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Tesi sul tema "Nanofiltration"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Makowski, Marcin. "Solvent nanofiltration for purifying pharmaceuticals." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/29227.

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Abstract (sommario):
The projections recently published by the United Nations (UN) suggest that the global population may reach 8.9 billion people by the year 2050. Life expectancy is assumed to rise constantly with no upper limit and by the year 2100 is expected to vary from 66 to 97 years. As the population ages the demand for effective medicines is rising. At the same time the pharmaceutical industry keeps applying pressure to shorten development timelines for new chemical entities, so that new medicines can reach patients much faster. In the development and manufacturing of drugs the purification steps often c
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2

Welfoot, J. St J. "Predictive modelling of membrane nanofiltration." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639377.

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Abstract (sommario):
The main objective of this work was to develop predictive models for nanofiltration (NF) membrane processes. A one-parameter model (pore radius) for uncharged solute rejection has been developed. The good agreement between the proposed model and experimental data confirmed that uncharged solute rejection is well described by continuum models. A two-parameter model (pore radius and membrane charge) for electrolyte rejection has also been developed. Dielectric exclusion was included as an energy barrier to ion partitioning into the pores, the reassessment of which using NaCl rejection at the mem
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3

Cluff, C. Brent. "Slowsand/Nanofiltration of Surface Water." Arizona-Nevada Academy of Science, 1991. http://hdl.handle.net/10150/296460.

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From the Proceedings of the 1991 Meetings of the Arizona Section - American Water Resources Association and the Hydrology Section - Arizona-Nevada Academy of Science - April 20, 1991, Northern Arizona University, Flagstaff, Arizona<br>Since the spring of 1988 the University of Arizona has conducted nanofiltration research. The major emphasis has been the treatment of both Colorado River Water and municipal effluent. The work has been sponsored by the John F. Long Foundation Inc. and the Consolidated Water Utilities, Phoenix Az. Nanofiltration is a low pressure form of reverse osmosis. It opera
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4

Tanardi, Cheryl Raditya. "Organically-modified ceramic membranes for solvent nanofiltration : fabrication and transport studies." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS259/document.

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La nanofiltration (NF) est un procédé applicable à la récupération des solvants organiques. Une membrane chimiquement stable est alors requise pour résister aux solvants organiques. Cette thèse traite de la préparation de membranes NF chimiquement stables par greffage de substrats céramiques mésoporeux et de l'étude de leurs propriétés de transport des solvants et des solutés. Dans le chapitre 1, l'état de l'art sur les techniques de greffage est présenté ainsi que celui sur le comportement au transport des membranes NF résistantes aux solvants.Dans les chapitres 2 et 6, des membranes d'ultraf
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5

Da, Silva Burgal Joao Porfirio. "Development of poly (ether ether ketone) nanofiltration membranes for organic solvent nanofiltration in continuous flow systems." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/43328.

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Organic solvent nanofiltration (OSN) is an energy saving technology that can replace more energy demanding separation technologies, such as evaporation and distillation. Nevertheless, OSN membranes that can withstand high temperature conditions as well as acidic or basic conditions are lacking on the market. In this thesis a poly(ether ether ketone) (PEEK) membrane is investigated for its suitability for OSN applications using polar aprotic solvents, such as DMF and THF, high temperatures, and basic/acidic conditions. By studying four grades of PEEK polymer powder from two different brands (VE
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6

Karabacak, Asli. "Sulphate Removal By Nanofiltration From Water." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612748/index.pdf.

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ABSTRACT SULPHATE REMOVAL BY NANOFILTRATION FROM WATER Karabacak, Asli M.Sc., Department of Environmental Engineering Supervisor: Prof. Dr. &Uuml<br>lk&uuml<br>Yetis Co-advisor: Prof. Dr. Mehmet Kitis December 2010, 152 pages Excess sulphate in drinking water poses a problem due to adverse effects on human health and also due to aesthetic reasons. This study examines the nanofiltration (NF) of sulphate in surface water using a laboratory cross-flow device in total recycle mode. In the study, three NF membranes, namely DK-NF, DL-NF and NF-270, are used. The influence of the main operat
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7

Artuğ, Gamze. "Modelling and simulation of nanofiltration membranes." Göttingen Cuvillier, 2007. http://d-nb.info/986774685/04.

