Mixed and single gas permeation performance analysis of amino-modified ZIF based mixed matrix membrane

Dense and translucent CA/PEG 1000/ZIF membranes were synthesized in acetone, utilizing solution casting. Membrane characterization was carried out using FT-IR, SEM and tensile testing. SEM proved presence of dense membranes and increase in the filler amount may have formed voids, raising the permeability of both gases. Single and mixed gas (CO2/CH4) permeation testing showed an increased permeability, on addition of more filler, which is probably due to formation of nano-gaps. A maximum selectivity of 39.49 and 34.86 for single and mixed gases respectively, and maximum permeabilities of 49.7685 and 1.41 barrers were observed. Tensile testing showed that strength peaked then decreased on increased loading, due to agglomeration on adding more ZIF, which introduced defects in structure. To conclude, selectivity of higher loaded membranes is favourable whereas tensile strength of lower loaded membrane is superior, but we have a trade-off between selectivity and tensile strength, so a higher-loaded membrane is most suitable. [Formula: see text]

Download Full-text

Preparation and Characterization of Mixed Matrix Membrane based on Polysulfone (PSF) and Lanthanum Orthoferrite (LaFeO3) for Gas Separation

Journal of Applied Membrane Science & Technology ◽

10.11113/amst.v24n1.169 ◽

2020 ◽

Vol 24 (1) ◽

Author(s):

N. S. Fadaly ◽

Farhana Aziz

Keyword(s):

Gas Permeation ◽

Mixed Matrix Membrane ◽

Gravimetric Analysis ◽

High Permeability ◽

Mixed Matrix ◽

Feed Pressure ◽

Ft Ir ◽

Set Up ◽

Permeation Test

The aim of this study is to investigate the effects of polysulfone (PSF) and lanthanum orthoferrite (LaFeO3) incorporated mixed matrix membrane (MMM) on gas permeation and selectivity properties. PSF/LaFeO3 MMMs were prepared with various weights loading of LaFeO3. The membranes obtained were characterized using scanning electron microscope (SEM), thermal gravimetric analysis (TGA) and Fourier-transform infra-red (FT-IR). The gas transport properties of MMM were measured using single gas permeation set up (CO2, CH4, O2 and N2) at ambient temperature, and feed pressure of 2, 4 and 6 bar. The permeation test showed that the mixed matrix membrane exhibited high permeability. With increasing LaFeO3 weight loading to 1.0%, the highest permeability values were 47.74 GPU for CO2, 29.85 GPU for CH4, 57.56 GPU for O2, and 40.66 GPU for N2. The results also showed that by incorporating 1.0wt% of LaFeO3 into PSF matrix, the highest CO2/CH4 and O2/N2 selectivity of 1.60 and 1.42 respectively were obtained. Overall, all the resultants MMM showed higher permeability and selectivity compared to pure PSF membrane.

Download Full-text

A Molecular Simulation Study of Silica/Polysulfone Mixed Matrix Membrane for Mixed Gas Separation

Polymers ◽

10.3390/polym13132199 ◽

2021 ◽

Vol 13 (13) ◽

pp. 2199

Author(s):

Khadija Asif ◽

Serene Sow Mun Lock ◽

Syed Ali Ammar Taqvi ◽

Norwahyu Jusoh ◽

Chung Loong Yiin ◽

...

Keyword(s):

Transport Properties ◽

Molecular Simulation ◽

Gas Separation ◽

Membrane Separation ◽

Gas Transport ◽

Mixed Matrix ◽

Mixed Gas ◽

Gas Transport Properties ◽

Simulation Results ◽

Mixed Gases

Polysulfone-based mixed matrix membranes (MMMs) incorporated with silica nanoparticles are a new generation material under ongoing research and development for gas separation. However, the attributes of a better-performing MMM cannot be precisely studied under experimental conditions. Thus, it requires an atomistic scale study to elucidate the separation performance of silica/polysulfone MMMs. As most of the research work and empirical models for gas transport properties have been limited to pure gas, a computational framework for molecular simulation is required to study the mixed gas transport properties in silica/polysulfone MMMs to reflect real membrane separation. In this work, Monte Carlo (MC) and molecular dynamics (MD) simulations were employed to study the solubility and diffusivity of CO2/CH4 with varying gas concentrations (i.e., 30% CO2/CH4, 50% CO2/CH4, and 70% CO2/CH4) and silica content (i.e., 15–30 wt.%). The accuracy of the simulated structures was validated with published literature, followed by the study of the gas transport properties at 308.15 K and 1 atm. Simulation results concluded an increase in the free volume with an increasing weight percentage of silica. It was also found that pure gas consistently exhibited higher gas transport properties when compared to mixed gas conditions. The results also showed a competitive gas transport performance for mixed gases, which is more apparent when CO2 increases. In this context, an increment in the permeation was observed for mixed gas with increasing gas concentrations (i.e., 70% CO2/CH4 > 50% CO2/CH4 > 30% CO2/CH4). The diffusivity, solubility, and permeability of the mixed gases were consistently increasing until 25 wt.%, followed by a decrease for 30 wt.% of silica. An empirical model based on a parallel resistance approach was developed by incorporating mathematical formulations for solubility and permeability. The model results were compared with simulation results to quantify the effect of mixed gas transport, which showed an 18% and 15% percentage error for the permeability and solubility, respectively, in comparison to the simulation data. This study provides a basis for future understanding of MMMs using molecular simulations and modeling techniques for mixed gas conditions that demonstrate real membrane separation.

