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Tesi sul tema "Membranes (Technology)"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

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1

Sorensen, E. Todd. "Cross-linkable polyimide blends for stable membranes." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/10086.

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2

Keuler, Johan Nico. "Preparation and characterisation of palladium composite membranes." Thesis, Link to the online version, 1997. http://hdl.handle.net/10019/1431.

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3

Bighane, Neha. "Novel silica membranes for high temeprature gas separations." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43732.

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Membrane materials for gas separations span a wide range including polymers, metals, ceramics and composites. Our aim is to create economical hydrothermally stable membranes that can provide high H₂-CO₂ separation at a temperature of 300 degree Celsius, for application in the water-gas shift reactor process. The present work describes the development of novel silica and silica-titania membranes from the controlled oxidative thermolysis of polydimethylsiloxane. The scope of this thesis is fabrication of membranes, material characterization and preliminary gas permeation tests (35-80 degree Cels

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4

Keuler, Johan Nico. "Optimising catalyst and membrane performance and performing a fundamental analysis on the dehydrogenation of ethanol and 2-butanol in a catalytic membrane reactor." Thesis, Link to the online version, 2000. http://hdl.handle.net/10019.1/1277.

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5

Poletto, Patrícia. "Caracterização de membranas de poliamida 66 preparadas pelo método de inversão de fases." reponame:Repositório Institucional da UCS, 2010. https://repositorio.ucs.br/handle/11338/573.

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Neste trabalho foram preparadas membranas de poliamida 66 (PA 66) pelo método de inversão de fases (IF) e caracterizadas com o objetivo de verificar sua possível aplicação em processos de separação. As membranas de PA 66 foram preparadas utilizando dois solventes diferentes, ácido fórmico (AF) e ácido clorídrico (HCl) e água como não-solvente. As membranas preparadas na forma de filmes (não suportadas) foram caracterizadas por Espectroscopia de Infravermelho com Transformada de Fourier (FT-IR) e calorimetria exploratória diferencial (DSC), onde os resultados mostraram que a estrutura química e

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6

Handelsman, Timothy David. "Membranes for Biorefineries." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14569.

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This thesis tested the hypothesis that whilst membranes may enable biorefineries to meet discharge specifications, such ‘end-of-pipe’ treatment options are sub-optimal. Greater savings can potentially be made by internal and/or upfront use of membranes. Biorefineries are used to make a wide range of products from substrates such as molasses, corn syrup and cellulosic materials, producing biofuels, pharmaceutical products and mass production of various microorganisms. These are generally produced at low concentrations, resulting in large amounts of wastewater. These wastewaters also contain hig

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7

McCool, Benjamin A. "Synthesis and Characterization of Microporous Silica Membranes Fabricated through Pore Size Reduction of Mesoporous Silica Membranes Using Catalyzed Atomic Layer Deposition." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/McCoolBA2004.pdf.

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8

Borgsmiller, Karen McNeal. "Synthetic membranes for chiral separations." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/11824.

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9

Thrasher, Stacye Regina. "Polymeric membranes for organic vapor recovery." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/12358.

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10

Medugno, Cláudia Conti. "Fases de membranas fluidas -L3 a partir de lipídio sintético e pentanol na região diluída - e o respectivo dialisado." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266692.

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Orientador: Elias Basile Tambourgi<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T02:38:39Z (GMT). No. of bitstreams: 1 Medugno_ClaudiaConti_D.pdf: 3413427 bytes, checksum: 721bb3035fab10b9b0a1619381a0b4e0 (MD5) Previous issue date: 2012<br>Resumo: A fase L3 (esponja) foi observada no final dos anos 80 e representa uma nova classe de auto moldagem para sistemas surfactantes em água. Esse trabalho descreve a descoberta e a posterior caracterização de uma fase ternária composta do lipídio sintético catiônico br

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11

Harper, Davnet. "Novel applications of membrane technology." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248220.

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12

Kosuri, Madhava Rao. "Polymeric membranes for super critical carbon dioxide (scCO2) separations." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28242.

