Download or read book Modification of Selected Polymeric Membrane Permeability to Oxygen and Carbon Dioxide written by Priya Gopal and published by . This book was released on 1995 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Permeability Through Polymer Membranes written by Yang Wang and published by . This book was released on 1998 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Polymeric Membrane Synthesis Modification and Applications written by Chandan Das and published by CRC Press. This book was released on 2018-10-12 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes and membrane separation techniques have grown from a simple laboratory tool to an industrial process with considerable technical and commercial impact. The book deals with both the fundamental concepts of preparation, characterization and modification, practical applications along with recent advancements of electro-spun and phase inverted polymeric membranes. Divided into two parts, part one of this book covers the fundamental concepts and practical applications of novel electro-spun membranes while the latter covers basic concepts and further advancements of the conventional phase inverted membranes extensively. Key Features Covers fundamental concepts and practical applications of electro-spun and phase inverted polymeric membranes Includes general properties, characterization, preparation and modification of polymeric membranes Discusses advanced modification of polymeric membranes (functionalization, grafting) using phase inversion process, and effects of solubility parameter and additives on the phase inversion process Reviews electro-spun membranes for biomedical applications, industrial effluents treatment and removal of water contaminants Explores a separate economic analysis section for the discussed membranes
Download or read book The Permeation of Carbon Dioxide Oxygen and Nitrogen Through Weakly Basic Polymer Membranes written by Joseph George Tajar and published by . This book was released on 1970 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Membrane Modification written by Nidal Hilal and published by CRC Press. This book was released on 2016-04-19 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane Modification: Technology and Applications is written for engineers, scientists, graduate students, and researchers in the field of membrane science and technology, materials science, applied physics, chemistry, and environmental science. The book presents the complete range of membrane modification techniques used to increase efficiency of
Download or read book Evaluation of Polymeric Membranes for Gas Separation Process written by Jennifer Chih-Yi Chen and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of polymeric membranes for gas separations has provided an alternative to traditional energy-intensive processes, especially for hydrocarbon separations. Material studies of the membrane can provide insights to its formation and modification. Gas permeation behaviour through two types of polymeric membrane material is investigated herein. Though the main objective of our investigation was to determine the hydrocarbon gas permeation properties of poly(ether-b-amide) PEBAX® 2533 copolymer membranes over a range of operating temperatures and pressures, we first tested a poly(ethylene oxide) (PEO) membrane for permeability of ethane and ethylene. The screening results from the tests of PEO membranes containing silver salts, indicate that although PEO membranes may possess high olefin/paraffin selectivity through facilitated transport, difficult membrane preparation and unstable structure remain major obstacles to their commercial use. However, the knowledge acquired on preparation technique and permeability testing from these trials was carried over to our study of PEBAX® 2533 membranes. Permeability coefficients were determined at temperatures ranging from 25C̊ to 75C̊, and pressures from 25 psig to 200 psig for ethane, ethylene, nitrogen, propane, propylene, and carbon dioxide. The PEBAX® 2533 membranes showed high organic gas permeabilities. Plasticization effects on the membrane were pronounced with propane and propylene at elevated pressure (100 psig). Activation energies of permeation (Ep) were determined. Ep of nitrogen is nearly constant and is the highest among gases tested in the pressure range. Ep shows a linear decreasing trend as pressure increases for hydrocarbons. Relatively high selectivities (12 to 26) were observed for the polar and non-polar gas pair CO2/N2. As temperature increased, the selectivity of CO2/N2 decreased. This study provides the groundwork for the use of PEO and PEBAX® 2533 membranes for hydrocarbon separations.
Download or read book Membrane Gas Separation written by Benny Freeman and published by LibreDigital. This book was released on 2010-06-22 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conceived to give a snapshot of the current situation in this applied chemistry area described by experts in this field, this book provides the most recent and emerging results, supplementing the Editors book published by Wiley in 2006 to give the reader a feeling how this field is developing. This book's inter-disciplinary approach for theoreticians and experimentalists for future cross-fertilization of understanding and developments in the areas of membranes including polymer technology and green chemistry applications. This book is both a consistent and readable introduction to this phenome.
Download or read book Artificial Heart Program Conference National Heart Institute Artificial Heart Program Proceedings Washington D C June 9 13 1969 written by National Heart Institute (U.S.) and published by . This book was released on 1969 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Polymeric Membranes for Gas Separation Processes written by Jennifer Chih-Yi Chen and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1974 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Sponsored by The National Heart Institute Artificial Heart Program Edited by Ruth Johnsson Hegyeli written by Ruth Johnsson Hegyeli and published by . This book was released on 1969 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Heart Program Conference written by Ruth Johnsson Hegyeli and published by . This book was released on 1969 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Encyclopedia of Agricultural Food and Biological Engineering written by Dennis R. Heldman and published by CRC Press. This book was released on 2010-10-21 with total page 2001 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examining the role of engineering in delivery of quality consumer products, this expansive resource covers the development and design of procedures, equipment, and systems utilized in the production and conversion of raw materials into food and nonfood consumer goods. With nearly 2000 photographs, figures, tables, and equations including 128 color figures the book emphasizes and illustrates the various engineering processes associated with the production of materials with agricultural origin. With contributions from more than 350 experts and featuring more than 200 entries and 3600 references, this is the largest and most comprehensive guide on raw production technology.