Download Full-text

P84/Zeolite-Carbon Composite Mixed Matrix Membrane for CO2/CH4 Separation

Indonesian Journal of Chemistry ◽

10.22146/ijc.35727 ◽

2019 ◽

Vol 19 (3) ◽

pp. 650 ◽

Cited By ~ 1

Author(s):

Triyanda Gunawan ◽

Retno Puji Rahayu ◽

Rika Wijiyanti ◽

Wan Norharyati Wan Salleh ◽

Nurul Widiastuti

Keyword(s):

Carbon Composite ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Inversion Method ◽

Mixed Matrix ◽

Force Microscopy ◽

Membrane Performance ◽

Polyimide Membrane ◽

Phase Inversion Method

Mixed Matrix Membranes (MMMs) which consist of 0.3 wt.% Zeolite-Carbon Composite (ZCC) dispersed in BTDA-TDI/MDI (P84 co-polyimide) have been prepared through phase inversion method by using N-methyl-2-pyrrolidone (NMP) as a solvent. Membranes were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Thermogravimetric Analysis (TGA), and Fourier Transform Infrared (FTIR). Membrane performance was measured by a single gas permeation of CO2 and CH4. The maximum permeability of CO2 and CH4, which up to 12.67 and 6.03 Barrer, respectively. P84/ZCC mixed matrix membrane also showed a great enhancement in ideal selectivity of CO2/CH4 2.10 compared to the pure P84 co-polyimide membrane.

Download Full-text

Gas Permeation Properties of Multiwalled Carbon Nanotubes on Polyether Block Amide (Pebax-1657)/Polyethersulfone(PES) Blend Mixed Matrix Membrane for CO2/CH4 Separation

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.307.258 ◽

2020 ◽

Vol 307 ◽

pp. 258-263

Author(s):

Nabilah Fazil ◽

Hilmi Mukhtar ◽

Dzeti Farhah Mohshim ◽

Rizwan Nasir

Keyword(s):

Carbon Nanotubes ◽

Gas Permeability ◽

Gas Permeation ◽

Superior Performance ◽

Polymeric Membrane ◽

Mixed Matrix Membrane ◽

Inversion Method ◽

Separation Performance ◽

Mixed Matrix ◽

Multiwalled Carbon

Mixed matrix membrane (MMM), a developing research area, is a membrane formed by incorporating fillers in the polymeric membrane to enhance gas separation performance. In this study, MMMs comprised of blend rubbery block copolymers of polyether block amide (Pebax-1657) with a glassy polyethersulfone (PES) polymer and multi-walled carbon nanotubes (MWCNTs) were synthesized by dry phase inversion method and explored further by gas permeability test. Pebax-1657/PES/MWCNTs membrane resulted in an increased permeability as well as CO2/CH4 selectivity. The Pebax-1657/PES polymer blend MMM with 10wt% of MWCNTs has shown the most superior performance of CO2 permeability, CH4 permeability and CO2/CH4 selectivity in comparison with the pure Pebax-1657 resulted in 66.3% and 11.6% difference respectively.

Download Full-text

Evaluation of the Properties, Gas Permeability, and Selectivity of Mixed Matrix Membrane Based on Polysulfone Polymer Matrix Incorporated with KIT-6 Silica

Polymers ◽

10.3390/polym11111732 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1732 ◽

Cited By ~ 2

Author(s):

Sie Hao Ding ◽

Tiffany Yit Siew Ng ◽

Thiam Leng Chew ◽

Pei Ching Oh ◽

Abdul Latif Ahmad ◽

...