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Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: William J. Koros; Committee Member: Amyn Teja; Committee Member: Carson Meredith; Committee Member: Sankar Nair; Committee Member: Wallace W. Carr.

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13

Vatcha, Sorab R. "Gas separation by membranes : technology and business assessment." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15233.

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14

Nel, A. M. "Removal of organic foulants from capillary ultrafiltration membranes by use of ultrasound." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1997.

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15

Govender, Selvakumaran. "Bioaffinity separation using ligand-modified pluronic and synthetic membranes." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/16516.

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Thesis (PhD)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: A new membrane based affinity separation system that is bio-specific, biocompatible, well characterised and capable of being regenerated or re-used is described. The amphiphilic non-ionic surfactant Pluronic® F108, was covalently derivatised to form two novel bioligands (Pluronic-Biotin and Pluronic-DMDDO) for the bio-specific immobilisation of avidin conjugated proteins and histidine tagged proteins respectively. Pluronic was also used to non-covalently functionalise nonporous membranes for ligand attachment and to sim

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16

Kiyono, Mayumi. "Carbon molecular sieve membranes for natural gas separations." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42798.

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A new innovative polymer pyrolysis method was proposed for creation of attractive carbon molecular sieve (CMS) membranes. Oxygen exposure at ppm levels during pyrolysis was hypothesized and demonstrated to make slit-like CMS structures more selective and less permeable, which I contrary to ones expectation. Indeed prior to this work, any exposure to oxygen was expected to result in removal of carbon mass and increase in permeability. The results of this study indicated that the separation performance and CMS structure may be optimized for various gas separations by careful tuning of the oxy

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17

Song, Qilei. "Polymer molecular sieve membranes." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/280264.

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Sustainable energy supply and environmental protection are the major global scientific challenges in the 21st century, such as greenhouse gas capture, natural gas production, desalination of seawater for clean water production. Membrane separation technology offers attractive energy-efficient and environmental-friendly solutions to these challenges. This PhD thesis is focused on design and fabrication of membranes from novel molecularly defined polymers and understanding their physical properties, particularly the transport properties of gas molecules in polymer membranes. First, we demonstrat

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18

Hancocks, Robin Danyel. "Controlled emulsification using microporous membranes." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/3057/.

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Emulsions are a vital part of many products in everyday use, such as foods, cosmetics, and even construction materials. Membrane emulsification is a technique which has been used to produce emulsions in a manner contrary to the traditional methods where droplets are broken and re-broken to make smaller and smaller droplets, and instead each droplet is individually formed at a pore on the surface of the membrane. This research compared two of the most favoured membrane emulsification techniques; cross-flow and rotating membrane emulsification. Two systems were built for producing emulsions usin

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19

Ma, Canghai. "Optimization of asymmetric hollow fiber membranes for natural gas separation." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43700.

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Compared to the conventional amine adsorption process to separate CO₂ from natural gas, the membrane separation technology has exhibited advantages in easy operation and lower capital cost. However, the high CO₂ partial pressure in natural gas can plasticize the membranes, which can lead to the loss of CH₄ and low CO₂/CH₄ separation efficiency. Crosslinking of polymer membranes have been proven effective to increase the CO₂ induced plasticization resistance by controlling the degree of swelling and segmental chain mobility in the polymer. This thesis focuses on extending the success of crossli

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20

Liu, Junqiang. "Development of next generation mixed matrix hollow fiber membranes for butane isomer separation." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42807.

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Mixed matrix hollow fiber membranes maintain the ease of processing polymers while enhancing the separation performance of the pure polymer due to inclusion of molecular sieve filler particles. This work shows the development process of high loading mixed matrix hollow fiber membranes for butane isomer separation, from material selection and engineering of polymer-sieve interfacial adhesion to mixed matrix hollow fiber spinning. The matching of gas transport properties in polymer and zeolite is critical for forming successful mixed matrix membranes. The nC4 permeability in glassy commercial p

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21

Meyer, Faiek. "Hydrogen selective properties of cesium-hydrogensulphate membranes." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5047_1233727545.

