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Tesi sul tema "Membrane separation"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

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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2

Wang, Lei. "Cyclic membrane gas separation processes." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0291/document.

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Ce travail traite une investigation systématique des performances du procédé membranaire cyclique par séparation gazeuse. Premièrement, l'état de l'art du procédé membranaire cyclique, les problèmes techniques et la modélisation du transfert à travers la membrane ont été exposés. Deuxièmement, les études théoriques et expérimentales existantes sur le procédé cyclique sont passées en revue. Selon la durée de pression haute et sa fraction dans un cycle, ce genre d'opération est divisé en deux classes: classes courte et longue. D'après cette classification, une analyse systématique de l'intérêt p

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3

Lycon, David Steven. "Flux enhancement and fouling reduction in a centrifugal membrane process." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/NQ44796.pdf.

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4

Xu, Lili. "Electrically tuneable membranes : revolutionising separation and fouling control for membrane reactors." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715263.

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The overall aim of this research is to develop unique conducting polyaniline (PANI) membranes that can be electrically tuned to achieve different fluxes and selectivity. The target application is in a tuneable membrane reactor, where these membranes allow the fouling layer to be pushed off/through membranes by application of external potential. To achieve this, several different types of PANI membranes were examined. The permeation properties of HCl-doped PANI membranes can be modified electrically to produce in-situ tuneable separations. However, acid dopant leaching and membrane brittleness

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5

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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6

Najarian, Siamak. "Membrane separation methods in medical engineering." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296835.

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7

Ye, Pengcheng. "Zeolite Membrane Separation at Low Temperature." Doctoral thesis, Luleå tekniska universitet, Kemiteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17447.

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The energy consumption of separation processes accounts for a large part of the total energy consumption in chemical industry. Membrane separation processes require much less energy than the currently used thermally driven separation processes and could therefore reduce energy consumption in industry considerably. Today, most commercially available membranes are organic polymeric membranes. Inorganic zeolite membranes have several superiorities over polymeric membranes, e.g., higher flux and selectivity, higher chemical and thermal stability, and thus have great potential for a variety of gas

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8

Lloyd, Michael C. "Novel materials for membrane separation processes." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9680/.

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The aim of this work was to synthesise a series of hydrophilic derivatives of cis-1,2-dihydroxy-3,5-cyclohexadiene (cis-DHCD) and copolymerise them with 2-hydroxyethyl methacrylate (HEMA), to produce a completely new range of hydrogel materials. It is theorised that hydrogels incorporating such derivatives of cis-DHCD will exhibit good strength and elasticity in addition to good water binding ability. The synthesis of derivatives was attempted by both enzymatic and chemical methods. Enzyme synthesis involved the transesterification of cis-DHCD with a number of trichloro and trifluoroethyl este

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9

Kratochvil, Adam Michal. "Thickness dependent physical aging and supercritical carbon dioxide conditioning effects on crosslinkable polyimide membranes for natural gas purification." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29678.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Koros, William; Committee Member: Beckham, Haskell; Committee Member: Eckert, Charles; Committee Member: Henderson, Cliff; Committee Member: Meredith, Carson. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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10

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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11

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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12

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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13

Araujo, Paulo Jardel Pereira. "Avaliação da permeabilidade em membrana tubular de TiO2/AL2O3 dos constituintes do sistema reacional heterogêneo para produção de biodiesel." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266802.

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Orientadores: Teresa Massako Kakuta Ravagnani, Leila Peres<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-18T23:18:07Z (GMT). No. of bitstreams: 1 Araujo_PauloJardelPereira_D.pdf: 15740528 bytes, checksum: bd5969744efcacfde55b69c10f951f33 (MD5) Previous issue date: 2011<br>Resumo: O biodiesel além de ser biodegradável e obtido de fontes renováveis, apresenta propriedades físico-químicas muito semelhantes ao diesel de petróleo, não necessitando de um novo motor para utilização do mesmo. A rota química mais comume

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14

Mokrani, Touhami. "Transport of gases across membranes." Thesis, Peninsula Technikon, 2000. http://hdl.handle.net/20.500.11838/878.

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Thesis (MTech (Chemical Engineering))--Peninsula Technikon, 2000.<br>Oxygen transport across biofilms and membranes may be a limiting factor in the operation of a membrane bio-reactor. A Gradostat fungal membrane bio-reactor is one in which fungi are immobilized within the wall of a porous polysulphone capillary membrane. In this study the mass transfer rates of gases (oxygen and carbon dioxide) were investigated in a bare membrane (without a biofilm being present). The work provides a basis for further transport study in membranes where biomass is present. The diaphragm-cell metho

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15

Danial, John Shokri Hanna. "Imaging lipid phase separation on droplet interface bilayers." Thesis, University of Oxford, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.711943.

