Download or read book Design and Development for Highly Permeable Mixed Matrix Membranes MMMs for Gas Separation written by Bilal Haider and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Porous Polymer Networks written by Vikas Mittal and published by . This book was released on 2019-01-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main aim of the book is to assimilate the fundamental know how about the synthesis, properties as well as applications of a large range of recently developed and commercially viable porous polymer networks.
Download or read book Mixed Matrix Membranes written by Clara Casado-Coterillo and published by MDPI. This book was released on 2019-12-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed matrix membranes (MMMs) have attracted a large amount of interest in research laboratories worldwide in recent decades, motivated by the gap between a growing interest in developing novel mixed matrix membranes by various research groups and the lack of large-scale implementation. This Special Issue contains six publications dealing with the current opportunities and challenges of mixed matrix membranes development and applications to solve environmental and health challenges of the society of 21st century.
Download or read book Gas Separation Membranes written by Ahmad Fauzi Ismail and published by Springer. This book was released on 2015-04-28 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the tremendous progress that has been made in the development of gas separation membranes based both on inorganic and polymeric materials. Materials discussed include polymer inclusion membranes (PIMs), metal organic frameworks (MOFs), carbon based materials, zeolites, as well as other materials, and mixed matrix membranes (MMMs) in which the above novel materials are incorporated. This broad survey of gas membranes covers material, theory, modeling, preparation, characterization (for example, by AFM, IR, XRD, ESR, Positron annihilation spectroscopy), tailoring of membranes, membrane module and system design, and applications. The book is concluded with some perspectives about the future direction of the field.
Download or read book Novel Cross linked Metal Organic Framework polyimide Mixed Matrix Membranes for Gas Separations written by Sumudu Nelukshi Wijenayake and published by . This book was released on 2013 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: In membranes for gas separations, the performance is evaluated based on gas permeability and selectivity of the membranes to the gas of interest. Permeability is a measure of membrane productivity, and selectivity is a measure of separation efficiency. High gas permeability and high selectivity are of significant importance for the commercial viability of membranes. However, there is a tradeoff between the permeability and selectivity in polymeric membranes, which requires new approaches to overcome this limitation. Combination of the high gas permeability of metal organic frameworks (MOFs), and the high selectivity obtained by different cross-linking methods holds potential for simultaneously increasing gas permeability and selectivity. Work described in this dissertation addresses this issue via cross-linking of MOF/mixed matrix membranes (MMMs) using three approaches. The first chapter describes the fabrication of mixed matrix membranes using zeolitic imidazolate framework-8 (ZIF-8), porous nano crystals in highly permeable polymer 6FDA-durene, and cross-linking the surface of the MMMs by reacting with ethylene diamine vapor. Addition of 33.3 wt% ZIF-8 yields a greatly improved permeability, while cross-linking increases gas selectivity for H2/CO2, H2/N2, H2/CH4 and O2/N2 separations. This method gives improved permeability and selectivity, however, full potential enhancement in selectivity is not obtained. In the second chapter, asymmetric membranes are fabricated by spin coating a 6FDA-durene polymer layer on highly permeable ZIF-8/6FDA-durene MMM substrates followed by subsequent cross-linking of the polymer layer by reacting with ethylene diamine vapor. This method utilizes the high permeability of the ZIF-8/6FDA-durene MMMs and the high selectivity of the cross-linked polymer layer. The fabricated asymmetric membranes show a desirable selectivity enhancement comparable to the cross-linked polymer and a high permeability similar to that of the pure polymer, transcending the upper bound of the Robeson plot (permeability selectivity trade-off curves) for H 2 /CO2 , H2 /N2 , and H 2 /CH4 separations. In chapter 3, total (bulk) cross-linking of a MMM is reported. ZIF-8 (33.3 wt%) is incorporated to thermally cross-linkable polymer propanediol monoester cross-linkable (PDMC) which results in improved permeability and selectivity. The MMM is cross-linked at 280 °C to obtain cross-linked PDMC (CPDM) MMM which shows improved permeability compared to the uncross-linked MMM.
