Relevant bibliographies by topics / Membrane electrolysis / Dissertations / Theses
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Dissertations / Theses on the topic 'Membrane electrolysis'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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1

Dayama, Parth Omprakash. "A Comparative Study of Electrodes and Membranes for Anion Exchange Membrane Water Electrolysis Systems." Thesis, KTH, Tillämpad elektrokemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300182.

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Vätgas kan framställas från förnybara energikällor genom vattenelektrolys med anjonbytande membran (AEMWE). AEMWE har vissa fördelar jämfört med traditionell alkalisk vattenelektrolys och elektrolysmed protonledande membran. Till exempel finns det möjlighet att använda alkalisk elektrolyt (även rent vatten) och billiga platinagruppsmetallfria katalysatorer tillsammans med ett anjonbytesmembran. Den största utmaningen med tekniken är att uppnå utmärkt och stabil prestanda för membran och elektroder. AemionTM anjonbytande membran (AEMs) av olika tjocklek, vattenupptag och kapacitet undersöktes i
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2

Richardson, Peter. "Oxygen evolution electrocatalysts for proton exchange membrane water electrolysis." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/374786/.

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Proton exchange membrane (PEM) water electrolysers are forecast to become an important intermediary energy storage technology between renewable power sources and energy distribution/usage. This is because they offer a production route to high purity H2 that is both non-polluting and efficient. Energy stored as H2 can be converted back to electricity for use in the national grid, pumped into existing natural gas networks or used as a fuel for hydrogen-powered vehicles. The majority of the energy losses in a PEM water electrolyser are associated with the high overpotential that is required for t
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3

Sutherland, Richard Daniel. "Performance of different proton exchange membrane water electrolyser components / cRichard Daniel Sutherland." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9214.

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Water electrolysis is one of the first methods used to generate hydrogen and is thus not considered to be a new technology. With advances in proton exchange membrane technology and the global tendency to implement renewable energy, the technology of water electrolysis by implementation of proton exchange membrane as solid electrolyte has developed into a major field of research over the last decade. To gain an understanding of different components of the electrolyser it is best to conduct a performance analysis based on hydrogen production rates and polarisation curves. The study aim was to co
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4

Kinney, Chris 1982. "Water modeling the solid oxide membrane electrolysis with rotating cathode process." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32729.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004.<br>Vita.<br>Includes bibliographical references (leaf 35).<br>The Kroll process for refining titanium is an expensive batch process which produces a final product that still requires intensive post processing to create usable titanium. A new process, Solid Oxide Membrane Electrolysis with Rotating Cathode (SOMERC) process is being explored. The SOMERC process is a continuous process that could produce large quantities of high quality titanium at a fraction of the cost of the Kroll process. T
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Smith, Richard. "RuO2 Nanorods as an Electrocatalyst for Proton Exchange Membrane Water Electrolysis." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/527.

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The desire for pure diatomic hydrogen gas, H2(g), has been on the rise since the concept of the hydrogen economy system was proposed back in 1970. The production of hydrogen has been extensively examined over 40 + years as the need to replace current fuel sources, hydrocarbons, has become more prevalent. Currently there are only two practical and renewable production methods of hydrogen; landfill gas and power to gas. This study focuses on the later method; using various renewable energy sources, such as photovoltaics, to provide off-peak energy to perform water electrolysis. Efficient electro
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6

Klose, Carolin [Verfasser], Stefan [Akademischer Betreuer] Glunz, and Simon [Akademischer Betreuer] Thiele. "Novel polymer electrolyte membrane compositions for electrolysis and fuel cell systems." Freiburg : Universität, 2020. http://d-nb.info/1208148036/34.

