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Author : Maximilian Röhe
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes written by Maximilian Röhe and published by . This book was released on 2022* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Röhe, Maximilian
Publisher : KIT Scientific Publishing
ISBN 13 : 3731512343
Total Pages : 178 pages
Book Rating : 4.7/5 (315 download)
Download or read book Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes written by Röhe, Maximilian and published by KIT Scientific Publishing. This book was released on 2024-01-09 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
Author : David Franzen
Publisher : Cuvillier Verlag
ISBN 13 : 3736965141
Total Pages : 136 pages
Book Rating : 4.7/5 (369 download)
Download or read book Experimental and model-based investigation of overpotentials during oxygen reduction reaction in silver-based gas-diffusion electrodes written by David Franzen and published by Cuvillier Verlag. This book was released on 2021-10-26 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorine is one of the most important basic chemicals, which is used directly or indirectly in the production of around 60 % of all chemical products. The production is almost exclusively based on energy intensive electrolysis processes, with an average of 2.5 – 3.5 MWh of electrical energy required per ton of chlorine generated. This means that chlorine production alone accounts for around 3 % of the electrical energy used worldwide in industry. By using oxygen depolarized cathodes (ODC), it is possible to reduce the demand for electrical energy on an industrial scale by about 25 %. Instead of hydrogen evolution, oxygen reduction takes place. Due to the low solubility of oxygen, the electrode is designed as a gas-diffusion electrodes (GDE). These are porous silver-based electrodes with hydrophobic regions due to the use of polytetrafluoroethylene (PTFE). During operation, the liquid electrolyte penetrates the pore structure, but the PTFE prevents complete flooding of the electrode. Oxygen is supplied via a gas compartment and enters the internal structure of the electrode. A three-phase interface is formed, consisting of liquid electrolyte, gas and catalytically active solid, at which the electrochemical reaction takes place. Although the technology is already successfully used industrially, many processes, especially the electrolyte distribution, inside the GDE remain unknown. In this dissertation, the influence of PTFE is first systematically investigated. Subsequently the process is described in a pseudo-2D model supported by operando experiments. Finally, the exact penetration depth of the electrolyte is analyzed using specially designed electrodes.
Author : Schöller, Lukas
Publisher : KIT Scientific Publishing
ISBN 13 : 3731513404
Total Pages : 230 pages
Book Rating : 4.7/5 (315 download)
Download or read book Multiscale Modeling of Curing and Crack Propagation in Fiber-Reinforced Thermosets written by Schöller, Lukas and published by KIT Scientific Publishing. This book was released on 2024-03-15 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the production of fiber-reinforced thermosets, the resin material undergoes a reaction that can lead to damage. A two-stage polymerization reaction is modeled using molecular dynamics and evaluations of the system including a fiber surface are performed. In addition, a phase-field model for crack propagation in heterogeneous systems is derived. This model is able to predict crack growth where established models fail. Finally, the model is used to predict crack formation during curing.
Author : Supramaniam Srinivasan
Publisher :
ISBN 13 :
Total Pages : 668 pages
Book Rating : 4.:/5 (43 download)
Download or read book Proceedings of the Second Symposium on Electrode Materials and Processes for Energy Conversion and Storage written by Supramaniam Srinivasan and published by . This book was released on 1987 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 526 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Franzen
Publisher : Cuvillier
ISBN 13 : 9783736975149
Total Pages : 136 pages
Book Rating : 4.9/5 (751 download)
Download or read book Experimental and Model-based Investigation of Overpotentials During Oxygen Reduction Reaction in Silver-based Gas-diffusion Electrodes written by David Franzen and published by Cuvillier. This book was released on 2021-11 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorine is one of the most important basic chemicals, which is used directly or indirectly in the production of around 60 % of all chemical products. The production is almost exclusively based on energy intensive electrolysis processes, with an average of 2.5 - 3.5 MWh of electrical energy required per ton of chlorine generated. This means that chlorine production alone accounts for around 3 % of the electrical energy used worldwide in industry. By using oxygen depolarized cathodes (ODC), it is possible to reduce the demand for electrical energy on an industrial scale by about 25 %. Instead of hydrogen evolution, oxygen reduction takes place. Due to the low solubility of oxygen, the electrode is designed as a gas-diffusion electrodes (GDE). These are porous silver-based electrodes with hydrophobic regions due to the use of polytetrafluoroethylene (PTFE). During operation, the liquid electrolyte penetrates the pore structure, but the PTFE prevents complete flooding of the electrode. Oxygen is supplied via a gas compartment and enters the internal structure of the electrode. A three-phase interface is formed, consisting of liquid electrolyte, gas and catalytically active solid, at which the electrochemical reaction takes place. Although the technology is already successfully used industrially, many processes, especially the electrolyte distribution, inside the GDE remain unknown. In this dissertation, the influence of PTFE is first systematically investigated. Subsequently the process is described in a pseudo-2D model supported by operando experiments. Finally, the exact penetration depth of the electrolyte is analyzed using specially designed electrodes.