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8

Wong, Hau To. "Solvent nanofiltration for organometallic catalysed reactions." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429120.

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9

Mohammad, A. W. "Predictive models for nanofiltration membrane processes." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638212.

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Abstract (sommario):
The main objective of this work was to develop a predictive model for nanofiltration (NF) membrane processes. This was accomplished by development of a model which describes the transport of electrolytes in NF membranes in terms of three mechanisms: diffusion, convection and electromigration. The model includes the description of concentration polarisation for binary and more complex mixtures of charged electrolytes. The application and utility of the model were studied by identifying the key characteristics of NF membranes, modelling of a selected process, validation using experimental data a
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10

Cheng, S. "Improved nanofiltration membranes by self-assembly." Thesis, Swansea University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636243.

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Abstract (sommario):
Charged ultrafiltration (UF)/nanofiltration (NF) membrane plays a very important role in membrane separation. Thus, the aim of the present study was to improve charged UF and NF membranes for increased application within the process, pharmaceutical and food industries. The main objectives of this work were to investigate the preparation, modification, characterisation and application of a group of charged UF/NF membranes. Substrate membranes were prepared with polyehterimide (PEI) and sulfonated poly(ether ether ketone) (SPEEK). The self-assembly deposition of polyelectrolytes on the membrane
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11

Stawikowska, Joanna. "Characterisation of organic solvent nanofiltration membranes." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/14732.

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Abstract (sommario):
Interests in application of organic solvent nanofiltration (OSN) technology based on synthetic membranes to molecular separation processes have been growing rapidly in recent years. The main classes of OSN flat sheet polymeric membranes are integrally skinned asymmetric (ISA) and thin film composite (TFC) membranes. A general goal of OSN membrane research is to improve membrane performance for specific non-aqueous applications, or to develop new separation processes. Most of the time the research is performed via trial–and–error methods, leading to extension of development time and increase of
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12

See, Toh Yoong Hsiang. "Molecular separations with organic solvent nanofiltration." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11320.

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This thesis firstly describes the application of organic solvent nanofiltration (OSN) in the recycle of asymmetric hydrogenation catalysts through the retention of the (often) larger catalyst whilst allowing the smaller products to penneate. This improves the catalyst tum over number (TON) and the further addition of the ionic liquid (IL) CyPhoslOl markedly improves the enantiomeric excess in the asymmetric hydrogenation of dimethyl itaconate using Ru-BINAP. The high molecular weight of the catalyst and IL allows them to be simultaneously recycled using an OSN membrane. Although this work iden
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13

Cluff, C. Brent, Charles P. Gerba, and Gary L. Amy. "Slow Sand/Nanofiltration of Surface Water." Water Resources Research Center. The University of Arizona, 1990. http://hdl.handle.net/10150/306475.

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Paper presented at "Membranes For Drinking Water Treatment Conference", Environmental Protection Agency, Cincinnati, OH, August 6, 1990.<br>Introduction: Through the studies published in Drinking Water and Health (1977) the nation has become more aware of the carcinogenic nature of the byproducts of disinfection such as trihalomethanes. Trihalomethanes are formed when the disinfectant chlorine reacts with the precursors, humic and fluvic acids that are naturally occuring in all surface water. The Environmental Protection Agency (EPA) has set a minimum contaminent level of 100 ppb on THM's that
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14

Shirley, Jason Dennis. "Anomalous rejection ratios in nanofiltration experiments." Thesis, Swansea University, 2008. https://cronfa.swan.ac.uk/Record/cronfa42300.

