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Abtin Ebadi Amooghin - One of the best experts on this subject based on the ideXlab platform.
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preparation and characterization of ag ion exchanged zeolite Matrimid 5218 mixed matrix membrane for co2 ch4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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Preparation and characterization of Ag+ ion-exchanged zeolite-Matrimid®5218 mixed matrix membrane for CO2/CH4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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improved co2 separation performance of Matrimid 5218 membrane by addition of low molecular weight polyethylene glycol
Greenhouse Gases-Science and Technology, 2015Co-Authors: Mahsa Loloei, Mohammadreza Omidkhah, Abdolreza Moghadassi, Abtin Ebadi AmooghinAbstract:Polyethylene glycols have received worldwide attention as a highly permeable CO2-philic polymer in carbon dioxide separation applications. In this study, we investigated the influence of a low molecular weight polyethylene glycol (PEG 200) on physicochemical, morphological, and gas separation properties of Matrimid®5218 as a novel polymer blend. Both symmetric and asymmetric Matrimid flat sheet membranes with 0–20 wt.% PEG were prepared via a dense film-casting method. The miscibility of blends at low PEG concentrations (3–5 wt.%) was confirmed by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Moreover, the blends were partially miscible at higher PEG concentrations (10–20 wt.%). Matrimid/PEG molecular interactions were further studied by FTIR and XRD analysis. SEM images indicated an impressive influence of PEG on the symmetric structure of Matrimid membrane. An asymmetric structure with a dense thin skin layer and a highly porous sub-layer was observed for the blends containing 10–20 wt.% PEG. The CO2 permeability and CO2/CH4 selectivity of the best-yield CO2-selective blend membrane (Matrimid/PEG (95:5)) incvreased about 25% (from 7.68 to 9.62 Barrer) and 15% (from 35 to 40) compared to pure Matrimid, respectively. Furthermore studying the plasticization pressures of the membranes revealed that the more PEG content in blend the less the plasticization pressure obtained. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd
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the effects of aminosilane grafting on nay zeolite Matrimid 5218 mixed matrix membranes for co2 ch4 separation
Journal of Membrane Science, 2015Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Ali KargariAbstract:s 5218 abstract The aminosilane grafting on micro-sized nanoporous sodium zeolite Y particles was performed and novel mixed matrix membranes (MMMs) were fabricated by embedding the modified particles into the Matrimid s 5218 matrix. The aminosilane grafting reaction was considered using 3-aminopropyl (diethoxy)methylsilane (APDEMS) as the silane coupling agent. DLS, BET, XRD, FTIR-ATR, CAM, SEM, and TG/DTG were investigated to characterize the pure zeolite (NaY), silane modified zeolite (Sm-NaY) and the fabricated MMMs. Moreover, the effects of filler content (0-20 wt%) on pure and mixed gas experiments, feed pressure (2-12 bar) and operating temperature (35-75 1C) on CO2/CH4 transport properties of Matrimid/Sm-NaY were surveyed. The obtained results revealed that at 15 wt% filler loading (the optimum condition), the CO2 permeability increased from 8.34 Barrer for Matrimid to 9.70 Barrer (about 16%). The related CO2/CH4 selectivity was considerably increased from 36.3 to 57.1 (about 57%). This superior performance at 15 wt% filler loading was related to the good dispersion of the silane modified NaY particles in the Matrimid matrix. The defect free polymer/filler interface was achieved by the aminosilanes grafted on the external surface of the zeolites.