Author : A. A. Wragg
Publisher : IChemE
ISBN 13 : 9780852954171
Total Pages : 358 pages
Book Rating : 4.9/5 (541 download)
Download or read book 5th European Symposium on Electrochemical Engineering written by A. A. Wragg and published by IChemE. This book was released on 1999 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Aspects of Electrochemical Engineering is the main theme of this symposium. It charts the way ahead for the future development and economic viability of all types of electrochemical processing.
Author : Jürgen Garche
Publisher : Newnes
ISBN 13 : 0444527451
Total Pages : 4532 pages
Book Rating : 4.4/5 (445 download)
Download or read book Encyclopedia of Electrochemical Power Sources written by Jürgen Garche and published by Newnes. This book was released on 2013-05-20 with total page 4532 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Electrochemical Power Sources is a truly interdisciplinary reference for those working with batteries, fuel cells, electrolyzers, supercapacitors, and photo-electrochemical cells. With a focus on the environmental and economic impact of electrochemical power sources, this five-volume work consolidates coverage of the field and serves as an entry point to the literature for professionals and students alike. Covers the main types of power sources, including their operating principles, systems, materials, and applications Serves as a primary source of information for electrochemists, materials scientists, energy technologists, and engineers Incorporates nearly 350 articles, with timely coverage of such topics as environmental and sustainability considerations
Author : Pei Kang Shen
Publisher : Springer Nature
ISBN 13 : 9813360771
Total Pages : 259 pages
Book Rating : 4.8/5 (133 download)
Download or read book Electrochemical Oxygen Reduction written by Pei Kang Shen and published by Springer Nature. This book was released on 2021-01-16 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses systematically the theoretical research and the applications of electrochemical oxygen reduction. Oxygen reduction reaction is a common issue in electrochemistry, but is also an important process involved in the field of energy, cryogenic fuel cells, metal–air cells, oxygen sensors and hydrogen peroxide preparation. This book is divided into 6 chapters; it starts with a description of dynamic mechanisms, followed by a detailed introduction on the related experimental methods and related catalyst preparation technology. By providing the basic methods and testing techniques, and by demonstrating their applications, it helps readers gain a better understanding of oxygen reduction reactions, making it a valuable resource for the industrialization of scientific research achievements. Accordingly, the book appeals to a broad readership, particularly graduate students, those working at universities and research organizations, and industrial researchers.
Author : Constantinos G. Vayenas
Publisher : Springer Science & Business Media
ISBN 13 : 0387494898
Total Pages : 434 pages
Book Rating : 4.3/5 (874 download)
Download or read book Modern Aspects of Electrochemistry 42 written by Constantinos G. Vayenas and published by Springer Science & Business Media. This book was released on 2008-03-08 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume analyzes and summarizes recent developments in several key interfacial electrochemical systems in the areas of fuel cell electrocatatalysis, electrosynthesis and electrodeposition. The six Chapters are written by internationally recognized experts in these areas and address both fundamental and practical aspects of several existing or emerging key electrochemical technologies. The Chapter by R. Adzic, N. Marinkovic and M. Vukmirovic provides a lucid and authoritative treatment of the electrochemistry and electrocatalysis of Ruthenium, a key element for the devel- ment of efficient electrodes for polymer electrolyte (PEM) fuel cells. Starting from fundamental surface science studies and interfacial considerations, this up-to-date review by some of the pioneers in this field, provides a deep insight in the complex catalytic-electrocatalytic phenomena occurring at the interfaces of PEM fuel cell electrodes and a comprehensive treatment of recent developments in this extremely important field. Several recent breakthroughs in the design of solid oxide fuel cell (SOFC) anodes and cathodes are described in the Chapter of H. Uchida and M. Watanabe. The authors, who have pioneered several of these developments, provide a lucid presentation d- cribing how careful fundamental investigations of interfacial electrocatalytic anode and cathode phenomena lead to novel electrode compositions and microstructures and to significant practical advances of SOFC anode and cathode stability and enhanced electrocatalysis.
Author : Christian Siegel
Publisher : Logos Verlag Berlin GmbH
ISBN 13 : 3832539174
Total Pages : 180 pages
Book Rating : 4.8/5 (325 download)
Download or read book High temperature polymer electrolyte membrane fuel cells written by Christian Siegel and published by Logos Verlag Berlin GmbH. This book was released on 2015-03-20 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional computational fluid dynamics model of a high temperature polymer electrolyte membrane fuel cell, employing a high temperature stable polybenzimidazole membrane electrode assembly doped with phosphoric acid, was developed and implemented using a commercially available finite element software. Three types of flow-fields were modeled and simulated. Selected simulation results at reference operating conditions were compared to the performance curves and to segmented solid-phase temperature and current density measurements. For the segmented measurements, an inhouse developed prototype cell was designed and manufactured. The segmented cell was successfully operated and the solid-phase temperature and the current density distribution were recorded, evaluated, and discussed. Sequentially scanned segmented electrochemical impedance spectroscopy measurements were performed to qualitatively support the observed trends. These measurements were used to identify and determine the causes of the inhomogeneous current density distributions. An equivalent circuit model was developed, the obtained spectra were analyzed, and the model parameters discussed. This work helps to provide a better understanding of the internal behaviour of a running high temperature polymer electrolyte membrane fuel cell and presents valuable data for modeling and simulation. For large fuel cells and complete fuel cell stacks in particular, well designed anode and cathode inlet and outlet sections are expected to aid in achieving flatter quantities distributions and in preventing hot spots over the membrane electrode assembly area, and to develop proper start-up, shut-down, and tempering concepts.
