Predicting Gas Permeability through Mixed-matrix Membranes Filled with Nanofillers of Different Shapes

2021 ◽  
Author(s):  
Muhammad Sarfraz ◽  
Aqash Arshad ◽  
M. Ba-Shammakh
Keyword(s):  
Gas Permeability ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Different Shapes ◽  
Matrix Membranes

Effect of new metal–organic framework (zeolitic imidazolate framework [ZIF-12]) in mixed matrix membranes on structure, morphology, and gas separation properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mehtap Safak Boroglu ◽  
Ismail Boz ◽  
Busra Kaya
Keyword(s):  
Gas Separation ◽  
Gas Permeability ◽  
Metal Organic Framework ◽  
Thermomechanical Analysis ◽  
Variable Pressure ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Sem Images ◽  
Zeolitic Imidazolate Framework ◽  
Matrix Membranes

Abstract In our study, the synthesis of zeolitic imidazolate framework (ZIF-12) crystals and the preparation of mixed matrix membranes (MMMs) with various ZIF-12 loadings were targeted. The characterization of ZIF-12 and MMMs were carried out by Fourier transform infrared spectroscopy analysis, thermogravimetric analysis, scanning electron microscopy (SEM), and thermomechanical analysis. The performance of MMMs was measured by the ability of binary gas separation. Commercial polyetherimide (PEI-Ultem® 1000) polymer was used as the polymer matrix. The solution casting method was utilized to obtain dense MMMs. In the SEM images of ZIF-12 particles, the particles with a rhombic dodecahedron structure were identified. From SEM images, it was observed that the distribution of ZIF-12 particles in the MMMs was homogeneous and no agglomeration was present. Gas permeability experiments of MMMs were measured for H2, CO2, and CH4 gases at steady state, at 4 bar and 35 °C by constant volume-variable pressure method. PEI/ZIF-12-30 wt% MMM exhibited high permeability and ideal selectivity values for H2/CH4 and CO2/CH4 were P H 2 / CH 4 = 331.41 ${P}_{{\text{H}}_{2}/{\text{CH}}_{4}}=331.41$ and P CO 2 / CH 4 = 53.75 ${P}_{{\text{CO}}_{2}/{\text{CH}}_{4}}=53.75$ gas pair.

scholarly journals A Review on Computational Modeling Tools for MOF-Based Mixed Matrix Membranes

Computation ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 36 ◽  
Author(s):  
Keskin ◽  
Alsoy Altinkaya
Keyword(s):  
Computational Modeling ◽  
Gas Permeability ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Great Promise ◽  
Mixed Matrix ◽  
Modeling Tools ◽  
Trade Off ◽  
Membrane Materials ◽  
Matrix Membranes

Computational modeling of membrane materials is a rapidly growing field to investigate the properties of membrane materials beyond the limits of experimental techniques and to complement the experimental membrane studies by providing insights at the atomic-level. In this study, we first reviewed the fundamental approaches employed to describe the gas permeability/selectivity trade-off of polymer membranes and then addressed the great promise of mixed matrix membranes (MMMs) to overcome this trade-off. We then reviewed the current approaches for predicting the gas permeation through MMMs and specifically focused on MMMs composed of metal organic frameworks (MOFs). Computational tools such as atomically-detailed molecular simulations that can predict the gas separation performances of MOF-based MMMs prior to experimental investigation have been reviewed and the new computational methods that can provide information about the compatibility between the MOF and the polymer of the MMM have been discussed. We finally addressed the opportunities and challenges of using computational studies to analyze the barriers that must be overcome to advance the application of MOF-based membranes.

scholarly journals Post-synthetic Ti Exchanged UiO-66 Metal-Organic Frameworks that Deliver Exceptional Gas Permeability in Mixed Matrix Membranes

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Stefan J. D. Smith ◽  
Bradley P. Ladewig ◽  
Anita J. Hill ◽  
Cher Hon Lau ◽  
Matthew R. Hill
Keyword(s):  
Gas Permeability ◽  
Metal Organic Frameworks ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Matrix Membranes

scholarly journals Mixed Matrix Membranes Based on Torlon® and ZIF-8 for High-Temperature, Size-Selective Gas Separations

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 982
Author(s):  
Matilde De Pascale ◽  
Francesco Maria Benedetti ◽  
Elsa Lasseuguette ◽  
Maria-Chiara Ferrari ◽  
Kseniya Papchenko ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Permeability ◽  
Filler Loading ◽  
Glassy Polymers ◽  
Gas Separations ◽  
Mixed Matrix Membranes ◽  
Size Selectivity ◽  
Mixed Matrix ◽  
Polymer Filler ◽  
Matrix Membranes

