Atomistic Simulation Study of Polyarylate/Zeolitic-Imidazolate Framework Mixed-Matrix Membranes for Water Desalination

2020 ◽  
Vol 3 (10) ◽  
pp. 10022-10031
Author(s):  
Wan Wei ◽  
Jie Liu ◽  
Jianwen Jiang
Keyword(s):  
Simulation Study ◽  
Atomistic Simulation ◽  
Water Desalination ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
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 CO2 Selective, Zeolitic Imidazolate Framework-7 Based Polymer Composite Mixed-Matrix Membranes

2018 ◽  
Vol 7 (3) ◽  
pp. 1 ◽  
Author(s):  
Tina Chakrabarty ◽  
Pradeep Neelakanda ◽  
Klaus-Viktor Peinemann
Keyword(s):  
Metal Organic Framework ◽  
Time Lag ◽  
Morphological Characterization ◽  
Mixed Matrix Membranes ◽  
Co2 Removal ◽  
Hybrid Membranes ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Custom Made ◽  
Matrix Membranes

CO2 removal is necessary to mitigate the effects of global warming but it is a challenging process to separate CO2 from natural gas, biogas, and other gas streams. Development of hybrid membranes by use of polymers and metal-organic framework (MOF) particles is a viable option to overcome this challenge. A ZIF-7 nano-filler that was synthesized in our lab was embedded into a designed polymer matrix at various loadings and the performance of the mixed matrix membranes was evaluated in terms of gas permeance and selectivity. Hybrid membranes with various loadings (20, 30 and 40 wt%) were developed and tested at room temperature by a custom made time lag equipment and a jump in selectivity was observed when compared with the pristine polymer. A commercially attractive region for the selectivity CO2 over CH4 was achieved with a selectivity of 39 for 40 wt% particle loading. An increase in selectivity was observed with the increase of ZIF-7 loadings. Best performance was seen at 40% ZIF-7 loaded membrane with an ideal selectivity of 39 for CO2 over CH4. The obtained selectivity was 105% higher for CO2 over CH4 than the selectivity of the pristine polymer with a slight decrease in permeance. Morphological characterization of such developed membranes showed an excellent compatibility between the polymer and particle adhesion.

scholarly journals Magnetically Aligned and Enriched Pathways of Zeolitic Imidazolate Framework 8 in Matrimid Mixed Matrix Membranes for Enhanced CO2 Permeability

Membranes ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 155 ◽  
Author(s):  
Machiel van Essen ◽  
Esther Montrée ◽  
Menno Houben ◽  
Zandrie Borneman ◽  
Kitty Nijmeijer
Keyword(s):  
Design Parameters ◽  
Mixed Matrix Membranes ◽  
Co2 Uptake ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Weight Content ◽  
The Matrix ◽  
Metal Organic ◽  
Magnetically Aligned ◽  
Matrix Membranes

Metal-organic frameworks (MOFs) as additives in mixed matrix membranes (MMMs) for gas separation have gained significant attention over the past decades. Many design parameters have been investigated for MOF based MMMs, but the spatial distribution of the MOF throughout MMMs lacks investigation. Therefore, magnetically aligned and enriched pathways of zeolitic imidazolate framework 8 (ZIF−8) in Matrimid MMMs were synthesized and investigated by means of their N2 and CO2 permeability. Magnetic ZIF−8 (m–ZIF−8) was synthesized by incorporating Fe3O4 in the ZIF−8 structure. The presence of Fe3O4 in m–ZIF−8 showed a decrease in surface area and N2 and CO2 uptake, with respect to pure ZIF−8. Alignment of m–ZIF−8 in Matrimid showed the presence of enriched pathways of m–ZIF−8 through the MMMs. At 10 wt.% m–ZIF−8 incorporation, no effect of alignment was observed for the N2 and CO2 permeability, which was ascribed anon-ideal tortuous alignment. However, alignment of 20 wt.% m–ZIF−8 in Matrimid showed to increase the CO2 diffusivity and permeability (19%) at 7 bar, while no loss in ideal selectivity was observed, with respect to homogeneously dispersed m–ZIF−8 membranes. Thus, the alignment of MOF particles throughout the matrix was shown to enhance the CO2 permeability at a certain weight content of MOF.

Zeolitic imidazolate framework composite membranes and thin films: synthesis and applications

2014 ◽  
Vol 43 (13) ◽  
pp. 4470-4493 ◽  
Author(s):  
Jianfeng Yao ◽  
Huanting Wang
Keyword(s):  
Thin Films ◽  
Composite Membranes ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Recent Developments ◽  
Matrix Membranes

The recent developments of zeolitic imidazolate framework (ZIF) membranes/films, ZIF–polymer mixed matrix membranes and their applications are reviewed in this article.

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