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Improved CO2 separation performance of Matrimid®5218 membrane by addition of low molecular weight polyethylene glycol
Greenhouse Gases: Science and Technology, 2015Co-Authors: Mahsa Loloei, Mohammadreza Omidkhah, Abdolreza Moghadassi, Abtin Ebadi AmooghinAbstract:Polyethylene glycols have received worldwide attention as a highly permeable CO2-philic polymer in carbon dioxide separation applications. In this study, we investigated the influence of a low molecular weight polyethylene glycol (PEG 200) on physicochemical, morphological, and gas separation properties of Matrimid®5218 as a novel polymer blend. Both symmetric and asymmetric Matrimid flat sheet membranes with 0–20 wt.% PEG were prepared via a dense film-casting method. The miscibility of blends at low PEG concentrations (3–5 wt.%) was confirmed by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Moreover, the blends were partially miscible at higher PEG concentrations (10–20 wt.%). Matrimid/PEG molecular interactions were further studied by FTIR and XRD analysis. SEM images indicated an impressive influence of PEG on the symmetric structure of Matrimid membrane. An asymmetric structure with a dense thin skin layer and a highly porous sub-layer was observed for the blends containing 10–20 wt.% PEG. The CO2 permeability and CO2/CH4 selectivity of the best-yield CO2-selective blend membrane (Matrimid/PEG (95:5)) incvreased about 25% (from 7.68 to 9.62 Barrer) and 15% (from 35 to 40) compared to pure Matrimid, respectively. Furthermore studying the plasticization pressures of the membranes revealed that the more PEG content in blend the less the plasticization pressure obtained. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd
Mohammadreza Omidkhah - One of the best experts on this subject based on the ideXlab platform.
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Fabrication Parameters of Asymmetric Mixed Matrix Matrimid-MIL-53/PMHS Membrane for CO2/CH4 Separation
Iran Polymer and Petrochemical Institute, 2017Co-Authors: Fatereh Dorosti, Mohammadreza OmidkhahAbstract:Asymmetrically mixed matrix Matrimid-MIL-53 membranes with silicone cover layer were fabricated. For better understanding of membrane fabrication process, three main parameters of fabrication, Matrimid concentration, silicone concentration and weight percentage of metal organic framework (MIL-53) particles, were optimized by an experimental design method. Cross-section SEM images were used to study the membrane structure and polymer-particles interface. Moreover, thermal resistance of the membranes and the existence of various bonds in them were investigated by FTIR and TGA analyses. The results showed that membranes had porous structure with finger-like morphology. At low and moderate percentages of particles, there were no non-selective voids observed at polymer-particles interface. The thermal resistance of membranes increased with the increase of MIL-53 weight percentage and the destruction temperature of polymer increased from 410°C to 450°C. The permeability tests results showed that the Matrimid (20% wt)-MIL-53(15% wt)/PMHS (10%wt) membrane exhibited the highest level of CO2/CH4 selectivity (23.6). However, in the membrane with 30 wt% particles loading, selectivity decreased due to particles agglomeration and void formation. The experimental design results showed that the concentration of silicone in covering solution had significant effect. CO2 and CH4 permeability decreased and ideal selectivity of CO2/CH4 increased with silicone concentration enhancement. Although the Matrimid concentration had a little effect on CO2/CH4 ideal selectivity, its enhancement increased the selectivity of the gases. The optimization results showed the membrane with 17.8% of Matrimd polymer, 13.2% of silicone polymer and 15.5 wt% of MIL-53 particle displayed the highest selectivity and CO2 permeability
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preparation and characterization of ag ion exchanged zeolite Matrimid 5218 mixed matrix membrane for co2 ch4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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Preparation and characterization of Ag+ ion-exchanged zeolite-Matrimid®5218 mixed matrix membrane for CO2/CH4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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improved co2 separation performance of Matrimid 5218 membrane by addition of low molecular weight polyethylene glycol