Download or read book Fabrication and Comparison Between Poymeric Membrane with Mixed Matrix Membrane on Their Prformance for O2 N2 Separation written by Christabel Melanie Bangga and published by . This book was released on 2012 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of polymeric gas separation membranes is one of the fastest growing branches in membrane technology. There have been many research made on the improvement of the performance of polymeric membranes over the recent years. However, polymeric membranes are somewhat deficient in meeting the requirements of current membrane technology. Therefore, mixed matrix membranes (MMMs), comprising of rigid permeable or impermeable particles such as zeolites, carbon molecular sieves (CMS), silica, and carbon nanotubes, dispersed in a continuous polymeric matrix presents an interesting approach for improving the separation properties of polymeric membranes. The main objective of this study is to compare polymeric membranes with mixed matrix membranes on their performance for O2/N2 separation. This research observed the effect of coating agent, silicone rubber (polydimethylsiloxane) for surface improvement for polymeric membranes and MMMs, as well as the observation of the addition and modification of zeolite 4A using silane coupling agent, 3-aminopropyltrimethoxysilane (APTMOS) in the fabrication of MMMs. The fabrication of asymmetric flat sheet polymeric membranes and MMMs were prepared by using the dry/wet phase inversion technique. The prepared membranes were then coated with silicone rubber diluted in n-hexane in order to decrease the surface defects. Then, the membranes were tested using O2 and N2 gases using permeability test rig. The surface and morphology of the samples were identified by using Scanning Electron Microscopy (SEM). From the results obtained, the coating of membrane surface did enhance the selectivity of coated membranes by caulking the defects on the membrane outer surface layer. The incorporation of zeolite into polymer matrix thus somehow improved the performance of plain polymeric membrane by increasing of selectivity with high permeability. Based on the membrane performance results at 4 bar, the highest selectivity was found using coated modified MMMs at the value of 4.42, followed by coated unmodified MMMs at selectivity of 3.35, coated polymeric membranes at selectivity of 1.46, and finally uncoated polymeric membranes at selectivity of 1.44. The modification of zeolite surface using silane coupling agent improved the adhesion between zeolite and polymer which has increased the selectivity tremendously compared to the unmodified zeolite. Therefore, it is strongly agreed that coated modified MMMs is an alternative way to replace polymeric membranes for the application of membrane-based gas separation.
Download or read book Membranes For Gas Separations written by Moises A Carreon and published by World Scientific. This book was released on 2017-08-11 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at illustrating several examples of different membrane compositions ranging from inorganic, polymeric, metallic, metal organic framework, and composite which have been successfully deployed to separate industrially relevant gas mixtures including hydrogen, nitrogen, methane, carbon dioxide, olefins/parafins among others. Each book chapter highlights some of the current and key fundamental and technological challenges for these membranes that must be overcome in order to envision its application at industrial level.
Download or read book Metal Organic Frameworks as Heterogeneous Catalysts written by Francesc X. Llabrés i Xamena and published by Royal Society of Chemistry. This book was released on 2013-07-01 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the latest research and discovery in the use of MOFs in catalysis, highlighting the extent to which these materials have been embraced by the community.
Download or read book Membrane Engineering for the Treatment of Gases written by Enrico Drioli and published by Royal Society of Chemistry. This book was released on 2011-07-06 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes already have important applications in artificial organs, the processing of biotechnological products, food manufacture, waste water treatment, and seawater desalination. Their uses in gaseous mixture separations are, however, far from achieving their full potential. Separation of air components, natural gas dehumidification and sweeting, separation and recovery of CO2 from biogas, and H2 from refinery gases are all examples of current industrial applications. The use of membranes for reducing the greenhouse effect and improving energy efficiency has also been suggested. New process intensification strategies in the petrochemical industry have opened up another growth area for gas separation membrane systems and membrane reactors. This two volume set presents the state-of-the-art in membrane engineering for the separation of gases. It addresses future developments in carbon capture and utilization, H2 production and purification, and O2/N2 separation. Topics covered include the: applications of membrane gas separation in the petrochemical industry; implementation of membrane processes for post-combustion capture; commercial applications of membranes in gas separations; simulation of membrane systems for CO2 capture; design and development of membrane reactors for industrial applications; Pd-based membranes in hydrogen production; modelling and simulation of membrane reactors for hydrogen production and purification; novel hybrid membrane/pressure swing adsorption process for gas separation; molecular dynamics as a new tool for membrane design, and physical aging of membranes for gas separations. Volume 2 looks at problems combined with membrane reactors.