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16

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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17

Tuan, Chik Syed Mohd Saufi. "Mixed Matrix Membrane Chromatography for Bovine Whey Protein Fractionation." Thesis, University of Canterbury. Chemical and Process Engineering, 2010. http://hdl.handle.net/10092/3647.

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Whey protein fractionation is an important industrial process that requires effective large-scale processes. Although packed bed chromatography has been used extensively, it suffers from low processing rates due to high back-pressures generated at high flow rates. Batch chromatography has been applied but generally has a low efficiency. More recently, adsorptive membranes have shown great promise for large-scale protein purification, particularly from large-volume dilute feedstocks. A new method for producing versatile adsorptive membranes by combining membrane and chromatographic resin matric

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18

Sivertsen, Edvard. "Membrane Separation of Anions in Concentrated Electrolytes." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2100.

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19

Saleh, Jehad. "A Membrane Separation Process for Biodiesel Purification." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19730.

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In the production of biodiesel via the transesterification of vegetable oils, purification to international standards is challenging. A key measure of biodiesel quality is the level of free glycerol in the biodiesel. In order to remove glycerol from fatty acid methyl ester (FAME or biodiesel), a membrane separation setup was tested. The main objective of this thesis was to develop a membrane process for the separation of free glycerol dispersed in FAME after completion of the transesterification reaction and to investigate the effect of different factors on glycerol removal. These factors incl

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20

Henderson, J. S. "Combined microfiltration and membrane-based affinity separation." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325959.

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21

Banchik, Leonardo David. "Advances in membrane-based oil/water separation." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108950.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 117-124).<br>Oil is a widespread pollutant from oil spills to industrial oily wastewater in the oil and gas, metalworking, textile and paper, food processing, cosmetics, and pharmaceutical industries. A wastewater of particular concern is produced water, an oily waste stream from hydrocarbon extraction activities. Worldwide, over 2.4 billion US gallons of produced water is generated every day.

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22

Zhou, Yi. "Membrane-Based Gas Separation For Carbon Capture." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595254659184073.

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23

Etoumi, Assma S. Abdalla. "Hybrid membrane-distillation separation for ethylene cracking." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/hybrid-membranedistillation-separation-for-ethylene-cracking(aee59d9f-61a3-4edf-8d22-0123fb6e942e).html.

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Gas separations are often required in chemical processes, e.g. air separation, ethylene production, etc. These are often challenging and costly processes because of the low temperature and high pressure needed if vapour-liquid phase separations are involved. This thesis focuses on hybrid membrane-distillation separations as an opportunity to develop more energy-efficient separation processes. In a typical ethylene plant, recovery, the separation and purification of the cracked product are economically important. The focus of this thesis is on the ‘C2splitter’ which separates the desired produc

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24

Cao, Liming. "Protein Separation with Ion-exchange Membrane Chromatography." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050405-174109/.

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25

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

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26

Sibold, Jeremias. "Phase separation of biomimetic membranes:." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-12CA-3.

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27

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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28

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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29

Wu, Dongzhu. "SUBSTRATE DESIGN AND MEMBRANE STABILITY OF MULTILAYER COMPOSITE MEMBRANE FOR CO2 SEPARATION." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1510429230811329.

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30

Aziz, Mujahid. "The recovery of copper by tubular supported liquid membranes." Thesis, Cape Peninsula University of Technology, 2006. http://hdl.handle.net/20.500.11838/894.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, Cape Town, 2006<br>During recent years, the use of liquid membranes has gained general interest in the treatment of effiuents where solute concentrations are low and large volumes of solutions should be processed, and, if possible, without generating any secondary waste. Liquid membrane processes have been proposed as a clean technology, owing to their characteristics, i.e. high specificity, low energy and utilization. Two liquid membrane processes have been used in metal recovery, which are the liquid surfact

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31

Deng, Shi. "Development of a coarse pore membrane bioreactor with in-situ membrane cleaning /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202007%20DENG.

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32

Escorihuela, Roca Sara. "Novel gas-separation membranes for intensified catalytic reactors." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/121139.