Greenhouse Gases-Science and Technology, 2015Co-Authors: Mahsa Loloei, Mohammadreza Omidkhah, Abdolreza Moghadassi, Abtin Ebadi AmooghinAbstract:Polyethylene glycols have received worldwide attention as a highly permeable CO2-philic polymer in carbon dioxide separation applications. In this study, we investigated the influence of a low molecular weight polyethylene glycol (PEG 200) on physicochemical, morphological, and gas separation properties of Matrimid®5218 as a novel polymer blend. Both symmetric and asymmetric Matrimid flat sheet membranes with 0–20 wt.% PEG were prepared via a dense film-casting method. The miscibility of blends at low PEG concentrations (3–5 wt.%) was confirmed by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Moreover, the blends were partially miscible at higher PEG concentrations (10–20 wt.%). Matrimid/PEG molecular interactions were further studied by FTIR and XRD analysis. SEM images indicated an impressive influence of PEG on the symmetric structure of Matrimid membrane. An asymmetric structure with a dense thin skin layer and a highly porous sub-layer was observed for the blends containing 10–20 wt.% PEG. The CO2 permeability and CO2/CH4 selectivity of the best-yield CO2-selective blend membrane (Matrimid/PEG (95:5)) incvreased about 25% (from 7.68 to 9.62 Barrer) and 15% (from 35 to 40) compared to pure Matrimid, respectively. Furthermore studying the plasticization pressures of the membranes revealed that the more PEG content in blend the less the plasticization pressure obtained. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd
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the effects of aminosilane grafting on nay zeolite Matrimid 5218 mixed matrix membranes for co2 ch4 separation
Journal of Membrane Science, 2015Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Ali KargariAbstract:s 5218 abstract The aminosilane grafting on micro-sized nanoporous sodium zeolite Y particles was performed and novel mixed matrix membranes (MMMs) were fabricated by embedding the modified particles into the Matrimid s 5218 matrix. The aminosilane grafting reaction was considered using 3-aminopropyl (diethoxy)methylsilane (APDEMS) as the silane coupling agent. DLS, BET, XRD, FTIR-ATR, CAM, SEM, and TG/DTG were investigated to characterize the pure zeolite (NaY), silane modified zeolite (Sm-NaY) and the fabricated MMMs. Moreover, the effects of filler content (0-20 wt%) on pure and mixed gas experiments, feed pressure (2-12 bar) and operating temperature (35-75 1C) on CO2/CH4 transport properties of Matrimid/Sm-NaY were surveyed. The obtained results revealed that at 15 wt% filler loading (the optimum condition), the CO2 permeability increased from 8.34 Barrer for Matrimid to 9.70 Barrer (about 16%). The related CO2/CH4 selectivity was considerably increased from 36.3 to 57.1 (about 57%). This superior performance at 15 wt% filler loading was related to the good dispersion of the silane modified NaY particles in the Matrimid matrix. The defect free polymer/filler interface was achieved by the aminosilanes grafted on the external surface of the zeolites.
Tai-shung Chung - One of the best experts on this subject based on the ideXlab platform.
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Miscible blends of carboxylated polymers of intrinsic microporosity (cPIM-1) and Matrimid
Polymer, 2015Co-Authors: Wai Fen Yong, Tai-shung ChungAbstract:Abstract Miscible blends of Matrimid and carboxylated polymers of intrinsic microporosity (cPIM-1) at the molecular level have been discovered. Their miscibility has been confirmed by polarized light microscopy (PLM), atomic force microscopy (AFM), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The existence of hydrogen bonding promotes compatibility between these two polymers. A good agreement between experimental and predicted data on gas permeability and selectivity is observed. The addition of cPIM-1 in Matrimid significantly enhances the plasticization pressure for all blended membranes. A small loading of 5–10 wt% of cPIM-1 in Matrimid improves the plasticization pressure from less than 10 atm–15 atm while a higher loading of cPIM-1 shifts the plasticization pressure to 20 atm.
