Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation

Metal-Organic Framework (MOF) materials such as Zeolitic Imidazole Framework 8 (ZIF-8) have been considered among ideal filler in mixed matrix membrane (MMM) due to their good compatibility with various polymer matrices. However, limitations suffered by ZIF-8 such as commercially expensive and hardl...

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Main Author:	Sapiaa Md. Nordin, Nik Abdul Hadi
Format:	Thesis
Language:	English
Published:	2015
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/54746/1/NikAbdulHadiSapiaaMdNordinPFPREE2015.pdf
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spelling	my-utm-ep.547462020-11-05T05:46:41Z Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation 2015-07 Sapiaa Md. Nordin, Nik Abdul Hadi T Technology (General) Metal-Organic Framework (MOF) materials such as Zeolitic Imidazole Framework 8 (ZIF-8) have been considered among ideal filler in mixed matrix membrane (MMM) due to their good compatibility with various polymer matrices. However, limitations suffered by ZIF-8 such as commercially expensive and hardly available in small particle size and poor intrinsic separation properties have hindered its great potential. To address these issues, this study aims to synthesize and characterize ZIF-8, followed by fabricating and evaluating the performances of ZIF-8 loaded asymmetric flat sheet polysulfone (PSf) MMM for CO2/CH4 separation. ZIF- 8 was prepared via the method of aqueous room temperature media with base-type additive, triethylamine (TEA), with ratio ranging 0-0.007 to assist ZIF-8 formation. The synthesized ZIF-8s were characterized with respect to their phase crystallinity, particle size and thermal stability. The synthesis approach is considerably attractive due to relatively lower metal/ligands/solvent ratio requirement, rapid process, and high yield while retaining its intrinsic properties. The PSf/ZIF-8 MMMs incorporated with as-synthesized and heat-treated (100°C for 12 hours) ZIF-8 with different particle sizes (~100 nm, ~300 nm, and ~500 nm) were prepared via dry/wet phase inversion. The prepared membranes were evaluated with respect to their morphology, mechanical and thermal properties, and gas separation performance. Pure phase ZIF-8s were obtained with TEA/total mole ratios of 0.004-0.007 and its particle size decreased with increasing TEA ratios. The membrane characterizations as well as gas permeation test results showed that the heat-treated ZIF-8 with ~100nm particle size provided good interaction with PSf matrix. MMM loaded with 0.5wt% of heat-treated ZIF-8 produced the optimum CO2 permeance (29.22 GPU) and CO2/CH4 selectivity (23.16), while higher loading deteriorated the separation performances. Modification of ZIF-8 particle with 25mL and 50mL ammonium hydroxide solution at ice bath temperature, room temperature and 60°C was found to significantly improve its properties, i.e. phase crystallinity, pore properties and BET surface area, while preserving its overall structure. PSf/ZIF-8 MMM loaded with 0.5wt% ZIF-8 modified under 25mL ammonium hydroxide solution at 60°C increased CO2/CH4 selectivity 72% higher than neat PSf membrane, without diminishing CO2 permeance. Hence, the promising results obtained in this study demonstrates the potential of MOF, especially ZIF-8 based MMM for gas separation, specifically CO2 separation and thus warrants further investigation. 2015-07 Thesis http://eprints.utm.my/id/eprint/54746/ http://eprints.utm.my/id/eprint/54746/1/NikAbdulHadiSapiaaMdNordinPFPREE2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94332 phd doctoral Universiti Teknologi Malaysia, Faculty of Petroleum & Renewable Energy Engineering Faculty of Petroleum & Renewable Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	T Technology (General)
spellingShingle	T Technology (General) Sapiaa Md. Nordin, Nik Abdul Hadi Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
description	Metal-Organic Framework (MOF) materials such as Zeolitic Imidazole Framework 8 (ZIF-8) have been considered among ideal filler in mixed matrix membrane (MMM) due to their good compatibility with various polymer matrices. However, limitations suffered by ZIF-8 such as commercially expensive and hardly available in small particle size and poor intrinsic separation properties have hindered its great potential. To address these issues, this study aims to synthesize and characterize ZIF-8, followed by fabricating and evaluating the performances of ZIF-8 loaded asymmetric flat sheet polysulfone (PSf) MMM for CO2/CH4 separation. ZIF- 8 was prepared via the method of aqueous room temperature media with base-type additive, triethylamine (TEA), with ratio ranging 0-0.007 to assist ZIF-8 formation. The synthesized ZIF-8s were characterized with respect to their phase crystallinity, particle size and thermal stability. The synthesis approach is considerably attractive due to relatively lower metal/ligands/solvent ratio requirement, rapid process, and high yield while retaining its intrinsic properties. The PSf/ZIF-8 MMMs incorporated with as-synthesized and heat-treated (100°C for 12 hours) ZIF-8 with different particle sizes (~100 nm, ~300 nm, and ~500 nm) were prepared via dry/wet phase inversion. The prepared membranes were evaluated with respect to their morphology, mechanical and thermal properties, and gas separation performance. Pure phase ZIF-8s were obtained with TEA/total mole ratios of 0.004-0.007 and its particle size decreased with increasing TEA ratios. The membrane characterizations as well as gas permeation test results showed that the heat-treated ZIF-8 with ~100nm particle size provided good interaction with PSf matrix. MMM loaded with 0.5wt% of heat-treated ZIF-8 produced the optimum CO2 permeance (29.22 GPU) and CO2/CH4 selectivity (23.16), while higher loading deteriorated the separation performances. Modification of ZIF-8 particle with 25mL and 50mL ammonium hydroxide solution at ice bath temperature, room temperature and 60°C was found to significantly improve its properties, i.e. phase crystallinity, pore properties and BET surface area, while preserving its overall structure. PSf/ZIF-8 MMM loaded with 0.5wt% ZIF-8 modified under 25mL ammonium hydroxide solution at 60°C increased CO2/CH4 selectivity 72% higher than neat PSf membrane, without diminishing CO2 permeance. Hence, the promising results obtained in this study demonstrates the potential of MOF, especially ZIF-8 based MMM for gas separation, specifically CO2 separation and thus warrants further investigation.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Sapiaa Md. Nordin, Nik Abdul Hadi
author_facet	Sapiaa Md. Nordin, Nik Abdul Hadi
author_sort	Sapiaa Md. Nordin, Nik Abdul Hadi
title	Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
title_short	Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
title_full	Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
title_fullStr	Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
title_full_unstemmed	Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
title_sort	development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation
granting_institution	Universiti Teknologi Malaysia, Faculty of Petroleum & Renewable Energy Engineering
granting_department	Faculty of Petroleum & Renewable Energy Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/54746/1/NikAbdulHadiSapiaaMdNordinPFPREE2015.pdf
_version_	1747817716874477568

Development of asymmetric polysulfone and zeolitic imidazole framework 8 mixed matrix membrane for carbon dioxide and methane separation

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