Download or read book Advanced Nanomaterials for Membrane Synthesis and Its Applications written by Woei Jye Lau and published by Elsevier. This book was released on 2018-11-21 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Nanomaterials for Membrane Synthesis and Its Applications provides the academic and industrial communities the most up-to-date information on the latest trends in membrane nanomaterials and membrane nanotechnology used in wastewater treatment, environmental technology and energy. The rapid advances in nanomaterials and nanotechnology development over the past decade have resulted in significant growth of the membrane business for various industrial processes, particularly in nanotechnology-based membrane processes. While membrane technology is increasingly being used for liquid and gas separations, it has great potential in a variety of additional applications. As the worldwide academic community has a strong interest in advanced membrane processes, particularly membrane nanotechnology for specific separations, this book provides a timely update on the topic. Presents a unique focus on the use of advanced nanomaterials in membrane fabrication/modification, and in the description of membrane nanotechnologies, such as nanofiltration, thin film nanocomposites and nanofibers for various applications Describes next generation membranes, providing first resource details on the development and commercialization stages of these new membranes Represents the state-of-the-art on the use of nanomaterials in membrane science
Download or read book Polymer Metal Organic Framework MOF Mixed matrix Membranes for Gas Separation Applications written by Qihui Qian and published by . This book was released on 2021 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-organic frameworks (MOFs) represent the largest known class of porous crystalline materials ever synthesized. Their narrow pore windows and nearly unlimited structural and chemical features have made these materials of significant interest for membrane-based gas separations. Mixed-matrix membranes (MMMs) formed by incorporating MOF particles into polymers have attracted significant attention because these composite systems can potentially surpass the separation performance of pure polymers alone. However, performance improvements are often unrealized because of poor interfacial compatibility between the MOF and the polymer, which results in interfacial defects. From a practical perspective, strategies are needed to address these defects so that MMMs can be deployed in real-world separation processes. From a fundamental perspective, strategies are needed to reliably form defect-free MMMs so that transport models can be applied to estimate pure-MOF property sets, thereby enabling the development of robust structure-property relationships. To address these interfacial challenges, this thesis describes a developed method to surface functionalize MOFs with nanoscopic shells of covalently tethered oligomers through various imidization routes. Upon embedding these post-synthetically modified (PSM) MOFs in high molecular weight polymers, defect-free MMMs were formed, revealing synergistic improvements in both permeability and selectivity due to enhanced interfacial compatibility. Additionally, pure-MOF permeabilities for various gases were predicted by the Maxwell Model. The PSM technique developed initially was further developed to address its generalizability to various MOFs, oligomer surface reactions, reaction conditions, and polymer compositions, providing robust guiding principles to form MMMs with excellent polymer-MOF interfacial compatibility. Finally, the potential of a novel MOF, MFU-4, as a filler in MMMs for CO2/H2S/CH4 separation was studied by dispersing the MOF in high molecular weight polymers. To validate a CO2-driven gate-opening mechanism proposed by other researchers earlier, a systematic temperature study of diffusion, sorption, and permeation through an MFU-4/polyimide MMM was carried out. Separation performance of the MMM did improve with decreasing temperatures, however, no obvious evidence of the gate-opening mechanism was found under the conditions tested.