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Abstract (sommario):
Nanofiltration by its nature is used to concentrate material. It has been found that varying the solute feed concentration had an effect on the rejection of amino acids and polar molecules. The rejection of these organic solutes has been shown to increase with concentration during nanofitration experiments for a NTR 7450 membrane. The rejection of glycine increased from 29.4% to 72.2% for a concentration of 0.004 g/1 and 4.0 g/1 respectively. Similar increases in rejection with respect to concentration were observed for glutamine and glutamic acid, as well as for glucose, sucrose and raffinose
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15

Low, Jian-Shen. "A study of organic solvent nanofiltration." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/35066.

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This thesis is concerned with the principal features of solvent resistant nanofiltration (SRNF), and in particular its potential in fuel processing. In the recent and more established literature, dense polydimethylsiloxane (PDMS) has been identified as a potential SRNF membrane with separation properties at a molecular level. This thesis investigates the transport and separation mechanisms of dense PDMS membranes in SRNF applications relating to the filtration of organic solvents (mixtures are mixed to simulate fuel). Simulated fuels were created which comprised representative organic solvents
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16

Lakhchaf, Nadia. "Nanofiltration d'ions et de complexes en solution. Application au traitement d'effluents nickelés par couplage complexation, nanofiltration, électrolyse." Montpellier 2, 1996. http://www.theses.fr/1996MON20122.

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La these decrit l'etude d'un procede couplant la nanofiltration et l'electrolyse pour l'elimination et le recyclage de cations de metaux lourds contenus dans des solutions diluees. En effet, la filtration membranaire permet d'obtenir d'une part une solution epuree et d'autre part un concentrat qui peut etre electrolyse pour recuperer le metal a l'etat solide. L'objectif fixe a ete de determiner les conditions de faisabilite d'un tel procede. La bibliographie liee a notre etude est regroupee en debut de memoire. Dans un premier chapitre sont presentes les effluents nickeles vises par le procede
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17

Jakobs, Dirk. "Stofftransport durch Nanofiltrationsmembranen unter Berücksichtigung von Biofilmen /." Aachen : Shaker, 2001. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009461355&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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18

Schrader, Guillo Alexander. "Direct nanofiltration of wastewater treatment plant effluent." Enschede : University of Twente [Host], 2006. http://doc.utwente.nl/55981.

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19

Ogutverici, Abdullah. "Triclosan Removal By Nanofiltration From Surface Water." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615617/index.pdf.

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Nowadays, organic pollutants occurring in surface waters have raised substantial concern in public. Triclosan (TCS) is one of the antimicrobial agents which are utilized in both domestic and industrial application. In this study nanofiltration (NF) of TCS in surface water was investigated. Laboratory scale cross-flow device is operated in total recycle mode and DK-NF and DL-NF membranes were used. Kesikk&ouml<br>pr&uuml<br>Reservoir (Ankara) water was used as raw water. Effect of natural organic matter (NOM) content of raw water on TCS removal is searched through addition of humic acid (HA) in
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20

Roy, Yagnaseni. "Modeling nanofiltration for large scale desalination applications." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100096.

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Abstract (sommario):
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 91-94).<br>The Donnan Steric Pore Model with dielectric exclusion (DSPM-DE) is implemented over flatsheet and spiral-wound leaves to develop a comprehensive model for nanofiltration modules. This model allows the user to gain insight into the physics of the nanofiltration process by allowing one to adjust and investigate effects of membrane charge, pore radius, and other membrane characteristics. The study shows
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21

Nada, Tariq. "Characterisation of nanofiltration membranes for sulphate rejection." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5194/.

