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Showing 1 to 20 of 52 for “"Composite Membranes"”.
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Palladium and palladium-copper composite membranes for hydrogen separation
Includes bibliographical references.
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New substrates for palladium and palladium-copper composite membranes
Includes bibliographical references (pages 116-120).
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Composite Membranes: The Permeation of Gases Through Deposited Monolayers
Made available in DSpace on 2014-12-08T23:18:22Z (GMT). No. of bitstreams: 1 6812188.pdf: 4102892 bytes, checksum: b098ae58799e3ca3671fa27b0a8a4458 (MD5) Previous issue date: 1968
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Mixed ion and electron conducting polymer composite membranes for artificial photosynthesis
… in water, highly conductive OH⁻conducting membranes were developed for alkaline water electrolysis. The membranes were semi-interpenetrating networks of crosslinked poly(vinyl alcohol) (PVA) and a polycation miscible with PVA. It is analogous to aqueous strong base solution. The polycation …
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DEVELOPMENT OF FUNCTIONAL NANOPARTICLES AND COMPOSITE MEMBRANES FOR TREATING ARSENIC CONTAMINATED WATER
… OF THE RELATED NANOPARTICLES EMBEDDED FLAT SHEET MEMBRANES WERE SYNTHESIZED BY PHASE INVERSION METHOD. BOTH THE BATCH AND FILTRATION EXPERIMENT WERE CONDUCTED TO INVESTIGATE THE ARSENIC ADSORPTION BEHAVIOR OF THE MATERIALS. A SERIES OF CHARACTERIZATION STUDIES WERE CARRIED OUT TO FULLY UNDERSTAND …
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Growth dynamics, charge density, and structure of polyamide thin-film composite membranes
… polymerization of polyamide for thin-film composite reverse osmosis membranes using diffuse reflectance spectroscopy, Rutherford backscattering spectrometry (RBS), and atomic force microscopy (AFM); (2) quantifying the effects of trimesoyl choride (TMC) and m-phenylenediamine (MPD) monomer …
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Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells
Several types of novel proton exchange membranes which could be used for both direct methanol fuel cells (DMFCs) and hydrogen/air fuel cells were investigated in this work. One of the main challenges for DMFC membranes is high methanol crossover. Nafion, the current perfluorosulfonic acid copolymer …
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Synthesis and characterization of purely sulphonated and composite membranes for high temperature fuel cells
… other was to improve Nafion by synthesizing a composite. Both of these methods involved the sulphonated silane 2-4-chlorosulphonylphenethyltrimethoxysilane. Methods to characterize membranes to observe their properties compared to Nafion were thermogravimetric analysis (TGA), Fourier …
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Interfacially polymerized thin film composite membranes on microporous polypropylene supports for reverse osmosis desalination
… (IP) is used to fabricate thin film composite (TFC) membranes. In experiments here, microporous polypropylene (PP) flat film membranes were used as a support for fabricating TFC membranes for reverse osmosis by the IP technique. Substantial chemical, pH, and solvent resistance is …
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Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications
… problem in electroless-plated palladium-based composite membranes has been revisited. Palladium was doped with a higher melting point element such as ruthenium or platinum and the rate of increase of the nitrogen leak in the temperature range of 500-600 ºC was determined. The results showed …
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Development of Thin-Film Composite Membranes Incorporated With Graphene Oxide and Derivatives for Forward Osmosis Processes
… and separation performance of the thin-film composite (TFC) membranes. Nonetheless, very few studies provided an in-depth explanation of the possible interaction between GO and polymer matrix that alter the membrane properties and performance. Thus, the overall aim of this study was to …
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Study on Structure and Vacuum Membrane Distillation Performance of PVDF Composite Membranes: Influence of Molecular Weight and Blending
In this study, membranes were made from three polyvinylidene fluoride (PVDF) polymers individually and the blend systems of high (H) and low (L) molecular weight PVDF by phase inversion process. After investigating membrane casting solutions’ viscous and thermodynamic properties, the membranes so …
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Controlling the mechanical and transport properties of layer-by-layer films and electrospun mat composite membranes for fuel cell applications
… and utilization of multilayer systems and system composites as the PEM in hydrogen and methanol fuel cells, focusing on improving and understanding the improvements to the properties of layer-by-layer films and composite membranes for fuel cell applications by targeting two main areas: the …
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Fabrication of Ultrathin Palladium Composite Membranes by a New Technique and Their Application in the Ethanol Steam Reforming for H₂ Production
… for the preparation of ultrathin Pd based membranes supported on a hollow-fiber α-alumina substrate for H₂ separation. The effectiveness of the membranes is demonstrated in the ethanol steam reforming (EtOH SR) reaction in a membrane reactor (MR) for H₂ production. The membrane preparation …
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Design of Advanced Materials With Novel Microstructural Features
… illustrated the preparation of proton-conducting composite membranes for fuel cells. Composite membranes were prepared by solution blending sulfonated poly (ether ether ketone) and polyacrylonitrile in DMF and heating under nitrogen at 380 °C. This novel system offered a possible low-cost …
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Polymer/nano-organic composite proton exchange membranes for direct methanol fuel cell application
… of Nafion membrane, three different kinds of membranes have been studied in this thesis. These membranes are SPEEK membranes, SPEEK/ZP composite membranes and Nafion/ZP composite membranes.
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Design and characterization of zeolite membranes for fluid separation
… structures, properties and applications as membranes for separation purposes. Thin layers of silicalite-1 and Na-LTA zeolites have been synthesised onto carbon-graphite supports using a hydrothermal synthesis procedure. The separation behaviour of the composite membranes was characterized by …
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Development of Proton Exchange Membrane for Fuel Cell and Electrolyzer
… and evaluation of advanced polymer electrolyte membranes (PEMs) suitable for proton exchange membrane fuel cells (PEMFCs) and water electrolysis systems. Two novel membrane design strategies were investigated: (i) modification of porous PTFE substrates with dopamine and sulfonated dopamine to …
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Modified Nafion membranes for hydrogen production in Cu-Cl thermochemical cycle
… cell. In this research, we have modified Nafion membranes, with different thicknesses, by in situ polymerization with pyrrole and aniline compounds. Ex situ permeation experiments were performed along with impedance spectroscopy to investigate the rate of the copper crossover and the proton …
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