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7

Fiorentini, Diego. "Development of a polymeric diaphragm for Alkaline Water Electrolysis." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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The importance of new technologies capable of providing clean energy is one of the most difficult and important challenge that science has to take up. The discovery of new green processes or the development of those already in use are common goals, which can partially solve the current climatic problems. The aim of this thesis is to extend the GVS portfolio with a polymeric separator able to improving the performances of alkaline water electrolysis (AWE) currently in use, as an alternative to separators produced by competitors. The separator consists of a membrane made of a high temperature re
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8

Guan, Xiaofei. "Novel process for recycling magnesium alloy employing refining and solid oxide membrane electrolysis." Thesis, Boston University, 2013. https://hdl.handle.net/2144/11005.

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Thesis (Ph.D.)--Boston University<br>Magnesium is the least dense engineering metal, with an excellent stiffness-to-weight ratio. Magnesium recycling is important for both economic and environmental reasons. This project demonstrates feasibility of a new environmentally friendly process for recycling partially oxidized magnesium scrap to produce very pure magnesium at low cost. It combines refining and solid oxide membrane (SOM) based oxide electrolysis in the same reactor. Magnesium and its oxide are dissolved in a molten flux. This is followed by argon-assisted evaporation of dissolved magne
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9

SILVA, MARCO A. O. da. "Estudos eletroquímicos de eletrólise a membrana polimérica para produção de hidrogênio." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10017.

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Made available in DSpace on 2014-10-09T12:33:50Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:00Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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10

Mässgård, Hampus, and Arvid Jonsson. "An Industrial Perspective on Ultrapure Water Production for Electrolysis : A techno-economic assessment of membrane distillation for electrolysis - synergies, performance, costs, and value propositions." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298250.

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Sustainable development is one of the most important issues in todays’ industrial sector, and several markets are now looking for alternatives to fossil fuels. One of these solutions is hydrogen; a clean, easily combustible gas which can be used as fuel in several industrial processes, such as steel production and power generation. However, the production of green hydrogen is limited, and this is where the need for electrolysis emerges. Electrolysis is a way to produce green hydrogen by separating water into hydrogen and oxygen using energy. One crucial aspect is that this process requires ext
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11

Flores, Hernández José Roberto. "Optimization of membrane-electrode assemblies for SPE water electrolysis by means of design of experiments /." Stuttgart : Fraunhofer-IRB-Verl, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014175428&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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12

Soundiramourty, Anuradha. "Towards the low temperature reduction of carbon dioxide using a polymer electrolyte membrane electrolysis cell." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112174.

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L’objectif principal de ce travail de thèse était d’évaluer les propriétés électro catalytiques de différents composés moléculaires vis-à-vis de la réduction électrochimique basse température du dioxyde de carbone, en vue d’applications dans des cellules d’électrolyse à électrolyte polymère solide. Après avoir mesuré les performances de métaux modèles (cuivre et nickel) servant de référence, nous avons testé les performances de quelques composés moléculaires à base de nickel. Le rôle catalytique de ces différents composés a été mis en évidence en mesurant les courbes intensité-potentiel dans d
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13

Goñi, Urtiaga Asier. "Cesium dihydrogen phosphate as electrolyte for intermediate temperature proton exchange membrane water electrolysis (IT-PEMWE)." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2490.

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In this work the potential application of CsH2PO4 as intermediate temperature electrolyte for Proton Exchange Membrane Water Electrolysis (PEMWE) was studied. This material, from the phosphate-based solid acid family, was previously reported as a promising electrolyte for intermediate temperature PEM fuel cells although no study as electrolyte in a PEMWE system had been carried out before. The physico-chemical properties of phosphate-based solid acids in terms of structure and morphology were investigated and their thermal stability evaluated. Proton conductivity at the intermediate temperatur
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Kunovjánek, Miroslav. "Studium vodivosti PVA membrán, obsahujících alkalické hydroxidy." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-234580.