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Abstract (sommario):
Nanofiltration (NF) membranes are used for a range of industrial applications one of which is for the removal of the sulphate constituent in seawater. This is a mature activity for the treatment of seawater that is to be injected into oil reservoirs in the offshore oil/gas industry. Such sulphate removals have also been the subject of much interest, as a pretreatment strategy, in seawater desalination plants that is either utilising thermal technology or reverse osmosis. Nevertheless, there is a need for robust criteria, such as the comparative permeate flux and sulphate rejection, of selectin
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22

Silva, Marta Sofia Fragoso da. "Polyimide and polyetherimide organic solvent nanofiltration membranes." Master's thesis, FCT - UNL, 2007. http://hdl.handle.net/10362/1133.

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Integrally asymmetric skinned Lenzing P84 and Matrimid 5218 polymide membranes and Ultem 1000 polyetherimide membranes were prepared. Crosslinking of membranes using aliphatic diamines resulted in marked improvement in chemical stability. This however resulted in a decline in flux with only Lenzing P84 demonstrating good flux in DMF. Further variation of membrane dope parameters and operating conditions allowed for good control of the MWCO of membranes made from Lenzing P84. SEM pictures of Lenzing P84 membranes revealed a significant difference in membranes morphology. The presence of m
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23

Aljohani, Naser Hamzah. "Characterisation and prediction of nanofiltration charge effects." Thesis, Swansea University, 2015. https://cronfa.swan.ac.uk/Record/cronfa42646.

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Abstract (sommario):
Membrane processes have many industrial applications such as desalination, water treatment, biotechnology, food industry, pharmaceutical and power generation. The advantages of membrane processes include high selectivity, low operating costs and energy consumption. Membrane charge plays an important role in the membrane separation of ionic species. Therefore, understanding the interaction between ions and membrane charge is essential to improve the performance of the separation. This interaction is a function of pH concentration and depends on membrane type. The objective of this thesis was to
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24

Zhou, Mingyan, Ke Wu, James E. Kilduff, and Georges Belfort. "Modeling organic molecule transport through nanofiltration membranes." Diffusion fundamentals 16 (2011) 37, S. 1-2, 2011. https://ul.qucosa.de/id/qucosa%3A13772.

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25

Marchetti, Patrizia. "Organic solvent nanofiltration in the peptide industry." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11651.

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Abstract (sommario):
In recent years the application of membrane technology to molecular separation processes has stimulated interest and showed great potential in a number of industrial fields. Ultrafiltration membranes have been successfully applied to downstream separation of therapeutically active peptides, to overcome some of the limitations of the conventional techniques in terms of costs, scale-up, selectivity and solvent recovery. In this research project, Organic Solvent Nanofiltration of peptide solutions is studied, and this understanding is applied to the development of innovative membrane-based purifi
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26

Zhou, Mingyan, Ke Wu, James E. Kilduff, and Georges Belfort. "Modeling organic molecule transport through nanofiltration membranes." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184966.

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27

Gupta, Abhinaba. "Polydicyclopentadiene : a novel organic solvent nanofiltration membrane." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3460.

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Macroscopic, hollow thimbles were synthesized from dicyclopentadiene with the Grubbs second generation catalyst at a monomer:catalyst loading of 10,000:1. A series of Buchwald-Hartwig and Sonogashira coupling reactions were completed on the interior of the thimbles followed by extraction of the product to the exterior using hexane. In all examples, palladium was retained by the membranes at ≥99.9% levels. Both polar and apolar molecules with molecular weights from 101 to 583 g mol-1 permeated these thimbles with values for flux of 10-5 to 10-6 mol cm-2 h-1, but selected molecules did not perme
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28

Ouali, Sara. "Étude de la dépollution des eaux par couplage des procédés : modélisation et hydrodynamique." Electronic Thesis or Diss., Rennes 1, 2022. http://www.theses.fr/2022REN1S097.