Keyword(s):

Carbon Dioxide ◽

Polymer Matrix ◽

Pressure Difference ◽

Gas Permeability ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Carbon Dioxide Co2 ◽

The Ideal

Mixed matrix membranes (MMMs) separation is a promising technology for gas permeation and separation involving carbon dioxide (CO2). However, finding a suitable type of filler for the formation of defect-free MMMs with enhancement in gas permeability remains a challenge. Current study focuses on synthesis of KIT-6 silica and followed by the incorporation of KIT-6 silica as filler into polysulfone (PSF) polymer matrix to fabricate MMMs, with filler loadings of 0–8 wt %. The effect of KIT-6 incorporation on the properties of the fabricated MMMs was evaluated via different characterization techniques. The MMMs were investigated for gas permeability and selectivity with pressure difference of 5 bar at 25 °C. KIT-6 with typical rock-like morphology was synthesized. Incorporation of 2 wt % of KIT-6 into PSF matrix produced MMMs with no void. When KIT-6 loadings in the MMMs were increased from 0 to 2 wt %, the CO2 permeability increased by ~48%, whereas the ideal CO2/CH4 selectivity remained almost constant. However, when the KIT-6 loading in PSF polymer matrix was more than 2 wt %, the formation of voids in the MMMs increased the CO2 permeability but sacrificed the ideal CO2/CH4 selectivity. In current study, KIT-6 was found to be potential filler for PSF matrix under controlled KIT-6 loading for gas permeation.

Download Full-text

Development of Polysulfone/Activated Carbon Nanofibers Mixed Matrix Membrane for CO2/CH4 Separation

Journal of Applied Membrane Science & Technology ◽

10.11113/amst.v22n1.114 ◽

2018 ◽

Vol 22 (1) ◽

Author(s):

Z. Jamian ◽

M. H. Tajuddin ◽

N. Yusof ◽

F. E. Che Othman

Keyword(s):

Activated Carbon ◽

Carbon Nanofiber ◽

Sem Analysis ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Separation Performance ◽

Mixed Matrix ◽

Weight Percentage ◽

Ft Ir ◽

Matrix Membranes

This study was performed primarily to investigate the effect of activated carbon nanofiber (ACNF) on carbon dioxide and methane separation performance of mixed matrix membrane (MMM). In this study, polysulfone (PSf)/ACNF mixed matrix membranes was fabricated using dry/wet inversion technique. The effect of PSf concentration and ACNF loading on the performance of mixed matrix membrane in terms of permeability and selectivity of CO2/CH4 gas separation was observed. The fabricated flat sheet mixed matrix membranes were characterized using Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM) analysis. From the SEM observations, it shows that sponge like structures images were observed upon the addition of ACNFs in the PSf/ACNF membranes was slowly decreased due to increasing weight percentage of ACNF. FT-IR result indicating the presence of carboxyl group in MMM at wavelength 1750 cm-1. Meanwhile, the MMMs were further tested to pure permeation test using pure CO2 and CH4 gas, the CO2 permeance improved and the selectivity of CO2/CH4 increased after the addition of ACNFs.

Download Full-text

Gas Transport in Mixed Matrix Membranes: Two Methods for Time Lag Determination

Computation ◽

10.3390/computation8020028 ◽

2020 ◽

Vol 8 (2) ◽

pp. 28 ◽

Cited By ~ 3

Author(s):

Alessio Fuoco ◽

Marcello Monteleone ◽

Elisa Esposito ◽

Rosaria Bruno ◽

Jesús Ferrando-Soria ◽

...

Keyword(s):

Transport Properties ◽

Gas Transport ◽

Time Lag ◽

Effective Diffusion ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix ◽

Mixed Gas ◽

Fitting Procedure ◽

Matrix Membranes

The most widely used method to measure the transport properties of dense polymeric membranes is the time lag method in a constant volume/pressure increase instrument. Although simple and quick, this method provides only relatively superficial, averaged data of the permeability, diffusivity, and solubility of gas or vapor species in the membrane. The present manuscript discusses a more sophisticated computational method to determine the transport properties on the basis of a fit of the entire permeation curve, including the transient period. The traditional tangent method and the fitting procedure were compared for the transport of six light gases (H2, He, O2, N2, CH4, and CO2) and ethane and ethylene in mixed matrix membranes (MMM) based on Pebax®1657 and the metal–organic framework (MOF) CuII2(S,S)-hismox·5H2O. Deviations of the experimental data from the theoretical curve could be attributed to the particular MOF structure, with cavities of different sizes. The fitting procedure revealed two different effective diffusion coefficients for the same gas in the case of methane and ethylene, due to the unusual void morphology in the MOFs. The method was furthermore applied to mixed gas permeation in an innovative constant-pressure/variable-volume setup with continuous analysis of the permeate composition by an on-line mass-spectrometric residual gas analyzer. This method can provide the diffusion coefficient of individual gas species in a mixture, during mixed gas permeation experiments. Such information was previously inaccessible, and it will greatly enhance insight into the mixed gas transport in polymeric or mixed matrix membranes.