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Thesis deals with study of separators and membranes, suitable for using in alkali electrochemical applications like fuel cells or electrolysis. As basic material for membranes production is used polyvinylalkohol (PVA). Various methods of PVA cross linking are introduced in the thesis. PVA membranes are also doped by various types of additives to improve the attributes of the membranes like mechanical stability and or conductivity. The aim of the work is verification of parameters of membranes, doped by alkali hydroxides KOH, NaOH and LiOH at various temperatures. These hydroxides are added to
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15

Gratz, Eric. "Solid oxide membrane (SOM) stability in molten ionic flux for the direct electrolysis of magnesium oxide." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12766.

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Thesis (Ph.D.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>Direct electrolysis of magnesmm from its oxide is less expensive and more environmentally friendly than current methods of magnesium production. The solid oxide membrane (SOM) process is a viable method for pro
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16

Watkins, Luke. "Development of non-noble catalysts for hydrogen and oxygen evolution in alkaline polymer electrolyte membrane electrolysis." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2296.

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Hydrogen is seen as the ‘energy carrier of the future’ due to the element’s relative abundance, the formation of water as opposed to the green house gases when utilised as a fuel in fuel cells, and the ability to be produced by electrolysers powered from renewable energy sources such as wind, water and sunlight. The development of hydrogen production through electrolysis is hindered by the high costs associated with the technology, specifically the ion exchange membranes and electrocatalysts that are employed in the membrane electrode assemblies used in polymer electrolyte electrolysers. This
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Ecklund-Mitchell, Lars E. "Development of Thin CsHSO4 Membrane Electrode Assemblies for Electrolysis and Fuel Cell Applications." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002627.

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18

Petrik, Leslie F. "Pt Nanophase supported catalysts and electrode systems for water electrolysis." Thesis, University of the Western Cape, 2008. http://hdl.handle.net/11394/2743.

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Doctor Scientiae - DSc<br>In this study novel composite electrodes were developed, in which the catalytic components were deposited in nanoparticulate form. The efficiency of the nanophase catalysts and membrane electrodes were tested in an important electrocatalytic process, namely hydrogen production by water electrolysis, for renewable energy systems. The activity of electrocatalytic nanostructured electrodes for hydrogen production by water electrolysis were compared with that of more conventional electrodes. Development of the methodology of preparing nanophase materials in a rapid, effic
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Xu, Lang. "Investigating the current/voltage/power/stability capabilities of enzyme-based membrane-less hydrogen fuel cells." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:efef7124-3444-4531-872b-2ee8868e0aa0.

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Fuel cell is a device that can directly convert chemical energy into electrical energy. For low-temperature fuel cells, catalysts are required. Fuel cells using Pt-based or other non-biological materials as catalysts are known as conventional fuel cells. Inspired from Nature, enzymes can be used as catalysts in fuel cells known as enzyme-based fuel cells. The conventional and enzymatic fuel cells share the same underlying electrochemical principles, while enzyme-based fuel cells have their intrinsic advantages and disadvantages due to enzyme properties. The objective of this thesis is to inves
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20

Lui, Wan-yin, and 呂韻{21394e}. "A study on the performance of proton-exchange-membrane fuel cells and solar electrolysis for hydrogen production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B26662425.

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21

Liu, Chang Verfasser], Werner [Akademischer Betreuer] [Lehnert, and Lorenz [Akademischer Betreuer] Singheiser. "Noble metal coated porous transport layers for polymer electrolyte membrane water electrolysis / Chang Liu ; Werner Lehnert, Lorenz Singheiser." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/124069119X/34.

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22

González, Martínez Isaí [Verfasser], and Kai [Akademischer Betreuer] Sundmacher. "Hydrogen chloride electrolysis in a polymer-electrolyte-membrane reactor with oxygen-depolarized cathode / Isaí González Martínez. Betreuer: Kai Sundmacher." Magdeburg : Universitätsbibliothek, 2015. http://d-nb.info/1080560793/34.

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23

Skulimowska, Anita. "Matériaux pour électrolyseur à membrane électrolyte protonique." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20020.