Torlon® is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced He/CO2 and H2/CO2 separations, by compounding Torlon® with a highly permeable filler, ZIF-8, to fabricate Mixed Matrix Membranes (MMMs). The effect of filler loading, gas size, and temperature on the MMMs permeability, diffusivity, and selectivity was investigated. The He permeability increased by a factor of 3, while the He/CO2 selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to Torlon®; similar trends were observed for the case of H2. The MMMs permeability and size-selectivity were both enhanced by temperature. The behavior of MMMs is intermediate between the pure polymer and pure filler ones, and can be described with models for composites, indicating that such materials have a good polymer/filler adhesion and their performance could be tailored by acting on the formulation. The behavior observed is in line with previous investigations on MMMs based on glassy polymers and ZIF-8, in similar conditions, and indicates that ZIF-8 can be used as a polymer additive when the permeability is a controlling aspect, with a proper choice of loading and operative temperature.

scholarly journals Gas Permeability of PVTMS/CNT Mixed Matrix Membranes

2015 ◽  
Vol 72 ◽  
pp. 166-170 ◽  
Author(s):  
D. Bakhtin ◽  
Yu.S. Eremin ◽  
A.M. Grekhov ◽  
V.V. Volkov
Keyword(s):  
Gas Permeability ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

High gas permeability of nanoZIF-8/polymer-based mixed matrix membranes intended for biogas purification

2020 ◽  
Vol 40 (6) ◽  
pp. 459-467 ◽  
Author(s):  
Putu Doddy Sutrisna ◽  
Emma Savitri
Keyword(s):  
Gas Permeability ◽  
Inorganic Materials ◽  
Mixed Matrix Membranes ◽  
Purification Process ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Membrane Performance ◽  
Biogas Purification ◽  
Separation Performances ◽  
Matrix Membranes

AbstractThe production of biomethane from the biogas purification process depends on the capacity of the separation technique employed to separate methane from carbon dioxide. Mixed matrix membranes (MMMs) combine the benefits of polymeric and inorganic materials, and it is believed that the trade-off between gas permeability and selectivity in polymeric membranes can be hampered by MMMs. Until recently, the development of MMMs for the biogas purification process has been constrained in lab scales. To be applied in large scales, the increase in gas permeability as well as the membrane performance under the influence of CO2 plasticization needs to be investigated. This paper reports the evaluation of gas permeability and CO2/CH4 gas separation performances of nano zeolitic imidazolate framework (ZIF)-8/Pebax-1657 to be used for biogas purification processes. In addition, the study on the CO2 plasticization behavior of MMMs fabricated with co-polymer Pebax was investigated. The incorporation of nanoZIF-8 particles inhibited the increase of CO2 permeability due to the reduced polymer flexibility. In addition, the diffusional selectivity of ZIF-8 improves the permeation behavior of both gases through MMMs. With nanoZIF-8/Pebax-1657 MMMs, the incorporation of particles improves the gas permeability with a slight decrease in gas selectivity, indicating a potentiality of the membranes used for biogas purification processes.

scholarly journals Computational Screening of MOF-Based Mixed Matrix Membranes for CO2/N2Separations

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Zeynep Sumer ◽  
Seda Keskin
Keyword(s):  
Upper Bound ◽  
Gas Permeability ◽  
Metal Organic Framework ◽  
Polymer Membranes ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Separation Potential ◽  
Computational Screening ◽  
Metal Organic ◽  
Matrix Membranes

Atomically detailed simulations were used to examine CO2/N2separation potential of metal organic framework- (MOF-) based mixed matrix membranes (MMMs) in this study. Gas permeability and selectivity of 700 new MMMs composed of 70 different MOFs and 10 different polymers were calculated for CO2/N2separation. This is the largest number of MOF-based MMMs for which computational screening is done to date. Selecting the appropriate MOFs as filler particles in polymers resulted in MMMs that have higher CO2/N2selectivities and higher CO2permeabilities compared to pure polymer membranes. We showed that, for polymers that have low CO2permeabilities but high CO2selectivities, the identity of the MOF used as filler is not important. All MOFs enhanced the CO2permeabilities of this type of polymers without changing their selectivities. Several MOF-based MMMs were identified to exceed the upper bound established for polymers. The methods we introduced in this study will create many opportunities to select the MOF/polymer combinations with useful properties for CO2separation applications.

Magnetic mixed matrix membranes in air separation

2014 ◽  
Vol 68 (10) ◽  
Author(s):  
Aleksandra Rybak ◽  
Gabriela Dudek ◽  
Monika Krasowska ◽  
Anna Strzelewicz ◽  
Zbigniew Grzywna ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
Gas Permeability ◽  
Transport Coefficients ◽  
Time Lag ◽  
Filler Loading ◽  
Air Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Pressure System ◽  
Matrix Membranes

AbstractEthylcellulose (EC) or linear polyimide (LPI) and magnetic neodymium powder particles MQP-14-12 were used for the preparation of inorganic-organic hybrid membranes. For all the membranes, N2, O2 and air permeability were examined. Mass transport coefficients were determined using the Time Lag System based on dynamic experiments in a constant pressure system. The results showed that the membrane permeation properties were improved by the addition of magnetic neodymium particles to the polymer matrix. The magnetic ethylcellulose and polyimide membranes exhibited higher gas permeability and diffusivity, while their permeability selectivity and solubility were either unchanged or slightly increased. Polyimide mixed matrix membranes were characterised by a higher thermal and mechanical stability, larger filler loading, better magnetic properties and reasonable selectivity in the air separation.

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