scholarly journals Stepwise observation and quantification and mixed matrix membrane separation of CO2 within a hydroxy-decorated porous host

2017 ◽  
Vol 8 (4) ◽  
pp. 3239-3248 ◽  
Author(s):  
Christopher G. Morris ◽  
Nicholas M. Jacques ◽  
Harry G. W. Godfrey ◽  
Tamoghna Mitra ◽  
Detlev Fritsch ◽  
...  
Keyword(s):  
Membrane Separation ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Separation Of Co2

CO2 binding and separation using porous MFM-300(VIII) has been fully studied.

scholarly journals An insight into the effect of azobenzene functionalities studied in UiO-66 frameworks for low energy CO2 capture and CO2/N2 membrane separation

2019 ◽  
Vol 7 (25) ◽  
pp. 15164-15172 ◽  
Author(s):  
Nicholaus Prasetya ◽  
Bradley P. Ladewig
Keyword(s):  
Co2 Capture ◽  
Membrane Separation ◽  
Low Energy ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Insight Into

Tailoring the content of the light-responsive ligand in UiO-66 topology through a mixed-linker approach for CO2 adsorbent and mixed matrix membrane application.

scholarly journals Mixed Matrix Membrane Performance Prediction for Gas Separation using Modified Models

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
A. Salimi ◽  
O. Bakhtiari ◽  
M. K. Moghaddam ◽  
T. Mohammadi
Keyword(s):  
Gas Separation ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Membrane Separation ◽  
Maxwell Model ◽  
Industrial Applications ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Two Parameters

Gas separation using membrane processes are potentially economical in industrial scale. Two parameters are used for analyzing the membrane separation performance: permeability and selectivity. There is a trade off between them for polymeric membranes that makes it impossible to increase both of them simultaneously. Molecular sieve membranes, on the other hand, exhibit high permeability and selectivity but are brittle in nature and costly. A new generation of membranes has made many hopes to use simultaneously both desired properties of polymers and molecular sieves in a structure called “mixed matrix membrane (MMM)” where a molecular sieve is incorporated within a polymer matrix. As other branches of science and engineering, having a tool to predict MMMs performance seems to be essential to save time and money for research and industrial applications. Many mathematical models were developed to predict MMMs performance based on separation performance of fillers and polymers. Maxwell model is the simplest model developed for prediction of electrical properties of composite materials but it is not perfect for all cases. Some modifications were performed on Maxwell model and some other modified models were developed for better prediction of MMMs separation performance. In this research, modified Maxwell and Bruggeman models were employed to predict gas separation performance of some MMMs in the current work and the results were acceptable for all non–ideal cases which might be occurred in MMMs structure.

Separation of CO2 from CH4 using a synthesized Pebax-1657/ZIF-7 mixed matrix membrane

2017 ◽  
Vol 35 (7) ◽  
pp. 667-673 ◽  
Author(s):  
Ashkan Khoshkharam ◽  
Navid Azizi ◽  
Reza Mosayebi Behbahani ◽  
Mohammad Ali Ghayyem
Keyword(s):  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Separation Of Co2

scholarly journals Preparation and Gas Separation Performance of Polysulfone Mixed Matrix Membrane

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Lili Jiang ◽  
Yimin Meng ◽  
Su Xu ◽  
Haitao Yu ◽  
Xingang Hou
Keyword(s):  
Carbon Nanotubes ◽  
Gas Separation ◽  
Permeability Coefficient ◽  
Membrane Separation ◽  
Polymer Materials ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Simple Modification ◽  
The Ideal