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high performance pim 1 Matrimid hollow fiber membranes for co2 ch4 o2 n2 and co2 n2 separation
Journal of Membrane Science, 2013Co-Authors: Wai Fen Yong, Tai-shung Chung, Youchang Xiao, Yen Wah TongAbstract:Abstract Polymers of intrinsic microporosity (PIM-1) have received worldwide attention but most PIM-1 researches have been conducted on dense flat membranes. For the first time, we have fabricated PIM-1/Matrimid membranes in a useful form of hollow fibers with synergistic separation performance. The newly developed hollow fibers comprising 5–15 wt% of highly permeable PIM-1 not only possess much higher gas-pair selectivity than PIM-1 but also have much greater permeance than pure Matrimid fibers. Data from positron annihilation lifetime spectroscopy (PALS), field emission scanning electron microscopy (FESEM) and apparent dense layer thickness indicate that the blend membranes have an ultrathin dense layer thickness of less than 70 nm. PIM-1 and Matrimid are partially miscible. The effect of partial miscibility on dense selective layer was studied. Defect-free hollow fibers with gas pair selectivity more than 90% of the intrinsic value can be spun directly from dopes containing 5 wt% PIM-1 with proper spinning conditions, while post annealing and additional silicone rubber coating are needed for membranes containing 10 and 15 wt% PIM-1, respectively. Comparing to Matrimid, the CO2 permeance of as-spun fibers containing 5 and 10 wt% PIM-1 increases 78% and 146%, respectively (e.g., from original 86.3 GPU (1 GPU=1×10−6 cm3 (STP)/cm2 s cmHg=7.5005×10−12 m s−1 Pa−1) to 153.4 GPU and 212.4 GPU) without compromising CO2/CH4 selectivity. The CO2 permeance of the fiber containing 15 wt% PIM-1 improves to 243.2 GPU with a CO2/CH4 selectivity of 34.3 after silicon rubber coating. Under mixed gas tests of 50/50 CO2/CH4, this fiber shows a CO2 permeance of 188.9 GPU and a CO2/CH4 selectivity of 28.8. The same fiber also has an impressive O2 permeance of 3.5 folds higher than the pristine Matrimid (e.g., from original 16.9 GPU to 59.9 GPU) with an O2/N2 selectivity of 6.1. The newly developed membranes may have great potential to be used for natural gas purification, air separation and CO2 capture.
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High performance PIM-1/Matrimid hollow fiber membranes for CO2/CH4, O2/N2 and CO2/N2 separation
Journal of Membrane Science, 2013Co-Authors: Wai Fen Yong, Tai-shung Chung, Youchang Xiao, Yen Wah TongAbstract:Abstract Polymers of intrinsic microporosity (PIM-1) have received worldwide attention but most PIM-1 researches have been conducted on dense flat membranes. For the first time, we have fabricated PIM-1/Matrimid membranes in a useful form of hollow fibers with synergistic separation performance. The newly developed hollow fibers comprising 5–15 wt% of highly permeable PIM-1 not only possess much higher gas-pair selectivity than PIM-1 but also have much greater permeance than pure Matrimid fibers. Data from positron annihilation lifetime spectroscopy (PALS), field emission scanning electron microscopy (FESEM) and apparent dense layer thickness indicate that the blend membranes have an ultrathin dense layer thickness of less than 70 nm. PIM-1 and Matrimid are partially miscible. The effect of partial miscibility on dense selective layer was studied. Defect-free hollow fibers with gas pair selectivity more than 90% of the intrinsic value can be spun directly from dopes containing 5 wt% PIM-1 with proper spinning conditions, while post annealing and additional silicone rubber coating are needed for membranes containing 10 and 15 wt% PIM-1, respectively. Comparing to Matrimid, the CO2 permeance of as-spun fibers containing 5 and 10 wt% PIM-1 increases 78% and 146%, respectively (e.g., from original 86.3 GPU (1 GPU=1×10−6 cm3 (STP)/cm2 s cmHg=7.5005×10−12 m s−1 Pa−1) to 153.4 GPU and 212.4 GPU) without compromising CO2/CH4 selectivity. The CO2 permeance of the fiber containing 15 wt% PIM-1 improves to 243.2 GPU with a CO2/CH4 selectivity of 34.3 after silicon rubber coating. Under mixed gas tests of 50/50 CO2/CH4, this fiber shows a CO2 permeance of 188.9 GPU and a CO2/CH4 selectivity of 28.8. The same fiber also has an impressive O2 permeance of 3.5 folds higher than the pristine Matrimid (e.g., from original 16.9 GPU to 59.9 GPU) with an O2/N2 selectivity of 6.1. The newly developed membranes may have great potential to be used for natural gas purification, air separation and CO2 capture.