Author :
Publisher :
ISBN 13 :
Total Pages : 600 pages
Book Rating : 4.3/5 (91 download)
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1962 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adewale Giwa
Publisher : Elsevier
ISBN 13 : 0443140065
Total Pages : 525 pages
Book Rating : 4.4/5 (431 download)
Download or read book Electrochemical Membrane Technology written by Adewale Giwa and published by Elsevier. This book was released on 2024-01-23 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical Membrane Technology will have a strong impact on electrochemical and membrane separation research in the future and will contribute significantly to academic training and the well-being of human society. This book will include a comprehensive discussion of SWOT analysis of each electrochemical membrane technology, and the discussion of energy production from electrochemical membrane technologies in a separate chapter. This will be based theoretical and experimental studies on electrochemical membrane technologies and applications. Written for chemical and environmental engineers, professors and other university teachers, research scientists, graduate students, water treatment managers, research institutions, and Research and Development departments of industries involved in sustainable water treatment and coproduction of valuable products from water treatment technologies. Provides comparative analysis of energy production from electrochemical membrane technologies and a comprehensive analysis of the recent advances in these technologies Discusses the strengths, weaknesses, opportunities, and threats/challenges (SWOT) of each electrochemical membrane technology Addresses the importance energy co-production
Author : Michael Eikerling
Publisher : CRC Press
ISBN 13 : 1439854068
Total Pages : 567 pages
Book Rating : 4.4/5 (398 download)
Download or read book Polymer Electrolyte Fuel Cells written by Michael Eikerling and published by CRC Press. This book was released on 2014-09-23 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a systematic and profound account of scientific challenges in fuel cell research. The introductory chapters bring readers up to date on the urgency and implications of the global energy challenge, the prospects of electrochemical energy conversion technologies, and the thermodynamic and electrochemical principles underlying the op
Author : ConferenceSeries
Publisher : ConferenceSeries
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4./5 ( download)
Download or read book Proceedings of 2nd International Conference on Battery & Fuel Cell Technology 2017 written by ConferenceSeries and published by ConferenceSeries. This book was released on with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: July 27-28, 2017 Rome, Italy Key Topics : Primary Batteries, Secondary Batteries, Theory of Batteries, Design and Technology of Batteries, Latest Developments in Batteries, Batteries in Renewable Sources, Applications of Batteries, Classification of Fuel Cells, Applications of Fuel cells, Super capacitors vs. Battery, Various Energy Materials, Hydrogen Energy, Nanotechnology in Advance Batteries,
Author : Samuel Cruz-Manzo
Publisher : Elsevier
ISBN 13 : 0323914322
Total Pages : 388 pages
Book Rating : 4.3/5 (239 download)
Download or read book Electrochemical Phenomena in the Cathode Impedance Spectrum of PEM Fuel Cells written by Samuel Cruz-Manzo and published by Elsevier. This book was released on 2022-06-18 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical Phenomena in the Cathode Impedance Spectrum of PEM Fuel Cells: Fundamentals, Modelling, and Applications establishes how the electrochemical and diffusion mechanisms of a polymer electrolyte membrane fuel cell (PEMFC) are related to electrochemical impedance spectroscopy (EIS) measurements using physics-based impedance models derived from fundamental electrode and diffusion theories. The contribution of the different phenomena occurring at the different layers comprising the cathode on the impedance response of the PEMFC is revealed through EIS-modelling analysis. The relation between EIS measurements and polarisation curves representing the performance of PEMFCs is established. Insight is gained into how the EIS response of the PEMFC changes at different operating conditions e.g. relative humidity, load demand, gas reactant stoichiometry and temperature using physics-based impedance models. The application of impedance models with EIS measurements carried out in the individual cells comprising a PEMFC stack is demonstrated, while recent modelling approaches and other impedance models reported in the literature to represent the EIS response of the PEMFC are also considered and discussed. Provides further understanding of ambiguities during the interpretation of the electrochemical impedance spectrum of the PEMFC Includes impedance models written in MATLAB® for replication or application to other PEMFC-EIS measurements Includes impedance spectra of the PEMFC at different operating conditions, electro/diffusion pathways for derivation of the impedance models and flowcharts for application of the impedance models with real-world measured EIS data
