saved in:

Bibliographic Details
Main Author:	Azmi, Rabiah Assyamiah
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/78413/1/RabiahAssyamiyahAzmiMFChE2016.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.78413
record_format	uketd_dc
spelling	my-utm-ep.784132018-08-26T04:56:29Z Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining 2016-04 Azmi, Rabiah Assyamiah TP Chemical technology Over recent years, there has been an explosive growth of interest in the development of alternative approaches for crude palm oil (CPO) refining. During a typical refinery process, free fatty acid (FFA) is one of the key impurities that need to be reduced if not completely removed from CPO in order to minimize their detrimental effects on the oil quality. Polyvinylidene fluoride (PVDF) membrane shows great potential in removing FFA from CPO owing to its hydrophobic properties, high mechanical strength and good thermal stability. However, low concentration of FFA in CPO, which is normally ranging from 3 to 5%, has hindered the capability of the membranes to separate the trace amount of FFA from the bulk. Thus, modification of PVDF membrane is essential to enhance the interaction between the membrane surface and FFA molecules to facilitate efficient FFA removal. In order to achieve this purpose in the present study, the outer surface of PVDF hollow fiber membranes was crosslinked with polyvinyl alcohol (PVA). Glutaraldehyde was used as a crosslinking agent to avoid the PVA dissolution. Morphological change was observed on the membrane surface with longer immersion time during the crosslinking process. The contact angle was significantly reduced in proportional to the concentration of PVA used for the crosslinking, addition of catalyst which is hydrochloric acid as well as the immersion time, which indicates the enhanced surface hydrophilicity. Additionally, the average roughness of the crosslinked PVDF membranes increased with the increasing of PVA concentration. The results obtained showed that the PVDF hollow fiber crosslinked with 100 ppm PVA exhibited the highest FFA rejection of 5.93% after 3 hours of operation. In addition, the membrane also capable of removing phosphorus content as high as 90% rejection as well as partial reduction of its colour intensity. This study served as the first attempt of CPO deacidification through membrane system without the addition of any chemical during the filtration process. 2016-04 Thesis http://eprints.utm.my/id/eprint/78413/ http://eprints.utm.my/id/eprint/78413/1/RabiahAssyamiyahAzmiMFChE2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94710 masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Azmi, Rabiah Assyamiah Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
description	Over recent years, there has been an explosive growth of interest in the development of alternative approaches for crude palm oil (CPO) refining. During a typical refinery process, free fatty acid (FFA) is one of the key impurities that need to be reduced if not completely removed from CPO in order to minimize their detrimental effects on the oil quality. Polyvinylidene fluoride (PVDF) membrane shows great potential in removing FFA from CPO owing to its hydrophobic properties, high mechanical strength and good thermal stability. However, low concentration of FFA in CPO, which is normally ranging from 3 to 5%, has hindered the capability of the membranes to separate the trace amount of FFA from the bulk. Thus, modification of PVDF membrane is essential to enhance the interaction between the membrane surface and FFA molecules to facilitate efficient FFA removal. In order to achieve this purpose in the present study, the outer surface of PVDF hollow fiber membranes was crosslinked with polyvinyl alcohol (PVA). Glutaraldehyde was used as a crosslinking agent to avoid the PVA dissolution. Morphological change was observed on the membrane surface with longer immersion time during the crosslinking process. The contact angle was significantly reduced in proportional to the concentration of PVA used for the crosslinking, addition of catalyst which is hydrochloric acid as well as the immersion time, which indicates the enhanced surface hydrophilicity. Additionally, the average roughness of the crosslinked PVDF membranes increased with the increasing of PVA concentration. The results obtained showed that the PVDF hollow fiber crosslinked with 100 ppm PVA exhibited the highest FFA rejection of 5.93% after 3 hours of operation. In addition, the membrane also capable of removing phosphorus content as high as 90% rejection as well as partial reduction of its colour intensity. This study served as the first attempt of CPO deacidification through membrane system without the addition of any chemical during the filtration process.
format	Thesis
qualification_level	Master's degree
author	Azmi, Rabiah Assyamiah
author_facet	Azmi, Rabiah Assyamiah
author_sort	Azmi, Rabiah Assyamiah
title	Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
title_short	Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
title_full	Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
title_fullStr	Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
title_full_unstemmed	Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
title_sort	polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/78413/1/RabiahAssyamiyahAzmiMFChE2016.pdf
_version_	1747817982924423168

Polyvinyl alcohol-crosslinked polyvinylidene fluoride hollow fiber membrances for crude palm oil refining

Similar Items