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molecular engineering of pim 1 Matrimid blend membranes for gas separation
Journal of Membrane Science, 2012Co-Authors: Wai Fen Yong, Youchang Xiao, Fu Yun Li, Pei Li, K P Pramoda, Yen Wah Tong, Tai-shung ChungAbstract:Abstract The polymers of intrinsic microporosity have gained the attention as one of the potential materials for membrane gas separation. The contorted ladder-like structure in polymers of intrinsic microporosity, specifically PIM-1 possesses high permeability but with moderate selectivity for O2/N2, CO2/N2 and CO2/CH4 separation. We report here the most convenient and time efficient strategy of tuning the permeability and selectivity by blending PIM-1 with different compositions of Matrimid. In this work, the physical properties, phase behavior and gas transport properties of PIM-1/Matrimid blends have been explored. The polarized light microscope (PLM) analyses evidence that most of the PIM-1/Matrimid blends reveal partially miscible behavior. The inclusion of PIM-1 in the Matrimid matrix results in a substantial increase in gas permeability and a slight decrease in selectivity. The additions of 5 and 10 wt% PIM-1 into Matrimid induce the permeability increments of 25% and 77%, respectively from the original 9.6 to 12 and 17 Barrer without compromising its CO2/CH4 selectivity. For O2/N2 separation, the incorporation of a small amount of Matrimid (e.g., 5–30 wt%) into PIM-1 promotes a fair increase in selectivity and drives the overall gas separation performance surpassing or close to the upper bound. At binary gas tests of CO2/CH4 (50%/50%), the 30 wt% PIM-1 in Matrimid membrane has a CO2 permeability of 50 Barrer and a CO2/CH4 selectivity of 31.
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facilitated transport by hybrid poss Matrimid zn2 nanocomposite membranes for the separation of natural gas
Journal of Membrane Science, 2010Co-Authors: Tai-shung Chung, Sibudjing KawiAbstract:Abstract Hybrid POSS® Octa Amic Acid–Matrimid® nanocomposite membranes have been successfully fabricated. The study shows that the nano-sized POSS® could be distributed uniformly over the Matrimid® matrix with an intimate polymer–particle interface. This is presumably ascribed to the existence of intermolecular hydrogen bonding between the carboxylic groups of POSS® and Matrimid®. The excellent dispersion of POSS® with eight carboxylic functional groups each moiety provides a high-density ionic binding platform for the introduction of Zn2+, which is the engine of the facilitated transport to some specific gases. The best gas separation performance is observed for the hybrid POSS®–Matrimid®–Zn2+ nanocomposite membrane (20 wt% POSS®–Matrimid®–0.3 M ZnCl2), in which, the selectivity of CO2/CH4 and O2/N2 increases by 70% and 30%, respectively, when compared with untreated nanocomposite membrane (20 wt% POSS®–Matrimid®).
Ali Kargari - One of the best experts on this subject based on the ideXlab platform.
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preparation and characterization of ag ion exchanged zeolite Matrimid 5218 mixed matrix membrane for co2 ch4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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Preparation and characterization of Ag+ ion-exchanged zeolite-Matrimid®5218 mixed matrix membrane for CO2/CH4 separation
Journal of Energy Chemistry, 2016Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Hamidreza Sanaeepur, Ali KargariAbstract:Abstract In this work, the zeolite-Y was ion-exchanged by introducing silver cations into the framework of micro-sized nano-porous sodium zeolite-Y using a liquid-phase ion exchanged method. The Ag+ ion-exchanged zeolite, was then embedded into the Matrimid®5218 matrix to form novel mixed matrix membranes (MMMs). The particles and MMMs were characterized by ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Furthermore, the effects of filler content (0–20 wt%) on pure and mixed gas experiments, feed pressure (2–20 bar) and operating temperature (35–75 oC) on CO2/CH4 transport properties of Matrimid/AgY MMMs were considered. Characterization results confirmed an appropriate ion-exchange treatment of the zeolites. The SEM results confirmed the superior interfacial adhesion between polymer and zeolites, particularly in the case of Matrimid/AgY membranes. This is due to the proper silverous zeolite/Matrimid functional groups’ interactions. The gas permeation results showed that the CO2 permeability increased about 123%, from 8.34 Barrer for pure Matrimid to 18.62 Barrer for Matrimid/AgY (15 wt%). The CO2/CH4 selectivity was improved about 66%, from 36.3 for Matrimid to 60.1 for Matrimid/AgY (15 wt%). The privileged gas separation performance of Matrimid/AgY (15 wt%) was the result of a combined effect of facilitated transport mechanism of Ag+ ions as well as the intrinsic surface diffusion mechanism of Y-type zeolite. In order to survey the possibility of using the developed MMMs in industry, the CO2-induced plasticization effect and mixed gas experiment were accomplished. It was deduced that the fabricated MMMs could maintain the superior performance in actual operating conditions.