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Les travaux présentés dans ce mémoire concernent les composants d'assemblages membrane-électrodes (AMEs) pour électrolyseur à membrane échangeuse de protons (PEM – proton exchange membrane) fonctionnant à moyenne température. L'électrolyse de l'eau PEM, alimentée par l'énergie électrique provenant de sources renouvelables, est une voie pour la production efficace et durable d'hydrogène de haute pureté. De nouveaux électrolytes polymère solides (un des principaux éléments de la cellule d'électrolyse) à double conduction, basés sur un réseau semi-interpénétré créé par le polybenzimidazole sulfon
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24

Biradar, Mahesh B. "Design, Scale-Up, and Integration of an Ammonia Electrolytic Cell with a Proton Exchange Membrane (PEM) Fuel Cell." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1192811135.

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25

Kinfack, leoga Arnaud. "Développement par PECVD de membranes conductrices protoniques de type phosphonique pour la production d’hydrogène par (photo-)électrolyse de l’eau." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS130/document.

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Le but de ces travaux était de développer des membranes conductrices protoniques de type phosphonique par PECVD radio-fréquence en décharges continue et pulsée à partir du mono-précurseur diméthyl allylphosphonate. De telles membranes sont pressenties comme pouvant avantageusement remplacer la membrane Nafion® ou les membranes conventionnelles de type sulfonique ou phosphonique classiquement utilisées dans les dispositifs piles à combustible ou électrolyseur de type PEM. Ainsi, une étude paramétrique visant à établir des corrélations entre les propriétés des films et les paramètres de dépôt a
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Andolfatto, Françoise. "Electrolyse de l'eau à membrane : étude des électrodes et d'une cellule de test." Grenoble INPG, 1993. http://www.theses.fr/1993INPG0050.

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L'oxyde d'iridium a ete etudie comme catalyseur de degagement d'oxygene et d'hydrogene en milieu acide. Ce catalyseur est prepare par decomposition thermique d'un sel de chlorure d'iridium sous un courant d'air. Une etude bibliographique et experimentale des conditions de preparation a ete faite afin d'obtenir des performances optimales. Ses proprietes electrocatalytiques sont tres bonnes en degagement d'oxygene. Le mecanisme du degagement d'hydrogene sur ce catalyseur en milieu acide a ete determine a partir de courbes de tafel et de diagrammes d'impedance: il est du type volmer-heyrovsky, av
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Rhandi, Maha. "Modélisation de procédés électrochimiques de type PEM (Proton Electrolyte Membrane) pour le développement du vecteur Hydrogène." Thesis, Université Grenoble Alpes, 2021. http://www.theses.fr/2021GRALI008.

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Actuellement, l'hydrogène est considéré comme un vecteur d'énergie prometteur. Cependant, il est préalablement produit par une électrolyse, une photo-catalyse, ou des procédés thermochimiques, biologiques. En suit une étape de stockage/conditionnement se réalisant par une compression, une liquéfaction, une physisorption ou une chimisorption. Enfin, la conversion quand elle est électrochimique et a lieu dans les piles à combustible. L'hydrogène remplit les principales caractéristiques pour atteindre les performances requises comme vecteur énergétique efficace, mais sa faible densité volumique r
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Guenot, Benoit. "Etude de matériaux catalytiques pour la conversion électrochimique de l'énergie Clean hydrogen generation from the electrocatalytic oxidation of methanol inside a proton exchange membrane electrolysis cell (PEMEC): effect of methanol concentration and working temperature Electrochemical reforming of Dimethoxymethane in a Proton Exchange Membrane Electrolysis Cell: a way to generate clean hydrogen for low temperature fuel cells." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2017. http://www.theses.fr/2017ENCM0004.

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L’hydrogène est un vecteur énergétique prometteur réalisant une très bonne synergie avec l’exploitation des sources d’énergie intermittentes telles que le solaire ou l’éolien. Le développement de ses moyens de production et de conversion électrochimique représente un enjeu majeur dans le contexte de transition énergétique dans lequel nous vivons aujourd’hui. Les piles à combustible et les électrolyseurs utilisant la technologie PEM (Membrane Echangeuse de Protons) sont des systèmes électrochimiques de conversion de l’énergie matures tandis que les systèmes réversibles capables de remplir ces d
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Dreyer, Herbert Morgan Evans. "A comparison of catalyst application techniques for membrane electrode assemblies in SO2 depolarized electrolysers / Dreyer H.M.E." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7373.