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Abstract (sommario):
Cette thèse a pour but de développer une approche innovante et un système avancé intégrant "membrane et oxydation" pour le traitement des eaux. La principale innovation de cette étude réside dans l’utilisation d’une configuration monophasique où l’ozone est solubilisé à forte concentration en amont de la membrane dans une eau pure ou à faible demande en ozone. Le choix des membranes s’est porté sur des membranes organiques qui sont moins coûteuses que les membranes céramiques (mais cependant moins résistantes chimiquement). La première partie de ce travail s’est donc focalisée sur la compatibi
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29

Bhanushali, Dharmesh S. "SOLVENT-RESISTANT NANOFILTRATION MEMBRANES: SEPARATION STUDIES AND MODELING." Lexington, Ky. : [University of Kentucky Libraries], 2002. http://lib.uky.edu/ETD/ukychen2002d00059/DISSERTATION.pdf.

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Thesis (Ph. D.)--University of Kentucky, 2002.<br>Title from document title page. Document formatted into pages; contains xvii, 268 p. : ill. Includes abstract. Includes bibliographical references (p. 261-267).
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30

Agbekodo, Koffi Marcus. "Elimination par nanofiltration des composés organiques d'une eau de surface prétraitée : caractérisation du carbone organique dissous avant et après nanofiltration." Poitiers, 1994. http://www.theses.fr/1994POIT2252.

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Les principaux objectifs de cette etude etaient de mesurer l'efficacite de la nanofiltration en terme d'elimination de la matiere organique naturelle, d'identifier les constituants majoritaires du fond refractaire organique du permeat et de tenter de comprendre les principaux mecanismes de retention de quelques composes organiques simples par nanofiltration. Les resultats de nos travaux, qui ont eu lieu en partie sur site industriel et en partie en laboratoire, ont montre que la nanofiltration est un excellent procede qui permet a partir de l'eau filtree sur sable de l'usine de mery/oise pretr
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31

Toutianoush, Ali. "Polyelektrolyt-Multischichtmembranen für Pervaporation, Dialyse, Nanofiltration und Reversosmose." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971864039.

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32

Chaturvedula, Durgaprasad. "Treatment of Mililani I Well Water By "Nanofiltration"." Thesis, Water Resources Research Center, University of Hawaii at Manoa, 1995. http://hdl.handle.net/10125/21918.

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Abstract (sommario):
Two nanofiltration membranes, a thin film composite (TFC) membrane, a cellulose triacetate (CTA) membrane, were tested as pretreatment alternatives to extend the effective life of GAC at Mililani Wells I, Oahu, Hawaii. TFC membranes achieved excellent 1,2,3-trichloropropane (TCP), and 1,2-dibromo-3-chloropropane (DBCP) removal percentages whereas CTA membranes performed very poorly. TFC membranes showed promising signs of reducing total organic carbong (TOC) from the nanofiltration unit influent. In Mililani waters, only TCP is present in large amounts. It is suggested that further studies sho
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33

Wijaya, Julie E. "Formation and characterization of solvent resistant nanofiltration membranes." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27081.

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In this work, a novel approach for preparing nanofiltration membranes using poly(amide imide) (TorlonRTM)/Chitosan composites by coating the Chitosan solution on top of the Torlon base membrane and subsequently curing and neutralization with sodium bicarbonate (NaHCO3) has been developed. In general, TorlonRTM/Chitosan composite nanofiltration membranes were found to be stable in aqueous medium and when contacted with the solvents. A uniform Chitosan dense layer was successfully coated on the base membrane, which reduced the effect of chemical degradation of the membrane. Low permeability of s
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34

Harrison, Catherine J. "Bench-scale testing of seawater desalination using nanofiltration /." abstract and full text PDF (free order & download UNR users only), 2005. http://0-wwwlib.umi.com.innopac.library.unr.edu/dissertations/fullcit/1433104.

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Thesis (M.S.)--University of Nevada, Reno, 2005.<br>"August, 2005." Includes bibliographical references (leaves 80-84). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2005]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.
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35

Wooten, Mary K. "NANOFILTRATION MEMBRANES FROM ORIENTED MESOPOROUS SILICA THIN FILMS." UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/28.