Download Full-text

Gas permeation and sorption properties of poly(amide-12-b-ethyleneoxide)(Pebax1074)/SAPO-34 mixed matrix membrane for CO2/CH4 and CO2/N2 separation

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2014.12.039 ◽

2015 ◽

Vol 27 ◽

pp. 223-239 ◽

Cited By ~ 74

Author(s):

Hesamoddin Rabiee ◽

Shadi Meshkat Alsadat ◽

Mohammad Soltanieh ◽

Seyyed Abbas Mousavi ◽

Ali Ghadimi

Keyword(s):

Gas Permeation ◽

Sorption Properties ◽

Mixed Matrix Membrane ◽

Mixed Matrix

Download Full-text

ZEOLITIC IMIDAZOLE FRAMEWORK 8 DECORATED GRAPHENE OXIDE (ZIF-8/GO) MIXED MATRIX MEMBRANE (MMM) FOR CO2/CH4 SEPARATION

Jurnal Teknologi ◽

10.11113/jt.v79.10438 ◽

2017 ◽

Vol 79 (1-2) ◽

Cited By ~ 1

Author(s):

Nik Abdul Hadi Md Nordin ◽

Ahmad Fauzi Ismail ◽

Noorhana Yahya

Keyword(s):

Graphene Oxide ◽

Room Temperature ◽

Metal Organic Framework ◽

Gas Permeation ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Temperature Method ◽

Metal Organic ◽

Pore Properties

Recently, metal-organic framework composited with graphene oxide (MOF/GO) has been explored and has shown superior properties compared to both of the parent materials. Thus, this study aims to utilize zeolitic imidazole framework 8 (ZIF-8), a subclass of MOF, decorated graphene oxide (ZIF-8/GO) as filler in mixed matrix membrane (MMM) for CO2 separation. ZIF-8/GO has been successfully synthesized using aqueous room temperature method. Distortion of ZIF-8 structure after GO incorporate was observed from TEM and decreasing pore properties, while their crystal structure are intact. The role of the composite on gas permeation is also evaluated using pure N2, CH4 and CO2. The presence of ZIF-8/GO into membrane has increase CO2 permeance from 59.03 ± 13.87 GPU to 79.92 ± 18.26 GPU with insignificant changes in the gas pair selectivities even only 0.5wt% (total solids) of ZIF-8/GO incorporated.

Download Full-text

A Novel Composite Material UiO-66@HNT/Pebax Mixed Matrix Membranes for Enhanced CO2/N2 Separation

Membranes ◽

10.3390/membranes11090693 ◽

2021 ◽

Vol 11 (9) ◽

pp. 693

Author(s):

Fei Guo ◽

Bingzhang Li ◽

Rui Ding ◽

Dongsheng Li ◽

Xiaobin Jiang ◽

...

Keyword(s):

Composite Material ◽

Gas Separation ◽

Halloysite Nanotubes ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Separation Performance ◽

Mixed Matrix ◽

Transport Pathways ◽

Gas Separation Performance

Mixing a polymer matrix and nanofiller to prepare a mixed matrix membrane (MMM) is an effective method for enhancing gas separation performance. In this work, a unique UiO-66-decorated halloysite nanotubes composite material (UiO-66@HNT) was successfully synthesized via a solvothermal method and dispersed into the Pebax-1657 matrix to prepare MMMs for CO2/N2 separation. A remarkable characteristic of this MMM was that the HNT lumen provided the highway for CO2 diffusion due to the unique affinity of UiO-66 for CO2. Simultaneously, the close connection of the UiO-66 layer on the external surface of HNTs created relatively continuous pathways for gas permeation. A suite of microscopy, diffraction, and thermal techniques was used to characterize the morphology and structure of UiO-66@HNT and the membranes. As expected, the embedding UiO-66@HNT composite materials significantly improved the separation performances of the membranes. Impressively, the as-obtained membrane acquired a high CO2 permeability of 119.08 Barrer and CO2/N2 selectivity of 76.26. Additionally, the presence of UiO-66@HNT conferred good long-term stability and excellent interfacial compatibility on the MMMs. The results demonstrated that the composite filler with fast transport pathways designed in this study was an effective strategy to enhance gas separation performance of MMMs, verifying its application potential in the gas purification industry.

Download Full-text