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Hydrogen production via the electrolysis of water has gained a lot of attention in the last couple of years. Research related to electrolysers is mostly aimed towards decreasing the noble–metal catalyst content. In this study the presently used catalyst application techniques were reviewed and critically examined to find commercially applicable and effective methods. Selected methods were then practically applied to determine their feasibility and to gain “know–how” related to the practical application of these techniques. The selected techniques were the hand paint, inkjet print, screen print
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Krüger, Andries Johannes. "Properties and use of SO2 for the hybrid sulfur process / Krüger A.J." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7615.

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Thematic interrelation is an underdeveloped field of inquiry in Lukan studies. The design and elegance of Lukan theology begs for guided investigation into a possible system of organisation that governs history and theology, that is, narrative and theme. Based on the Greimasian Actantial Model, morpho–syntactical structural–critical analysis of Luke and Acts reveals that the covenant concept in its operative aspect of service functions as an organising principle, structuring the narratives and facilitating thematic interrelation. A survey of representative Lukan research consisting of five met
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Tan, Chiuan Chorng. "A new concept of regenerative proton exchange membrane fuel cell (R-­‐PEMFC)." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0012.

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Les travaux précédents trouvés dans la littérature ont mis l'importance sur la pile à combustible PEM ou électrolyseur PEM. Certains articles ont étudié également la pile à combustible réversible et le système d'alimentation en hydrogène par énergie solaire en intégrant à la fois la pile à combustible et électrolyseur. Contrairement à un « Unitised regenerative fuel cell (URFC)», notre conception a un compartiment individuel pour chaque système de PEM-Fuel Cell et d'electrolyseur-PEM et nommé Quasi - URFC. Grâce à ce nouveau concept, l'objectif principal est de réduire le coût de la pile à com
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Parra, Restrepo Julian. "Caractérisation des hétérogénéités de fonctionnement et de dégradation au sein d’un électrolyseur à membrane échangeuse de protons (PEM)." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0044.

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Les électrolyseurs à membrane échangeuse de protons (PEM) représentent une technologie prometteuse pour répondre au besoin de stocker l’énergie provenant de sources renouvelables et intermittentes telles que le solaire et l’éolien. L’hydrogène vert produit par cette technologie peut répondre aux besoins des industries déjà consommatrices d’hydrogène ou être utilisé au sein de nouvelles applications comme les voitures à piles à combustible. Afin de continuer le déploiement des électrolyseurs PEM, il est nécessaire d’augmenter leur durée de vie et leur surface active unitaire. Hors sur de grande
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Krause, Kevin. "Caractérisation infrarouge operando des électrolyseurs à membrane électrolytique polymère pour la séparation de l'eau." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0022.

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Les électrolyseurs à électrolyte polymère (PEM), employés dans le processus d'électrolyse de l'eau, ont une utilisation limitée due au manque de connaissances des phénomènes physiques en jeu, notamment au niveau de la membrane utilisée pour séparer l'eau. La compréhension des mécanismes de transfert de masse et d'ions au sein de cette membrane est essentielle pour améliorer le rendement de ces systèmes. Ainsi, l'objectif de cette thèse est de développer une technique de caractérisation basée sur l'imagerie afin de mieux comprendre les phénomènes de transport dans la membrane d'une PEM. Le déro
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Lee, Joongoo. "A semisynthetic protein nanoreactor for single-molecule chemistry." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:b0c61278-5483-44b7-a662-f079c0f2c23f.