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[ES] La presente tesis doctoral se centra en el desarrollo de nuevas membranas de separación de gases, así como su empleo in-situ en reactores catalíticos de membrana para la intensificación de procesos. Para este propósito, se han sintetizado varios materiales, como polímeros para la fabricación de membranas, catalizadores tanto para la metanación del CO2 como para la reacción de síntesis de Fischer-Tropsch, y diversas partículas inorgánicas nanométricas para su uso en membranas de matriz mixta. En lo referente a la fabricación de las membranas, la tesis aborda principalmente dos tipos: orgán

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33

Xu, Liren. "Carbon molecular sieve hollow fiber membranes for olefin/paraffin separations." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50130.

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Olefin/paraffin separation is a large potential market for membrane applications. Carbon molecular sieve membranes (CMS) are promising for this application due to the intrinsically high separation performance and the viability for practical scale-up. Intrinsically high separation performance of CMS membranes for olefin/paraffin separations was demonstrated. The translation of intrinsic CMS transport properties into the hollow fiber configuration is considered in detail. Substructure collapse of asymmetric hollow fibers was found during Matrimidﾮ CMS hollow fiber formation. To overcome the perm

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34

Smith, Daniel Scott. "Investigations into electrochemical membrane separator processes." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/10262.

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35

Jee, Sang Eun. "The effect of pore dimension of zeolites on the separation of gas mixtures." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33893.

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We examined the effect of the pore dimension of zeolites on the separation of gas mixtures using atomistic simulation methods. We studied two categories of the zeolites with small pores: pore modified silicalite for H₂/CH₄separation and small pore silica zeolites for CO₂/CH₄separation. The effect of pore modification of silicalite on the H₂/CH₄separation was examined. Under some degrees of surface modification, the CH₄flux was reduced much more than the H₂flux, resulting in high ideal selectivities. The use of small pore zeolites for CO₂/CH₄separations was studied. In DDR, we showed that CO₂di

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36

HOWARD, SHAUN CHRISTOPHER. "PHASE SEPARATION IN MIXED ORGANOSILANE MONOLAYERS: A MODEL SYSTEM FOR THE DEVELOPMENT OF NOVEL MEMBRANES." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1123873986.

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37

Fouladvand, Shahpar. "Study of MFI zeolite membrane for CO2 separation." Licentiate thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59614.

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Nowadays, the need and interest for renewable sources of energy has increased. Biogas is a renewable source of energy that can be considered as a sustainable substitute for natural gas. Biogas is mainly composed of CH4 and CO2, and normally the CO2 content of the gas has to be reduced as it decreases the calorific value of the gas and it may also cause corrosion in pipes and other equipment. Most today’s technologies used for upgrading biogas have been adapted from upgrading of natural gas. However, these technologies are best suited for large scale operation; whereas, production of biogas is

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38

Ashrafizadeh, Seyed Nezameddin. "Solvent extraction and liquid membrane separation of rhodium." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37698.

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The aim of this work was to develop a viable solvent-extraction based system for the separation of rhodium (Rh) from aqueous chloride solutions. Ultimately, two different systems were developed. Kelex 100, a commercially available derivative of 8-hydroxyquinoline, was used as the extractant reagent in both of these systems. One of the systems involved the supported liquid membrane (SLM) extraction of Rh. In this system a very thin microporous "Gore-Tex" polymer sheet, impregnated with an organic solution of Kelex 100, served as the SLM. The other system involved the conversion of the chlorocom

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Shi, Xinlong. "Membrane fouling of activated sludge." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30731884.

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Næss, Live Nova. "Pd-based Membranes for Hydrogen Separation - Membrane Structure and Hydrogen Sorption and Permeation Behavior." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20867.

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Efficient separation of hydrogen from gas mixtures is a truly enabling technology for hydrogen as an energy carrier. Palladium(Pd)-based membranes are 100% selective to hydrogen, but need to be made thin, yet without defects in order for the technology to be applicable. The motivation for this work has been to examine solubility properties and surface topography for Pd-based membranes, and further elucidate the influence these parameters have on the overall hydrogen permeation capabilities. Extremely thin, defect-free Pd-alloy membranes supplied by SINTEF Materials and Chemistry were investiga

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Witkowski, Thomas, Rainer Backofen, and Axel Voigt. "The influence of membrane bound proteins on phase separation and coarsening in cell membranes." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-139226.

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A theoretical explanation of the existence of lipid rafts in cell membranes remains a topic of lively debate. Large, micrometer sized rafts are readily observed in artificial membranes and can be explained using thermodynamic models for phase separation and coarsening. In live cells such domains are not observed and various models are proposed to describe why the systems do not coarsen. We review these attempts critically and show within a phase field approach that membrane bound proteins have the potential to explain the different behaviour observed in vitro and in vivo. Large scale simulatio

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Witkowski, Thomas, Rainer Backofen, and Axel Voigt. "The influence of membrane bound proteins on phase separation and coarsening in cell membranes." Royal Society of Chemistry, 2012. https://tud.qucosa.de/id/qucosa%3A27814.