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the effects of aminosilane grafting on nay zeolite Matrimid 5218 mixed matrix membranes for co2 ch4 separation
Journal of Membrane Science, 2015Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Ali KargariAbstract:s 5218 abstract The aminosilane grafting on micro-sized nanoporous sodium zeolite Y particles was performed and novel mixed matrix membranes (MMMs) were fabricated by embedding the modified particles into the Matrimid s 5218 matrix. The aminosilane grafting reaction was considered using 3-aminopropyl (diethoxy)methylsilane (APDEMS) as the silane coupling agent. DLS, BET, XRD, FTIR-ATR, CAM, SEM, and TG/DTG were investigated to characterize the pure zeolite (NaY), silane modified zeolite (Sm-NaY) and the fabricated MMMs. Moreover, the effects of filler content (0-20 wt%) on pure and mixed gas experiments, feed pressure (2-12 bar) and operating temperature (35-75 1C) on CO2/CH4 transport properties of Matrimid/Sm-NaY were surveyed. The obtained results revealed that at 15 wt% filler loading (the optimum condition), the CO2 permeability increased from 8.34 Barrer for Matrimid to 9.70 Barrer (about 16%). The related CO2/CH4 selectivity was considerably increased from 36.3 to 57.1 (about 57%). This superior performance at 15 wt% filler loading was related to the good dispersion of the silane modified NaY particles in the Matrimid matrix. The defect free polymer/filler interface was achieved by the aminosilanes grafted on the external surface of the zeolites.
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enhanced co2 transport properties of membranes by embedding nano porous zeolite particles into Matrimid 5218 matrix
RSC Advances, 2015Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Ali KargariAbstract:A novel mixed matrix membrane (MMM) was fabricated by incorporating micro-sized nano-porous sodium zeolite-Y (NaY zeolite) into Matrimid®5218 matrix. The filler and the prepared membranes were characterized by X-ray diffraction (XRD), Fourier transform infrared-attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and thermal gravimetric and derivative thermal gravimetric (TG/DTG) analyses. The effects of filler content (0–20 wt%), feed pressure (2–12 bar), operating temperature (35–75 °C) and mixed feed gas on CO2/CH4 transport properties of Matrimid/NaY were investigated. The results revealed that the Matrimid/NaY (15 wt%) displayed a CO2 permeability of 17.52 Barrer, more than two-fold increase with respect to the NaY-free counterpart. The corresponding CO2/CH4 selectivity was increased from 36.3 for Matrimid to 43.3 for Matrimid/NaY (15 wt%), (about 20%). The CO2 permselectivities of MMMs were greater than that of the Matrimid over the entire pressure range. As the operating temperature increased from 35 to 75 °C, CH4 permeability increased about 175% and 215% for Matrimid and Matrimid/NaY (15 wt%), respectively. While the CO2 permeability enhanced about 78% and 98%. The corresponding decreases in the CO2/CH4 selectivities were 35.27% and 37.14%, respectively. Moreover, the mixed gas experiment results indicated that CO2 permeability and CO2/CH4 selectivity for all membranes were lower than those of pure gas experiments, but with less severity for MMMs. The best CO2-selective membrane, Matrimid/NaY (15 wt%), represented the CO2 permeability of 15.19 Barrer with CO2/CH4 selectivity of 39.5 for a 10/90 vol% mixture of CO2 and CH4.