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The covalent chemistry of individual reactants bound within a protein nanopore can be monitored by observing the ionic current flow through the pore, which acts as a nanoreactor responding to bond-making and bond-breaking events. However, chemistry investigated in this way has been largely confined to the reactions of thiolates, presented by the side chains of cysteine residues. The introduction of unnatural amino acids would provide a large variety of reactive side chains with which additional single-molecule chemistry could be investigated. An efficient method to incorporate unnatural amino
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Coetzee, Morné Pieter. "Upscaling of a sulphur dioxide depolarized electrolyzer / Coetzee, M.P." Thesis, North-West University, 2012. http://hdl.handle.net/10394/7001.

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In the last couple of years there has been a great need for finding alternative, cleaner burning fuel sources. This search has led to the development of various hydrogen technologies. The reason for this is that when burnt, hydrogen gas only forms water and oxygen as products. One of the methods used in the production of hydrogen gas is that of the electrolysis of sulphur dioxide which is facilitated by a sulphur dioxide depolarized electrolyzer. The electrolysis of sulphur dioxide has the advantage of requiring lower cell voltages in the electrolysis process when compared to the electrolysis
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Goldet, Gabrielle. "Electrochemical investigations of H2-producing enzymes." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:696e5b9d-a80f-493e-85d4-0954be499b72.

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Hydrogenases are a family of enzyme that catalyses the bidirectional interconversion of H<sup>+</sup> and H<sub>2</sub>. There are two major classes of hydrogenases: the [NiFe(Se)]- and [FeFe]-hydrogenases. Both of these benefit from characteristics which would be advantageous to their use in technological devices for H<sub>2</sub> evolution and the generation of energy. These features are explored in detail in this thesis, with a particular emphasis placed on defining the conditions that limit the activity of hydrogenases when reducing H<sup>+</sup> to produce H<sub>2</sub>. Electrochemistry
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NANDENHA, JÚLIO. "Estudo da oxidação eletroquímica do ácido fórmico utilizando eletrocatalisadores Pd/C-Sb2O5.SnO2, PdAu/C-Sb2O5.SnO2, PdIr/C-Sb2O5.SnO2 e PdAulr/C-Sb2O5.SnO2 preparados via redução por borohidreto de sódio." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26815.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-11-11T12:52:46Z No. of bitstreams: 0<br>Made available in DSpace on 2016-11-11T12:52:46Z (GMT). No. of bitstreams: 0<br>Os eletrocatalisadores Pd/C, Pd/C-15%ATO, PdAu/C-15%ATO (90:10, 70:30 e 50:50), PdIr/C-15%ATO (90:10, 70:30 e 50:50) e PdAuIr/C-15%ATO (90:5:5, 70:20:10 e 50:45:5) foram preparados pelo método de redução por borohidreto de sódio. Esses eletrocatalisadores foram caracterizados por espectroscopia de energia dispersiva de raios X (EDX), difração de raios X (DRX) e microscopia eletrônica de transmissão (MET), enquanto q
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Dubouis, Michel. "Régénération de la soude à partir de solutions de carbonate de sodium par des procédés électromembranaires." Grenoble INPG, 1993. http://www.theses.fr/1993INPG0051.

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Differents procedes electromembranaires sont concus et etudies pour regenerer de la soude a partir de solutions de carbonate de sodium. En presence d'especes oxydables en faibles quantites, la regeneration s'effectue avec une cellule a une seule membrane permselective echangeuse de cations. Pour eviter l'oxydation de ces especes, par exemple le sulfure (na#2s) de la liqueur verte du procede kraft, le procede electromembranaire le plus adapte par sa simplicite et par sa capacite de fonctionnement sur le long terme, est constitue d'un electrolyseur a deux membranes echangeuses de cations, preced
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39

Topriska, Evangelia Vasiliki. "Experimental and computational study of a solar powered hydrogen production system for domestic cooking applications in developing economies." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12824.