Download or read book High Performance Polymer Membranes for CO2 Removal and Water Treatment written by Ahmad A. Shamsabadi and published by . This book was released on 2019 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: To decrease the current level of CO2 emissions appreciably, more efficient CO2-capture technologies are needed. Absorption is currently used widely to lower CO2 level in gases. However, it is relatively expensive (in terms of both operating and capital costs), bulky, and challenging to operate (foaming, entrainment and flooding of the absorber). Compared to absorption, the membrane technology is more energy-efficient, has lower operating costs, is compact and modular, and has a simple process. Among membranes, polymer of intrinsic microporosity (PIM) membranes with high free-volume created by rigid moieties have superior gas-transport properties. However, presently these membranes suffer from two fundamental and industrially0́0important problems of low-to-modest selectivity and fast physical aging. Among PIMs, pentiptycene-based membranes exhibit satisfactory selectivity, and excellent resistance against plasticization and physical aging. However, the presence of two ethereal oxygens in the backbone of these membranes causes efficient chain packing, resulting in a decrease in free volume and consequently gas permeability. Pentiptycene is a highly rigid moiety from iptycene family consisting of five benzene rings forming an H-shaped core block. A fractional free volume (FFV) of less than 0.2 has been reported for existing pentiptycene-based membranes. To enhance the FFV of pentiptycene-based membranes, in this work: for the first time a pentiptycene-based dianhydride containing two etheric oxygens was synthesized and characterized; and a high molecular-weight pentiptycene-based polyimide was synthesized and characterized. The polyimide showed remarkable thermal stability, excellent solubility in common organic solvents, and the highest CO2 permeability (812 barrer) among all reported pentiptycene-containing polymers (about 6 times higher than the most permeable one) without sacrificing the selectivity. Currently polymer membranes suffer from the trade-off relationship between the permeability and selectivity. The fabrication of membranes made from polymers embedded with nanomaterials can lead to mixed matrix membranes (MMMs) with high gas permeability and excellent sieving ability. However, the agglomeration of nanomaterials, the formation of interfacial defects, and the incompatibility between the polymer and nanomaterials are still challenges in the fabrication of MMMs. In this research, these fundamental problems were studied through engineering the dispersion of the nanoparticles in polymer matrices via nanoparticles functionalization and considering polymer chemistry. TiO2 nanoparticles were grafted using 3-aminopropyl-diethoxymethylsilane [a silane coupling agent (AS)], their surface was then modified using carboxymethyl chitosan (CMC), and, the modified TiO2 nanoparticles were incorporated into the Pebax as the polymer matrix. The Pebax-modified-TiO2 nanocomposite membranes showed improved CO2 permeability and CO2/N2 selectivity, compared to the pristine Pebax. Characterization techniques showed good compatibility of the nanoparticles and the polymer and satisfactory dispersion of the nanofillers into the polymer. The influence of cyanuric chloride (CC) nanoparticles and its derivatives, melamine (M) and 2, 4, 6-trihydazino-1, 3, 5-triazine (THDT), on the performance and characteristics of a polyurethane (PU)-based nanocomposite membranes was investigated. Characterization results showed that the CC nanoparticles were mostly distributed in the PU hard segments. Also, M and THDT nanoparticles were scattered in the PU soft segments. Incorporating organic nanoparticles with many amine groups (i.e., M and THDT) showed to be an appealing strategy to fabricate highly selective membranes. This work indicated how robust interfacial interactions between nanoparticles and a polymer improve the polymer/nanoparticles compatibility and lower the level of defects in CO2-separating membranes. Increasing daily demand for clean water and limited fresh water resources has motivated studies on sustainable water furification. The membrane technology is suitable for water and wastewater treatment owning to its compactness, simplicity, small footprints, and sustainability. Among membrane-based processes, forward osmosis (FO) is one of the most promising methods having high water recovery, hydraulic pressure independency, and low-cost. However, fouling and biofouling of thin-film composite (TFC) FO membranes are still major challenges. An attractive strategy to improve fouling-resistance of FO membranes is the addition of antibacterial nanomaterials to the active layer of a TFC membrane. We studied the primary antibacterial mode-of-action (MoA) of Ti3C2Tx MXene nanosheets against both Gram-negative and Gram-positive bacteria. To characterize the antibacterial properties of Ti3C2Tx MXene in a well-quantitative manner, we used the flow cytometry (FC) and fluorescence imaging (FI) techniques. Our results indicated that the antibacterial activity of the MXene nanosheets are both size- and time-dependent; that is, smaller sizes of the nanosheets result in the release of bacteria cytoplasmic DNA and eventually dispersion of the bacteria envelope. In another work, we synthesized and characterized a silver-based metal-organic framework (Ag-MOF) embellished with graphene oxide (GO) [GO-Ag-MOF] with potent antibacterial activity. A thin-film nanocomposite (TFN) membrane with superior anti-biofouling and good antifouling properties was fabricated the GO-Ag-MOF nanocomposite to the selective layer of a TFC membrane. In addition to membrane characterization, fouling and antifouling resistance of the membrane was assessed through FO experiments in the presence of sodium alginate and E.coli and in the feed solution, respectively.