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The synthesis of mesoporous silica thin films using surfactant templating typically leads to an inaccessible pore orientation, making these films not suitable for membrane applications. Recent advances in thin film synthesis provide for the alignment of hexagonal pores in a direction orthogonal to the surface when templated on chemically neutral surfaces. In this work, orthogonal thin film silica membranes are synthesized on alumina supports using block copolymer poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) as the template. The orthogonal pore structure
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Moitsheki, Lesego Johannes. "Nanofiltration : fouling and chemical cleaning / Lesego Johannes Moitsheki." Thesis, North-West University, 2003. http://hdl.handle.net/10394/391.

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Abstract (sommario):
The challenge of providing developing rural areas in South Africa with sufficient potable water is substantial. North West Province, among others, is water-stressed, semi-arid, and largely rural with a high dependence on groundwater as a strategic resource. Some parts of the province are having poor water quality which ends up affecting households, farming and livestock. The aim of this study is to evaluate the performance of nanofiltration (NF) membranes in detrimental ion (fluoride, nitrate and sulphate) rejection and to monitor fouling on membranes with their subsequent chemical cleaning. F
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37

Diaper, Clare. "Low pressure nanofiltration membranes for dyehouse effluent treatment." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284922.

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38

ALVES, THAIS DE LIMA. "INORGANIC FOULING IN NANOFILTRATION MEMBRANES DURING DESULPHATATION PROCESS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9206@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>Um problema inerente ao processo de separação por membranas, mais especificamente a nanofiltração( NF) é a perda de eficiência das membranas com o tempo de operação do sistema, que se deve, em grande parte, ao depósito ou adsorção de material na superfície e/ou poros das membranas. O desenvolvimento de incrustações faz com que o fluxo permeado diminua muito e torna necessário regimes freqüentes de limpeza que ocasionam uma acentuada diminuição na vida útil da membrana. Este e
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39

Sdika, Didier. "La nanofiltration appliquée à la fabrication d'eau potable." Paris 5, 1995. http://www.theses.fr/1995PA05P105.

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40

Zhu, Haochen. "Multiscale modelling of transfer mechanisms through nanofiltration membranes." Rennes 1, 2011. http://www.theses.fr/2011REN1S070.

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Abstract (sommario):
Although nanofiltration (NF) has attracted increasing attention over the recent years, its current industrial applications are still limited compared to the great potentialities of this clean process. The major reason is that the physical phenomena involved in separation at the nanoscale are still poorly understood and the relative success of current NF models can be attributed in large part to the fact that key properties of membranes (like their surface charge density) and confined fluids (like the dielectric constant of the solution in the membrane pores) are most often fitting parameters t
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41

Umpuch, Chakkrit. "Séparation et purification d'un acide organique par nanofiltration." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1142/.

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L'objectif de ce travail a consisté à déterminer dans quelle mesure la modification de la composition ionique pouvait améliorer la séparation glucose/lactate par nanofiltration. Plus précisément, il s'agissait d’évaluer l'impact de l'addition d'un électrolyte sur la sélectivité de la séparation. En effet, l'influence de la composition ionique sur les rétentions d'espèces neutres et chargées en nanofiltration est gouvernée par des mécanismes différents. L'influence de la composition ionique sur les rétentions du glucose et du lactate a été étudiée en solutions binaires (glucose/électrolyte et l
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Chevalier, Stéphanie. "Modélisation mathématique des mécanismes de séparation en nanofiltration." Bordeaux 1, 1999. http://www.theses.fr/1999BOR10529.

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La nanofiltration est un procede membranaire utilise dans des secteurs aussi divers que l'industrie alimentaire, automobile ou pharmaceutique. La modelisation des processus de transfert et de separation de la matiere a travers les nanofiltres est delicate car ceux-ci resultent de la combinaison de nombreux phenomenes physico-chimiques complexes. Les principales etapes de ce travail sont les suivantes : - description des principaux mecanismes de transport et de retention des especes en solution aqueuse par une membrane solide a travers laquelle on impose une difference de pression hydrostatique
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Soroko, Iwona. "Polyimide organic solvent nanofiltration membranes-formation and function." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6882.