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In many developing economies, a high percentage of domestic energy demand is for cooking based on fossil and biomass fuels. Their use has serious health consequences affecting almost 3 billion people. Cleaner cooking systems have been promoted in these countries such as solar cooking and smokeless stoves with varying degrees of success. In parallel, solar electrolytic hydrogen systems have been developed and increasingly used during the last 25 years for electricity, heat and automobile fueling applications. This study has developed and tested experimentally in the laboratory a solar hydrogen
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40

Catonné, Jean-Claude. "Contribution à l'étude du défaut de sélectivité présenté par les membranes échangeuses d'anions, dans le cadre de leurs applications au traitement électrochimique de régénération des solutions aqueuses d'acides minéraux." Paris 6, 1986. http://www.theses.fr/1986PA066030.

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Essai d'identification de l'origine de la "fuite h+" et de celle des différentes sources susceptibles d'alimenter le mouvement d'eau au sein des membranes échangeuses d'anions, selon que le matériau est fortement ou non "élusterisé", puis d'établissement de l'existence d'une corrélation étroite entre l'intensité de fuite protonique et celle de la perméabilité osmotique des membranes (ainsi que le laisse prévoir la théorie de Gierke dans le cas des membranes échangeuses de cations). Et enfin, évaluation du rôle du champ électrique, ainsi que celui de la composition de l'électrolyte sur les résu
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41

Сердюк, Василь Олексійович, Василий Алексеевич Сердюк та Vasil OleksIyovich Serdyuk. "Мембранні електрохімічні пристрої в процесах регенерації гальванічних розчинів". Thesis, Сумський державний університет, 2021. https://essuir.sumdu.edu.ua/handle/123456789/86159.

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Дисертація присвячена розробці науково-практичних засад удосконалення процесів регенерації гальванічних технологічних розчинів за допомогою методу мембранного електролізу. Проведено аналітичний огляд науково-технічної інформації щодо областей застосування та умов роботи мембранних електрохімічних пристроїв. На базі аналізу наукових джерел показано ефективність методу мембранного електролізу у процесах очищення водних розчинів від шкідливих та отруйних речовин. Показано, що підвищення якості та терміну роботи технологічних хромовмісних гальванічних ванн можливо завдяки роботі мембранних
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42

Daryaei, Amin. "Synthesis and Characterization of Linear and Crosslinked Sulfonated Poly(arylene ether sulfone)s: Hydrocarbon-based Copolymers as Ion Conductive Membranes for Electrochemical Systems." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/86439.

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Sulfonated poly(arylene ether sulfone)s as ion conductive copolymers have numerous potential applications. Membranes cast from these copolymers are desirable due to their good chemical and thermal stability, excellent mechanical strength, satisfactory conductivity, and excellent transport properties of water and ions. These copolymers can be used in a variety of topologies. Structure-property-performance relationships of these membranes as candidates for electrolysis of water for hydrogen production and for purification of water from dissolved ions have been studied. Linear and multibloc
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43

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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44

Savignac, Julie. "Impact des interactions membrane/électrolyte sur la diffusion de sucres à travers des membranes échangeuses d'ions." Phd thesis, Université Paul Sabatier - Toulouse III, 2010. http://tel.archives-ouvertes.fr/tel-00581794.

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Des travaux récents ont montré que le transfert d'espèces neutres à travers différents types de membranes est modifié selon la composition ionique. En présence de sels, le flux de soluté est augmenté, ce qui peut conduire à une dégradation des performances des procédés. Ce travail présente les résultats d'une étude expérimentale dans laquelle les flux de diffusion de sucre dans différentes matrices ioniques, eau et électrolytes, ont été déterminés à travers des membranes échangeuses d'ions. Une procédure spécifique a été mise au point pour déterminer l'impact des différentes interactions sur l
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45

Lopes, Oliveira Luiz Fernando. "Un modèle physique multiéchelle pour l’analyse de l’électrolyse de l’eau dans des électrolyseurs à membrane échangeuse de protons (PEMWE) : des données ab-initio vers les observables macroscopiques." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10008.