Download or read book Materials for Carbon Capture written by De-en Jiang and published by John Wiley & Sons. This book was released on 2020-02-25 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers a wide range of advanced materials and technologies for CO2 capture As a frontier research area, carbon capture has been a major driving force behind many materials technologies. This book highlights the current state-of-the-art in materials for carbon capture, providing a comprehensive understanding of separations ranging from solid sorbents to liquid sorbents and membranes. Filled with diverse and unconventional topics throughout, it seeks to inspire students, as well as experts, to go beyond the novel materials highlighted and develop new materials with enhanced separations properties. Edited by leading authorities in the field, Materials for Carbon Capture offers in-depth chapters covering: CO2 Capture and Separation of Metal-Organic Frameworks; Porous Carbon Materials: Designed Synthesis and CO2 Capture; Porous Aromatic Frameworks for Carbon Dioxide Capture; and Virtual Screening of Materials for Carbon Capture. Other chapters look at Ultrathin Membranes for Gas Separation; Polymeric Membranes; Carbon Membranes for CO2 Separation; and Composite Materials for Carbon Captures. The book finishes with sections on Poly(amidoamine) Dendrimers for Carbon Capture and Ionic Liquids for Chemisorption of CO2 and Ionic Liquid-Based Membranes. A comprehensive overview and survey of the present status of materials and technologies for carbon capture Covers materials synthesis, gas separations, membrane fabrication, and CO2 removal to highlight recent progress in the materials and chemistry aspects of carbon capture Allows the reader to better understand the challenges and opportunities in carbon capture Edited by leading experts working on materials and membranes for carbon separation and capture Materials for Carbon Capture is an excellent book for advanced students of chemistry, materials science, chemical and energy engineering, and early career scientists who are interested in carbon capture. It will also be of great benefit to researchers in academia, national labs, research institutes, and industry working in the field of gas separations and carbon capture.
Download or read book Mixed Matrix Dual Layer Hollow Fiber Membranes for Natural Gas Separation written by Shabbir Husain and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed matrix membranes offer an attractive route to the development of high performance and efficiency membranes required for demanding gas separations. Such membranes combine the advantageous processing characteristics of polymers with the excellent separation productivity and efficiency of molecular sieving materials. This research explores the development of mixed matrix membranes, namely in the form of asymmetric hollow fiber membranes using zeolites as the molecular sieving phase and commercially available high performance polymers as the continuous matrix. Lack of adhesion between the typically hydrophobic polymer and the hydrophilic native zeolite surface is a major hurdle impeding the development of mixed matrix membranes. Silane coupling agents have been used successfully to graft polymer chains to the surface of the zeolite to increase compatibility with the bulk polymer in dense films. However, transitioning from a dense film to an asymmetric structure typically involves significant processing changes, the most important among them being the use of phase separation to form the asymmetric porous structure. During the phase separation, it is believed that hydrophilic sieves can act as nucleating agents for the hydrophilic polymer lean phase. Such nucleation tendencies are believed to lead to the formation of gaps between the polymer and sieve resulting in poor mixed matrix performance. This research focuses on defining procedures and parameters to form successful mixed matrix hollow fiber membranes. The first part of this dissertation describes dope mixing procedures and unsuccessful results obtained using a silane coupling agent to enhance polymer-zeolite adhesion. The next section follows the development of a highly successful surface modification technique, discovered by the author, employing the use of a Grignard reagent. As a test case, two zeolites of different silicon-to-aluminum ratios are successfully modified and used to develop mixed matrix membranes with greatly increased gas separation efficiencies. The broad applicability of the surface treatment is also demonstrated by the successful incorporation of the modified zeolites in a second polymer matrix. The final section of the work describes the novel occurrence of large defects (macrovoids) caused by the presence of large zeolite particles proposing a particle size effect in the formation of such defects.