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<p>Over the past 40 years, research pertaining to membrane technology has lead to the development of a wide range of applications including beverage production, water purification and the separation of dairy products. For the separation of gases, membrane technology is not as widely applied since the production of suitable gas separation membranes is far more challenging than the production of membranes for eg. water purification. Hydrogen is currently produced by recovery technologies incorporated in various chemical processes. Hydrogen is mainly sourced from fossil fuels via steam reformatio

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22

Costello, Michael John School of Chemical Engineering &amp Industrial Chemistry UNSW. "SHELL-SIDE FLUID DYNAMICS AND MASS TRANSFER THROUGH HOLLOW FIBRE MEMBRANE MODULES." Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 1995. http://handle.unsw.edu.au/1959.4/17042.

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There is a considerable volume of work available in literature which suggests that the performance of axial-flow hollow fibre membrane modules is limited by poorly distributed flow through the shell-side. This study was commissioned to examine the distribution of shell-side flow and its effect on mass transfer and to compare the performance measured by the axial-flow configuration to that obtained by a commonly used alternative known as the helically-wound module design. Laminar flow and mass transfer models have been developed to examine performance through axial-flow hollow fibre modules.

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23

Bae, Tae-Hyun. "Engineering nanoporous materials for application in gas separation membranes." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42712.

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The main theme of this dissertation is to engineer nanoporous materials and nanostructured surfaces for applications in gas separation membranes. Tunable methods have been developed to create inorganic hydroxide nanostructures on zeolite surfaces, and used to control the inorganic/polymer interfacial morphology in zeolite/polymer composite membranes. The study of the structure-property relationships in this material system showed that appropriate tuning of the surface modification methods leads to quite promising structural and permeation properties of the membranes made with the modified zeol

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24

Rao, Prithi Ananthayya Buschle-Diller Gisela. "Permeation of vapors through porous membranes." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/RAO_PRITHI_41.pdf.

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25

Lanigan, William Robert. "A study of photopolymerized microporous membranes." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/8583.

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26

Ogbuke, Ikechukwu. "Preparation, characterization and testing of inorganic ceramic membranes." Thesis, Robert Gordon University, 2013. http://hdl.handle.net/10059/2111.

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A novel approach to enhance the concentration of Carbon dioxide to economic scale using low efficient Inorganic Ceramic membranes has been proposed. This was achieved by the addition of second and third stage permeation trains to the existing low CO2 recovering Ceramic Inorganic membranes. The Inorganic Ceramic membrane development involved modification of Alpha Alumina support with Gamma Alumina for improved surface area. Further modifications with Magnesium Oxide and Silicon Elastomer showed increase in the selectivity of Carbon dioxide molecules over Nitrogen, Methane, Argon, and Helium mol

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27

Das, Mita. "Membranes for olefin/paraffin separations." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37110.

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The goal of this project was to develop a mixed matrix membrane with enhanced properties for propylene/propane separations. To start with the project, one of the high performance 6FDA based polyimides was identified as the polymer matrix for the rest of the project. The chosen polymer (6FDA-6FpDA) was successfully synthesized in the laboratory. During the synthesis process the key objectives for high molecular weight and low polydispersity index polymer were identified. High molecular weight 6FDA-6FpDA was achieved via laboratory synthesis and was tested successfully. After successful synthe

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28

Williams, Steffan Richard. "Recovery of small organics from natural sources using membrane technology." Thesis, Swansea University, 2015. https://cronfa.swan.ac.uk/Record/cronfa43185.

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29

Lydon, Megan Elizabeth. "Properties of inorganically surface-modified zeolites and zeolite/ polyimide nanocomposite membranes." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49069.