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Enhanced CO2 transport properties of membranes by embedding nano-porous zeolite particles into Matrimid®5218 matrix
RSC Advances, 2015Co-Authors: Abtin Ebadi Amooghin, Mohammadreza Omidkhah, Ali KargariAbstract:A novel mixed matrix membrane (MMM) was fabricated by incorporating micro-sized nano-porous sodium zeolite-Y (NaY zeolite) into Matrimid®5218 matrix. The filler and the prepared membranes were characterized by X-ray diffraction (XRD), Fourier transform infrared-attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and thermal gravimetric and derivative thermal gravimetric (TG/DTG) analyses. The effects of filler content (0–20 wt%), feed pressure (2–12 bar), operating temperature (35–75 °C) and mixed feed gas on CO2/CH4 transport properties of Matrimid/NaY were investigated. The results revealed that the Matrimid/NaY (15 wt%) displayed a CO2 permeability of 17.52 Barrer, more than two-fold increase with respect to the NaY-free counterpart. The corresponding CO2/CH4 selectivity was increased from 36.3 for Matrimid to 43.3 for Matrimid/NaY (15 wt%), (about 20%). The CO2 permselectivities of MMMs were greater than that of the Matrimid over the entire pressure range. As the operating temperature increased from 35 to 75 °C, CH4 permeability increased about 175% and 215% for Matrimid and Matrimid/NaY (15 wt%), respectively. While the CO2 permeability enhanced about 78% and 98%. The corresponding decreases in the CO2/CH4 selectivities were 35.27% and 37.14%, respectively. Moreover, the mixed gas experiment results indicated that CO2 permeability and CO2/CH4 selectivity for all membranes were lower than those of pure gas experiments, but with less severity for MMMs. The best CO2-selective membrane, Matrimid/NaY (15 wt%), represented the CO2 permeability of 15.19 Barrer with CO2/CH4 selectivity of 39.5 for a 10/90 vol% mixture of CO2 and CH4.
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mixed matrix membranes of zeolitic imidazolate framework zif 8 Matrimid nanocomposite thermo mechanical stability and viscoelasticity underpinning membrane separation performance
Journal of Membrane Science, 2016Co-Authors: E M Mahdi, Jinchong TanAbstract:Abstract Mixed-matrix membranes (MMMs) containing nanoporous metal-organic frameworks (MOFs) represent a rapidly expanding class of next-generation membranes, targeting CO2 capture, gas purification, and novel electrochemical technologies. In this work, we have performed an in-depth study to elucidate the basic mechanical properties underpinning the functional performance of the prototypical ZIF-8/Matrimid® nanocomposite membranes. By adopting the colloidal solution mixing method, we have fabricated membranes with 0–30 wt% ZIF-8 nanoparticles, whose quasi-static, temperature- and time-dependent mechanical characteristics have been established by means of nanoindentation, dynamic mechanical analysis, and large-strain uniaxial tensile measurements. We show that the inclusion of ZIF-8 nanoparticles into Matrimid (a glassy polyimide) controls many important mechanical behaviour, ranging from elastic modulus, yield strength and hardness, to ductility (stretchability), fracture strength and toughness. We identified that annealing (180 °C), despite improving the gas permeability and selectivity of Matrimid-based membranes, could substantially degrade its ductility and fracture toughness, while stabilising small-strain viscoelastic response under dynamic loading. Our results suggest that an annealed
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Mixed-matrix membranes of zeolitic imidazolate framework (ZIF-8)/Matrimid nanocomposite: Thermo-mechanical stability and viscoelasticity underpinning membrane separation performance
Journal of Membrane Science, 2016Co-Authors: E M Mahdi, Jinchong TanAbstract:Abstract Mixed-matrix membranes (MMMs) containing nanoporous metal-organic frameworks (MOFs) represent a rapidly expanding class of next-generation membranes, targeting CO2 capture, gas purification, and novel electrochemical technologies. In this work, we have performed an in-depth study to elucidate the basic mechanical properties underpinning the functional performance of the prototypical ZIF-8/Matrimid® nanocomposite membranes. By adopting the colloidal solution mixing method, we have fabricated membranes with 0–30 wt% ZIF-8 nanoparticles, whose quasi-static, temperature- and time-dependent mechanical characteristics have been established by means of nanoindentation, dynamic mechanical analysis, and large-strain uniaxial tensile measurements. We show that the inclusion of ZIF-8 nanoparticles into Matrimid (a glassy polyimide) controls many important mechanical behaviour, ranging from elastic modulus, yield strength and hardness, to ductility (stretchability), fracture strength and toughness. We identified that annealing (180 °C), despite improving the gas permeability and selectivity of Matrimid-based membranes, could substantially degrade its ductility and fracture toughness, while stabilising small-strain viscoelastic response under dynamic loading. Our results suggest that an annealed