As an economical, environmentally friendly, and highly efficient separation technology, membrane separation is a popular research topic in the field of separation. Organic polymer materials have attracted considerable attention in membrane separation because of their controllable preparation processes, simple modification method, and high toughness. Taking polysulfone (PSF) as the substrate of gas separation membrane, we prepared the mixed matrix membrane jointly by using the solution casting method and by adding graphene oxide (GO) and carbon nanotubes (CNTs). On this basis, the permeability of the membrane for CO2 and N2 and the permeability coefficient of the mixed gas were studied. With the addition of CNTs and GO, the permeability of gas was significantly improved. At 0.2 MPa, permeability of CO2 increased from 553 Barrer to 975 Barrer, and permeability of N2 increased from 536 Barrer to 745 Barrer. The max ideal separation coefficient of CO2 and N2 is 1.94 at 0.1 MPa. Increasing of the content of carbon nanotubes can significantly improve the permeability coefficient of CO2, while the change of inlet side pressure has a great impact on the permeability coefficient of N2. At 0.1 MPa, when the ratio of CNTs to GO was 5 : 1, the ideal permeability coefficient of CO2/N2 was 1.94, whereas the ideal permeability coefficient of PSF membrane was 1.46. The above results of PSF/GO/CNT mixed matrix membrane lay a theoretical foundation for industrial application.

Aqueous One-Step Modulation for Synthesizing Monodispersed ZIF-8 Nanocrystals for Mixed-Matrix Membrane

2021 ◽  
Vol 13 (9) ◽  
pp. 11296-11305
Author(s):  
Xu Jiang ◽  
Shanshan He ◽  
Gang Han ◽  
Jun Long ◽  
Songwei Li ◽  
...  
Keyword(s):  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
One Step

Kinetics studies on free radical scavenging property of ceria in polysulfone–ceria radiation resistant mixed-matrix membrane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amita Bedar ◽  
Beena G. Singh ◽  
Pradip K. Tewari ◽  
Ramesh C. Bindal ◽  
Soumitra Kar
Keyword(s):  
Radical Scavenging ◽  
Radiation Environment ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Ceria Nanoparticles ◽  
Ros Scavenging ◽  
Mixed Matrix ◽  
Stable States ◽  
Host Matrix ◽  
Γ Radiation

Abstract Cerium oxide (ceria) contains two stable states of cerium ions (Ce3+ and Ce4+). The presence of these two states and the ability to swap from one state to another (Ce3+ ↔ Ce4+) by scavenging the highly reactive oxygen species (ROS) generated from radiolysis of water, ensure the enhanced stability of polysulfone (Psf) membranes in the γ-radiation environment. In this study, the ROS scavenging ability of ceria was studied. Ceria nanoparticles were found to scavenge ROS like hydroxyl radicals and hydrogen peroxide (H2O2). The H2O2 scavenging is due to the peroxidase-like catalytic activity of ceria nanoparticles. The ROS scavenging is responsible for offering protection to the Psf host matrix and in turn the stability to the Psf-ceria mixed-matrix membranes (MMMs) in γ-radiation environment. Thus, presence of ceria nanoparticles provides an opportunity for utilizing Psf-ceria MMMs in ionizing radiation environment with increased life span, without compromise in the performance.

scholarly journals Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 194
Author(s):  
Xiuxiu Ren ◽  
Masakoto Kanezashi ◽  
Meng Guo ◽  
Rong Xu ◽  
Jing Zhong ◽  
...  
Keyword(s):  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Mixed Matrix ◽  
Translation Model ◽  
Good Thermal Stability ◽  
Oligomeric Silsesquioxane

A new polyhedral oligomeric silsesquioxane (POSS) designed with eight –(CH2)3–NH–(CH2)2–NH2 groups (PNEN) at its apexes was used as nanocomposite uploading into 1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica to prepare mixed matrix membranes (MMMs) for gas separation. The mixtures of BTESE-PNEN were uniform with particle size of around 31 nm, which is larger than that of pure BTESE sols. The characterization of thermogravimetric (TG) and gas permeance indicates good thermal stability. A similar amine-contained material of 3-aminopropyltriethoxysilane (APTES) was doped into BTESE to prepare hybrid membranes through a copolymerized strategy as comparison. The pore size of the BTESE-PNEN membrane evaluated through a modified gas-translation model was larger than that of the BTESE-APTES hybrid membrane at the same concentration of additions, which resulted in different separation performance. The low values of Ep(CO2)-Ep(N2) and Ep(N2) for the BTESE-PNEN membrane at a low concentration of PNEN were close to those of copolymerized BTESE-APTES-related hybrid membranes, which illustrates a potential CO2 separation performance by using a mixed matrix membrane strategy with multiple amine POSS as particles.

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