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Mixed matrix membranes (MMMs) consisting of a polymer bulk phase and an inorganic dispersed phase have the potential to provide a more selective membrane because they incorporate the selectivity of a zeolite dispersed phase while maintaining the ease of use of a polymer membrane. A critical problem in MMM applications is control over the polymer-zeolite interface adhesion during fabrication which can detrimentally impact membrane performance. In this work, MgOxHy (1≤x≤2, 0≤y≤2) nanostructures have been grown on pure-silica MFI and aluminosilicate LTA zeolites through four surface deposition t

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30

Wicaksana, Filicia School of Chemical Engineering &amp Industrial Chemistry UNSW. "Submerged hollow fibre membranes in bubbling systems." Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 2006. http://handle.unsw.edu.au/1959.4/25998.

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This study focuses on the optimisation of submerged hollow fibre membrane performance by analysing the role of air sparging on the reduction of membrane fouling. In submerged hollow fibre membranes, rising bubbles have been shown to induce shear, liquid movement and fibre displacement. The interaction between fibre movement induced by bubbling and the microfiltration performance was assessed for various parameters (fibre tightness, fibre length, fibre diameter, air flowrate, nozzle size, and feed concentration). A model feed of yeast suspension and a series of isolated fibres were used. The fi

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31

Diamond, Geoffrey Graham. "Organically templated inorganic membranes for gas separation." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/3071/.

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This work is an attempt to develop inorganic gas separation membranes for the purposes of separating high temperature binary gaseous mixtures. Carbon dioxide and nitrogen mixtures are the focus of this work but other mixtures could be used. The membrane synthesis route is derived from the sol-gel technique. It relies upon micropores being produced within the membrane and this is accomplished by the thermal removal of organic ligands (the "templates"). The thermal stability and structural evolution with temperature of these materials has been characterised with TGA, DTA, FTIR, 13C CP MAS NMR 11

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32

Lin, Lin. "On the Generation and Detection of Ultrasonic Plate Waves in Microporous Polymeric Material." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/LinL2003.pdf.

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33

Schneider, Markus. "Applications of hydrophobic porous membranes in mammalian cell culture technology /." [S.l.] : [s.n.], 1995. http://library.epfl.ch/theses/?nr=1412.

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34

Harmzen, Elrika. "Study of nanofibrous membranes for application in post harvest technology." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86771.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Grapes are lost annually due to spoilage by Botrytis cinerea. Botrytis cinerea is currently controlled using fungicides and SO2 fumigation in storage rooms but with limited success. Although these techniques have been used for decades they have been associated with numerous of disadvantages. Fungicides are restricted from being used during storage due to legislation and toxicity of the fungicides present on the surface of the berries. SO2 fumigation does not kill the dormant infections present inside the grape tissue and if the

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35

Carruthers, Seth Blue. "Integral-skin formation in hollow fiber membranes for gas separations." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036162.

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36

Sejour, Hensley. "Investigation of Dithiolenes for Propylene/Propane Membrane Separations." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19697.

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Polyimide membranes containing nickel dithiolenes were investigated for the separation of propylene and propane. Permeation and sorption experiments were conducted as well thermal property analyses. Results indicate that the dithiolene has an antiplasticizing effect on the polymers studied. Upon addition of the dithiolene there is a subsequent reduction in the permeability coefficient and the permeability selectivity remains relatively unchanged. There is some evidence of increases in solubility selectivity, but a larger decrease in diffusivity selectivity results in a decrease in the perm

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37

Svang-Ariyaskul, Apichit. "Chiral separation using hybrid of preferential crystallization moderated by a membrane barrier." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33909.

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The major innovation of this work is an establishment of a novel chiral separation process using preferential crystallization coupled with a membrane barrier. This hybrid process was proved to be promising from a significant increase in product yield and purity compared to existing chiral separation processes. This work sets up a process design platform to extend the use of this hybrid process to a separation of other mixtures. This novel process especially is a promising alternative for chiral separation of pharmaceutical compounds which include more than fifty percent of approved drugs wor

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38

Martula, David Stefan. "Coalescence-induced coalescence in polymeric membrane formation /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004333.

