Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation

The objective of this study is to develop Polyetherimide (PEI) mixed matrix membranes (MMM) by incorporating large pore size fillers. This study was divided into two main parts. In the first part, the existing MMM permeation models were evaluated and based on series-parallel resistors approach, a ne...

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Main Author:	Hashemifard, Seyed Abdollatif
Format:	Thesis
Language:	English
Published:	2011
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/31281/5/SeyedAbdollatifHashemfardPFPREE2011.pdf
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spelling	my-utm-ep.312812018-05-27T07:08:25Z Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation 2011-07 Hashemifard, Seyed Abdollatif TP Chemical technology The objective of this study is to develop Polyetherimide (PEI) mixed matrix membranes (MMM) by incorporating large pore size fillers. This study was divided into two main parts. In the first part, the existing MMM permeation models were evaluated and based on series-parallel resistors approach, a new model has been developed. The developed model was capable to predict gas permeation for all wellknown MMMs morphologies and a good agreement was achieved between the model and the experimental data from open literature. The first part was extended by proposing a morphological map which by virtue the prediction of MMMs morphologies was achievable. The second part of the work was performed to investigate the effect of incorporation of montmorillonite (MMT) and halloysite nano tubes (HNT) as large pore size filler in MMMs for gas separation. MMMs were fabricated using a dry/wet casting technique. The chemical modification of HNTs involved silylation and Ag+ ion exchange treatment. The silylated HNTs was prepared by treating them with N-b-(aminoethyl)-g-aminopropyltrimethoxy silane agent. The results from thermal gravimetric analysis (TGA) and Fourier transform infra red spectroscopy (FTIR) confirmed that chemical modification on clay surface has taken place successfully. A perfect compatibility between the polymer matrix and filler was observed from field emission scanning electron microscopy (FESEM) micrographs. The outcomes showed that, 0.5% loading of silylated-HNT resulted in 27% enhancement in CO2 permeability and 8% increase in selectivity relative to the neat polymer membrane. In order to apply the facilitated transport properties in MMMs, Ag+ ion exchange treatment was performed because of its high affinity toward CO2 rather than CH4. Results showed that silane can successfully enhance the HNTs cation exchange capacity, which led to higher concentration of Ag+ ions in the modified HNTs. Ag+ ion exchange exhibited about 250% enhancement in CO2 permeability. The effect of montmorillonite nano-clay fillers on PEI MMM was also studied. The gas permeation results revealed the following order in terms of selectivity for CO2/CH4 separation: Cloisite 15A > general MMT > hydrophilic MMT > hydrophobic MMT > raw MMT. In conclusion, the best results were achieved at 0.5% of Cloisite 15A loading where permeability and selectivity enhancements were 24% and 28% respectively. 2011-07 Thesis http://eprints.utm.my/id/eprint/31281/ http://eprints.utm.my/id/eprint/31281/5/SeyedAbdollatifHashemfardPFPREE2011.pdf application/pdf en public 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	TP Chemical technology
spellingShingle	TP Chemical technology Hashemifard, Seyed Abdollatif Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
description	The objective of this study is to develop Polyetherimide (PEI) mixed matrix membranes (MMM) by incorporating large pore size fillers. This study was divided into two main parts. In the first part, the existing MMM permeation models were evaluated and based on series-parallel resistors approach, a new model has been developed. The developed model was capable to predict gas permeation for all wellknown MMMs morphologies and a good agreement was achieved between the model and the experimental data from open literature. The first part was extended by proposing a morphological map which by virtue the prediction of MMMs morphologies was achievable. The second part of the work was performed to investigate the effect of incorporation of montmorillonite (MMT) and halloysite nano tubes (HNT) as large pore size filler in MMMs for gas separation. MMMs were fabricated using a dry/wet casting technique. The chemical modification of HNTs involved silylation and Ag+ ion exchange treatment. The silylated HNTs was prepared by treating them with N-b-(aminoethyl)-g-aminopropyltrimethoxy silane agent. The results from thermal gravimetric analysis (TGA) and Fourier transform infra red spectroscopy (FTIR) confirmed that chemical modification on clay surface has taken place successfully. A perfect compatibility between the polymer matrix and filler was observed from field emission scanning electron microscopy (FESEM) micrographs. The outcomes showed that, 0.5% loading of silylated-HNT resulted in 27% enhancement in CO2 permeability and 8% increase in selectivity relative to the neat polymer membrane. In order to apply the facilitated transport properties in MMMs, Ag+ ion exchange treatment was performed because of its high affinity toward CO2 rather than CH4. Results showed that silane can successfully enhance the HNTs cation exchange capacity, which led to higher concentration of Ag+ ions in the modified HNTs. Ag+ ion exchange exhibited about 250% enhancement in CO2 permeability. The effect of montmorillonite nano-clay fillers on PEI MMM was also studied. The gas permeation results revealed the following order in terms of selectivity for CO2/CH4 separation: Cloisite 15A > general MMT > hydrophilic MMT > hydrophobic MMT > raw MMT. In conclusion, the best results were achieved at 0.5% of Cloisite 15A loading where permeability and selectivity enhancements were 24% and 28% respectively.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Hashemifard, Seyed Abdollatif
author_facet	Hashemifard, Seyed Abdollatif
author_sort	Hashemifard, Seyed Abdollatif
title	Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
title_short	Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
title_full	Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
title_fullStr	Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
title_full_unstemmed	Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
title_sort	development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation
granting_institution	Universiti Teknologi Malaysia, Faculty of Petroleum and Renewable Energy Engineering
granting_department	Faculty of Petroleum and Renewable Energy Engineering
publishDate	2011
url	http://eprints.utm.my/id/eprint/31281/5/SeyedAbdollatifHashemfardPFPREE2011.pdf
_version_	1747815765838397440

Development and modelling of mixed matrix membranes incorporating large pore size clay for gas separation

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