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This thesis offers a comprehensive study that analyses the relationship between polyimide (PI) organic solvent nanofiltration (OSN) membrane formation parameters, membrane structure, and membrane functional performance. The dissertation starts by addressing the structure-related problem of macrovoid formation, which arises when more open membranes are prepared. Incorporation of TiO2 nanofillers into the membrane matrix results in macrovoid-free, organic/inorganic PI/TiO2 mixed matrix membranes without compromising rejection. Subsequently, a detailed analysis of the membrane formation process,
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Loh, Xun Xing. "Polyaniline membranes for use in organic solvent nanofiltration." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/11347.

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Lim, King Zheng. "Separation of solvent from microalgal hydrocarbon using nanofiltration." Thesis, Lim, King Zheng (2016) Separation of solvent from microalgal hydrocarbon using nanofiltration. Honours thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/33944/.

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The need for searching an alternative technology to separate solvent efficiently from the post-extraction process in the algae fuel production process has been long researched for, and little to no convincing findings were found to rectify the current energy crisis. This report aims to evaluate the viability of implementing nanofiltration technology that could replace the use of a distillation column in the post-extraction process. Aspen Plus was used to assess the thermodynamic feasibility of utilising chemical process unit operations. This includes the following: investigation of the effect
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Altun, Veysi. "Solvent stable UV and EB cross-linked polysulfone-based membranes." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30393/document.

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La part des technologies membranaires en tant que technique de séparation a rapidement augmenté au cours de ces dernières années grâce à leur large gamme d'applications. Le marché en pleine expansion nécessite des matériaux polymères avancés qui montrent une résistance accrue vis-à-vis du gonflement et de la plastification en séparation de gaz (GS) ou vis-à-vis de solvants forts et des conditions de pH extrême en nanofiltration en milieu organique (SRNF). Aujourd'hui, la réticulation apparait comme une technologie prometteuse pour répondre à ces nouveaux besoins. La réticulation chimique est l
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Ellouze, Fatma. "Purification et fractionnement de mélange de cyclodextrines par procédés membranaires." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20177.

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Cette étude a été consacrée à la purification et au fractionnement de mélanges de cyclodextrines par procédés membranaires (NF, UF). Les cyclodextrines (CD) sont des oligosaccharides cycliques constituées de 6 à plus de 60 unités de glucose (CD6-CD60). Elles sont synthèsées en mélange à partir de la bioconversion de l'amidon. Dans un premier temps, la complexation ultrafiltration a été appliquée pour séparer la CD6 et la CD7. Au cours de cette étude, différents paramètres comme la pression, le rapport stœchiométrique entre CD et agent complexant et le rapport massique entre CD ont été étudiés.
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Idil, Mouhoumed Elmi. "Étude des propriétés de charge et de transport de membranes de nanofiltration." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S007/document.

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Aujourd'hui, la nanofiltration (NF) est perçue comme un procédé de séparation efficace et propre permettant d’extraire ou de concentrer des solutés ioniques ou neutres. Son développement à l’échelle industrielle n’est cependant pas encore optimal car les différents mécanismes de séparation sont encore mal compris. Cette thèse a porté d’une part sur l’étude des propriétés charge de surface des membranes de NF/OI et d’autre part sur les mécanismes de transport à travers des membranes de NF. Il a tout d’abord été montré, grâce à des mesures électrocinétiques réalisées sous atmosphère contrôlée, q
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Hajarat, Rasha. "The use of nanofiltration membrane in desalinating brackish water." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/the-use-of-nanofiltration-membrane-in-desalinating-brackish-water(870d69f0-073d-4474-b591-e9fe85a92af7).html.

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Stolp, Wynand. "Nickel recovery from spent electrolyte by nanofiltration / Wynand Stolp." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1618.

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