scholarly journals The Optimization of Dispersion and Application Techniques for Nanocarbon-Doped Mixed Matrix Gas Separation Membranes

Membranes ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 87
Author(s):  
Ruben Hammerstein ◽  
Tim Schubert ◽  
Gerd Braun ◽  
Tobias Wolf ◽  
Stéphan Barbe ◽  
...  
Keyword(s):  
Gas Separation ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Parameter Study ◽  
Mixed Matrix ◽  
Electrically Conductive ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Roll Mill ◽  
Application Techniques

In this work, supported cellulose acetate (CA) mixed matrix membranes (MMMs) were prepared and studied concerning their gas separation behaviors. The dispersion of carbon nanotube fillers were studied as a factor of polymer and filler concentrations using the mixing methods of the rotor–stator system (RS) and the three-roll-mill system (TRM). Compared to the dispersion quality achieved by RS, samples prepared using the TRM seem to have slightly bigger, but fewer and more homogenously distributed, agglomerates. The green γ-butyrolactone (GBL) was chosen as a polyimide (PI) polymer-solvent, whereas diacetone alcohol (DAA) was used for preparing the CA solutions. The coating of the thin CA separation layer was applied using a spin coater. For coating on the PP carriers, a short parameter study was conducted regarding the plasma treatment to affect the wettability, the coating speed, and the volume of dispersion that was applied to the carrier. As predicted by the parameter study, the amount of dispersion that remained on the carriers decreased with an increasing rotational speed during the spin coating process. The dry separation layer thickness was varied between about 1.4 and 4.7 μm. Electrically conductive additives in a non-conductive matrix showed a steeply increasing electrical conductivity after passing the so-called percolation threshold. This was used to evaluate the agglomeration behavior in suspension and in the applied layer. Gas permeation tests were performed using a constant volume apparatus at feed pressures of 5, 10, and 15 bar. The highest calculated CO2/N2 selectivity (ideal), 21, was achieved for the CA membrane and corresponded to a CO2 permeability of 49.6 Barrer.

Development of zeolite filled polycarbonate mixed matrix gas separation membranes

Desalination ◽  
2006 ◽  
Vol 200 (1-3) ◽  
pp. 222-224 ◽  
Author(s):  
Deger Sen ◽  
Halil Kalipcilar ◽  
Levent Yilmaz
Keyword(s):  
Gas Separation ◽  
Mixed Matrix ◽  
Separation Membranes ◽  
Gas Separation Membranes

Fabrication of polyimide and covalent organic frameworks mixed matrix membranes by in situ polymerization for preliminary exploration of CO2/CH4 separation

2018 ◽  
Vol 31 (6) ◽  
pp. 671-678 ◽  
Author(s):  
Jiyang Liu ◽  
Miaoqing Liu ◽  
Jianjun Lu
Keyword(s):  
Gas Separation ◽  
In Situ Polymerization ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Gravimetric Analysis ◽  
High Porosity ◽  
Covalent Organic Frameworks ◽  
Mixed Matrix ◽  
The Fourier Transform ◽  
Matrix Membranes

More and more polyimide (PI) mixed matrix membranes (MMMs) have been reported for gas separation. In this study, a novel PI MMM, named as PI/SNW-1 and composed of PI and Schiff base network (SNW) type covalent organic frameworks (COFs) SNW-1, was used for gas permeation measurements of carbon dioxide (CO2) and methane (CH4). The prepared PI/SNW-1 was investigated by the Fourier transform infrared spectroscopy, the field emission scanning electron microscopy, and the thermal gravimetric analysis. The results indicated that PI/SNW-1 had maintained a high thermal stability and uniform distribution of filler. Compared with the pure PI membrane, MMMs showed an increment of 48.7% in ideal selectivity of CO2/CH4 and an enhancement of 106.4% in CO2 permeability at 5 wt% SNW-1. The enhancement of permeability and selectivity was mainly attributed to the high porosity of SNW-1, the specific sorption affinity for CO2, and the close interface interaction with the PI matrix. It can be seen that PI/SNW-1 has a great potential for actual gas separation.

scholarly journals ZIF-8/Cellulose Acetate Based Mixed Matrix Membranes (MMMs) Synthesis and Characterization

2021 ◽  
Vol 104 ◽  
pp. 57-64
Author(s):  
Putu Doddy Sutrisna ◽  
Candra Wijaya ◽  
Christoper Robby ◽  
Jessy Liliani
Keyword(s):  
Particle Dispersion ◽  
Degree Of Crystallinity ◽  
Mixed Matrix Membranes ◽  
Synthesis And Characterization ◽  
Inorganic Filler ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Matrix Membranes

Mixed matrix membranes (MMMs) have gained much interest in the last two decades to be used as water, waste water, and gas separation membranes. MMMs combine polymer matrix and inorganic filler to improve the performances of pure polymeric membranes. However, the choice of filler should be conducted carefully to avoid the formation of microvoids that can decrease the membrane’s performances. Hence, in this study the synthesis and characterization of Zeolitic Imidazolate Framework-8 (ZIF-8) based MMMs were conducted in which the ZIF-8 has organic component that can improve the particle dispersion and avoid the formation of microvoids. Experimental results showed that ZIF-8 incorporation improved the degree of crystallinity of MMMs and also enhanced the particle dispersion compared to pure inorganic fillers, such as TiO2.

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

Membranes ◽  
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.

Investigation of the silica pore size effect on the performance of polysulfone (PSf) mixed matrix membranes (MMMs) for gas separation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gholamhossein Vatankhah ◽  
Babak Aminshahidy
Keyword(s):  
Mesoporous Silica ◽  
Pore Size ◽  
Gas Separation ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Small Pore ◽  
Mcm 41 ◽  
Matrix Membranes

Abstract MCM-41 and SBA-15 mesoporous silica materials with different pore sizes (3.08 nm for small pore size MCM-41 (P 1), 5.89 nm for medium pore size SBA-15 (P 2), and 7.81 nm for large pore size SBA-15 (P 3)) were synthesized by the hydrothermal method and then functionalized with 3-aminopropyltrietoxysilane by postsynthesis treatments. Next, polysulfone-mesoporous silica mixed matrix membranes (MMMs) were prepared by the solution casting method. The obtained materials and MMMs were characterized by various techniques including X-ray diffraction, scanning electron microscopy, and N2 adsorption-desorption, and Brunauer-Emmett-Teller method to examine the crystallinity, morphology, and particle size, pore volume, specific surface area, and pore size distribution, respectively. Finally, the gas permeation rates of prepared MMMs were measured in 8 bar and 25 °C and the effect of pore size of modified and unmodified mesoporous silica on the gas separation performance of these MMMs were investigated. The experimental results indicate that the carbon dioxide (CO2) and methane (CH4) permeability and CO2/CH4 selectivity were increased with an enhancement in the particle pore size.

Optimization analysis of polyurethane based mixed matrix gas separation membranes by incorporation of gamma-cyclodextrin metal organic frame work

2020 ◽  
Vol 74 (10) ◽  
pp. 3527-3543
Author(s):  
Ovaid Mehmood ◽  
Sarah Farrukh ◽  
Arshad Hussain ◽  
Ayesha Rehman ◽  
Yangxian Liu ◽  
...  
Keyword(s):  
Gas Separation ◽  
Mixed Matrix ◽  
Optimization Analysis ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Metal Organic ◽  
Frame Work ◽  
Gamma Cyclodextrin
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