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A theoretical explanation of the existence of lipid rafts in cell membranes remains a topic of lively debate. Large, micrometer sized rafts are readily observed in artificial membranes and can be explained using thermodynamic models for phase separation and coarsening. In live cells such domains are not observed and various models are proposed to describe why the systems do not coarsen. We review these attempts critically and show within a phase field approach that membrane bound proteins have the potential to explain the different behaviour observed in vitro and in vivo. Large scale simulatio

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Chandrasekhar, Nita. "Computational study of intermetallic and alloy membranes for hydrogen separation." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51861.

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Metal membranes are useful for hydrogen separation from mixed gas streams. They can exhibit perfect selectivity for hydrogen. However, in order to be commercially viable, in addition to providing high hydrogen fluxes, they must also be resistant to poisoning, possess long operating lifetimes and be cost effective. Many types of metal membranes such as pure metals, disordered alloys and amorphous metals have been studied for this application. In this work, we aim to identify intermetallic stoichiometric compounds of two or more metals that could be used as potential membrane materials for hydro

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Tsao, Sai Cheong Timothy. "Preparation and characterization of nanofiltration membranes fabricated from several selected polymers and their uses in separation process." HKBU Institutional Repository, 2001. http://repository.hkbu.edu.hk/etd_ra/362.

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Jack, U. "Fabrication of wet phase inversion capillary membrane, dimension and diffusion effects." Thesis, Cape Peninsula University of Technology, 2006. http://hdl.handle.net/20.500.11838/895.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2006<br>A protocol already exists for fabrication of a capillary membrane having an internal ultrafiltration skin supported by a finger-like pore structure in the external capillary wall (Jacobs and Leukes, 1996; Jacobs and Sanderson, 1997). These membranes have been produced at the Institute of Polymer Science, University of Stellenbosch, South Africa. Two major applications emerged from the development of these internally skinned membranes. One application was in the production of potable water by Ultra-filt

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Wong, Hiu Man. "Removal of pathogens by membrane bioreactor : removal efficiency, mechanisms and influencing factors /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20WONGH.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 93-102). Also available in electronic version. Access restricted to campus users.

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47

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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48

Shahid, Salman. "Polymer-Metal Organic Frameworks (MOFs) Mixed Matrix Membranes For Gas Separation Applications." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS141/document.

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Le comportement plastifiant de polymères purs a été bien étudié dans la littérature. Toutefois, il n'y a eu que peu d'études concernant les membranes à matrices mixtes (MMM). Dans le chapitre 2 de cette thèse, le comportement plastifiant de MMM préparés à partir de nanoparticules mésoporeuses Fe(BTC) et du polymère Matrimid® est étudié avec un gaz pur ou en mélange. Les réseaux métaux-organiques (MOF) sous forme particulaires ont présenté une relativement bonne compatibilité avec le polymère. L'incorporation de Fe(BTC) dans du Matrimid® a permis d'augmenter la perméabilité et la sélectivité de

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49

El-Amari, Abdulla Ali. "Separation of acidic gases using hollow fibre membrane contractors." Thesis, University of Salford, 2002. http://usir.salford.ac.uk/26653/.

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Gas absorption in hollow fibre contactors is being increasingly used due to their enormous surface area/volume ratio. The capability of the hollow fibre membrane modules for the removal of CO 2 and SO2 from a binary gas mixture has been investigated experimentally. Four different modules were used in this study. The membranes in modules one and two were made of microporous polypropylene. The third module was made of non-porous silicone rubber (polydimethylsiloxane) while the latter one was a polyvinylidenefluoride (PVDF) asymmetric hollow fibre membrane. The gas mixtures used in the experiment

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50

Warczok, Justyna. "Concentration of Osmotic Dehydration Solutions using Membrane Separation Processes." Doctoral thesis, Universitat Rovira i Virgili, 2005. http://hdl.handle.net/10803/8534.

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El procesado de alimentos conlleva, en mayoría de los casos, la generación de subproductos o residuos que pueden ser reutilizados o revalorizados mediante la utilización de técnicas de separación por membrana. Estas técnicas ofrecen la posibilidad de tratar las soluciones en condiciones de operación muy suaves, y no comportan en mayoría de las ocasiones, una alteración de los componentes a recuperar. Actualmente, las técnicas de separación por membrana, debido a su alta calidad y relativamente bajos costes, se encuentran completamente integradas en la mayoría de procesos productivos que requie

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