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39

Troup, Gregory Marshall Wrenn Steven Parker Dr. "Fluorescence investigation of laterally phase-separated cholesterol rich domains in model lipid membranes using the membrane probe 1-myristoyl-2-[12-[(5-dimethylamino-1-naphthalenesulfonyl)amino]dodecanoyl]-sn-Glycero-3-phosphocholine (A) /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/345.

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40

Elharati, M. A. "Poly(vinyl alcohol) / polyamide thin-film composite membranes." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2105.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: The aim of this study was to modify the surface of polyethersulfone (PES) ultrafiltration (UF) membranes to produce a more hydrophilic membrane by cross-linking poly(vinyl alcohol) (PVA) with sodium tetraborate (Na2B4O7.10H2O) (SB) on the surface. Key preparation factors were identified as PVA molecular weight, concentrations of the PVA and SB, cross-linking reaction time, number of coatings and the mode of coating. The effect of these factors on the membrane performance (salt retention and perme

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41

Perera, Dehiwalage Harshani Nimalika. "Thin film composite membranes for desalination." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709429.

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42

Ji, Jiang. "Fabrication and photochemical surface modification of photoreactive thin-film composite membranes and model development for thin film formation by interfacial polymerization /." *McMaster only, 1996.

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43

Haryadi, Haryadi Chemistry Faculty of Science UNSW. "Porous hybrid organic-inorganic silica materials: preparation, structural and transport properties." Awarded by:University of New South Wales. School of Chemistry, 2005. http://handle.unsw.edu.au/1959.4/28806.

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The aim of this project was to prepare a series of silica materials based on sol-gel processing of alkoxysilanes using glucose and glycerol as templates for potential applications in membrane design for pervaporation. The materials were characterized using structural and dynamic techniques to gain information about the effect of the templates on the formation of micro- and mesoporous silicates. The interaction between templates and silica matrices were investigated using FTIR, Raman Spectroscopy, Solid State NMR Spectroscopy, Physisorption and SEM. Close contact between templates and silica ne

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Garcia-Aleman, Jesus Dickson James M. "Mathematical modeling of the pressure-driven performance of McMaster pore-filled membranes /." *McMaster only, 2002.

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Lau, Pui Sze. "Influence of membrane chemistry on transport property /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?CENG%202002%20LAUP.

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46

Lai, Sau Man. "Fabrication of zeolite microsystems and their applications /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?CENG%202003%20LAI.

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Leung, Adrian Yat Lai. "Fabrication and properties of zeolitic microchemical systems /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CENG%202004%20LEUNG.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 140-152). Also available in electronic version. Access restricted to campus users.

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48

Tabarizadeh, Elham. "PDMS-based membranes for dehydration of Triethylene glycol using pervaporation technology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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This thesis is relying on membrane separation technology and it seeks to find an appropriate membrane to use in pervaporation setup for the subsea regeneration of triethylene glycol (TEG) in natural gas dehydration. Although some effort have been spent on membrane absorption for gas dehydration with glycols, there is still a lack of information about TEG dehydration using pervaporation technology with different membranes, therefore experimental data is needed to assess the feasibility of using membrane pervaporation for regeneration of TEG for subsea condition. In the present work, an experi

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49

Patterson, Brian Clay. "Viologen-mediated electron transfer across dihexadecylphosphate bilayer membranes /." Full text open access at:, 1990. http://content.ohsu.edu/u?/etd,238.

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Dehaney-Steven, Zachary Alexander. "Development and testing of mixed-phase oxygen transport membranes." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/16807.

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Perhaps mankind's most urgent challenge at present is anthropogenic climate change, with the associated sea-level rise and desertification set to produce major losses of arable land and living space, as well as loss of life. The key to preventing the worst effects of AGW lies in limiting humanity's emissions of the greenhouse gas carbon dioxide, of which the vast majority comes from the burning of fossil fuels such as coal, oil and natural gas. However, fossil fuels are embedded in all of the world's economies, responsible for almost all of the provision of electrical power and transport, maki

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