Download or read book Membrane Engineering for the Treatment of Gases written by Enrico Drioli and published by Royal Society of Chemistry. This book was released on 2011-07-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes already have important applications in artificial organs, the processing of biotechnological products, food manufacture, waste water treatment, and seawater desalination. Their uses in gaseous mixture separations are, however, far from achieving their full potential. Separation of air components, natural gas dehumidification and sweeting, separation and recovery of CO2 from biogas, and H2 from refinery gases are all examples of current industrial applications. The use of membranes for reducing the greenhouse effect and improving energy efficiency has also been suggested. New process intensification strategies in the petrochemical industry have opened up another growth area for gas separation membrane systems and membrane reactors. This two volume set presents the state-of-the-art in membrane engineering for the separation of gases. It addresses future developments in carbon capture and utilization, H2 production and purification, and O2/N2 separation. Topics covered include the: applications of membrane gas separation in the petrochemical industry; implementation of membrane processes for post-combustion capture; commercial applications of membranes in gas separations; simulation of membrane systems for CO2 capture; design and development of membrane reactors for industrial applications; Pd-based membranes in hydrogen production; modelling and simulation of membrane reactors for hydrogen production and purification; novel hybrid membrane/pressure swing adsorption process for gas separation; molecular dynamics as a new tool for membrane design, and physical aging of membranes for gas separations. Volume 1 focuses predominantly on problems relating to membranes.
Download or read book Membrane Fabrication written by Nidal Hilal and published by CRC Press. This book was released on 2015-03-02 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes play a crucial role in ensuring the optimum use and recovery of materials in manufacturing. In the process industries, they are required for efficient production and minimization of environmental impact. They are also essential for the efficient production of clean water, a significant global issue. Membrane Fabrication brings together ex
Download or read book The Development and Characterization of Novel Mixed Matrix Nembrane of Polymer and Metal Organic Framework Composites for Use in Gas Separation and Purification written by Rahmah A. Alessa and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal organic frameworks are three dimensional porous rigid materials consisting of secondary building units (SBUs), which are inorganic metals linked to organic ligands. While MOFs are fundamentally crystalline and porous solids, polymers can be flexible, malleable, and processable. These absolute differences in the nature of MOFs and polymers have actuated scientists to combine crystalline MOFs and flexible polymers to create hybrids with the necessary characteristics of these various materials in order to be used in many applications such as gas and liquid separation and purification. Research groups have investigated a variety of techniques for MOF-polymer hybrid materials, including the synthesis of mixed matrix membranes (MMMs), polymers grafted from MOF particles, polymers grafted via MOFs, polymers driving MOF growth, and the synthesis of MOFs utilizing polymer ligands. For the integration of MOF-polymer hybrid materials, these methods have used a wide range of polymers to generate form factors with specific polymer properties for a variety of applications, including separations, sensing, catalysis, and storage. The development of MOF-polymer hybrid materials with the features of MOFs in a flexible form factor will open the way for these materials to be used in the industrial world. We are attempting a new MMM synthesis in which an initial polymer-ZnO composite material is formed. Subsequent synthetic steps are then performed to convert the ZnO within the composite to HKUST-1 using literature techniques. Our synthetic method aims to remove some of the issuesiithat result from other MMM syntheses. In this project, we were trying to synthesize a polyethyleneimine (PEI)-based composite with ZnO as a platform for generating an HKUST-1 containing mixed matrix membrane. For each sample generated we include a base polymer (PEI), ZnO, a cross linking or curing agent (glycerol diglycidyl ether, polyethylene glycol diglycidyl ether) and, in some instances, an agent to control curing rates (4-(2-aminoethyl) aniline, jeffamine (polyetheramines) and sodium hydroxide. The composite films are soaked in an aqueous solution of Cu(NO3)2 followed by soaking in an ethanol solution of 1,3,5-benzenetricarboxylic acid (H3BTC) and dimethyl formamide. Previous studies indicate that the PEI polymer in combination with HKUST-1 should be effective in separations of gas mixtures that contain CO2. Therefore, combining both Metal Oxide-MOFs and PEI polymer will conduct highly efficient CO2 gas separations. This product undergoes SEM, EDS, FTIR, and XRD analysis.
Download or read book Polymeric Gas Separation Membranes written by D.R. Paul and published by CRC Press. This book was released on 2018-05-04 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric Gas Separation Membranes is an outstanding reference devoted to discussing the separation of gases by membranes. An international team of contributors examines the latest findings of membrane science and practical applications and explores the complete spectrum of relevant topics from fundamentals of gas sorption and diffusion in polymers to vapor separation from air. They also compare membrane processes with other separation technologies. This essential book will be valuable to all practitioners and students in membrane science and technology.