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La filière énergétique de l'hydrogène se réfère à la possibilité d'utilisation de H2 pour transporter et produire de l'énergie. Il existe différentes méthodes pour fabriquer H2, parmi elles, l'électrolyse de l'eau. Parmi les dispositifs existants utilisés pour la production d'hydrogène par électrolyse de l'eau, les électrolyseurs à membrane échangeuse de protons (PEMWE) ont été très étudiés durant ces dernières années. L'objectif principal de cette thèse est de fournir un modèle multi échelle pour l'analyse du fonctionnement des PEMWE. Pour atteindre cet objectif, nous utilisons différentes te
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46

Fuoco, Alessio. "Computational and experimental studies on membrane-solute interactions in desalination systems using ion-exchange membranes." Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30132/document.

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Des études antérieures ont mis en évidence que le transfert de solutés neutres à travers des membranes est influencé par la présence d'ions en solution. Ainsi, la connaissance des interactions multiples à l'échelle nanométrique, entre le polymère, l'eau et les solutés (ions, espèces organiques) constituent un verrou pour l'amélioration des performances des procédés membranaires. Dans cette étude une approche multi-échelle fondamentale est proposée, combinant des outils théoriques et expérimentaux, afin d'obtenir les paramètres microscopiques et macroscopiques caractérisant les interactions étu
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47

Eladeb, Aboulbaba. "Conception et validation expérimentale d’une cellule électrochimique de type PEM pour l’appauvrissement en oxygène de l’air." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0310/document.

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Ce travail concerne la mise au point d’une cellule électrochimique de technologie PEM pour l’appauvrissement en oxygène d’un flux d’air. L’idée de départ consiste à répondre aux problématiques des photo-bioréacteurs en ce qui concerne le contrôle de la quantité d’oxygène nécessaire pour la croissance des micro-organismes. Deux axes principaux sont indispensables pour notre étude. Au début, nous avons étudié l’aspect technologique vu que la cellule électrochimique à concevoir n’est que le fruit de la combinaison d’une demi-pile à combustible au niveau de la cathode (réduction de l’oxygène) avec
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48

Giancola, Stefano. "Membranes ionomères renforcées par des nanofibres obtenues par électrofilage pour piles à combustible et l'électrolyseur." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT218.

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La production de membranes échangeuses de protons (PEM) robustes et présentant une conductivité élevée est essentielle pour le développement à grande échelle de dispositifs de stockage et de conversion de l’énergie tels que les piles à combustible (PEMFC) et les électrolyseurs (PEMWE). Ces travaux de thèse portent sur la préparation et la caractérisation de membranes composites préparées à partir d’acide perfluorosulfonique, à chaine latérale courte (SSC-PFSA), de type Aquivion®, et de fibres de polymères obtenues par filage électrostatique. Cette dernière technique permet de préparer des maté
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49

Dedigama, I. U. "Diagnostics and modeling of polymer electrolyte membrane water electrolysers." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1426127/.

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Proton exchange membrane water electrolyser (PEMWE) technology can be used to produce hydrogen from renewable energy sources; the technology is therefore a promising component in future national power and transportation fuel systems. The main challenges faced by the technology include prohibitive materials costs, maximising efficiency and ensuring suitable longevity. Therefore, research is needed to understand the internal operation of the systems so that cell design can be optimised to obtain maximum performance and longevity. PEMWE is a low temperature electrolysis system that consists of ce
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50

Sundin, Camilla. "Environmental Assessment of Electrolyzers for Hydrogen Gas Production." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260069.

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Hydrogen has the potential to become an important energy carrier in the future with many areas of applications, as a clean fuel for transportation, heating, power generation in places where electricity use is not fit, etc. Already today hydrogen plays a key role in numerous industries such as petroleum refineries and chemical industries. There are different production methods for hydrogen. Today, natural gas reforming is the most commonly used. With the growing importance of green production paths, hydrogen production by electrolysis is expected to grow. Two main electrolyzer technologies are
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