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tesis Acceso Abierto

El transporte del petróleo crudo y gas natural en la República Argentina

Héctor Améndola

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libros

Electrochemical Energy Storage for Renewable Sources and Grid Balancing

Identificadores:  ISBN 978-0-444-62616-5 (en línea)

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Electricity from renewable sources of energy is plagued by fluctuations (due to variations in wind strength or the intensity of insolation) resulting in a lack of stability if the energy supplied from such sources is used in ‘real time’. An important solution to this problem is to store the energy electrochemically (in a secondary battery or in hydrogen and its derivatives) and to make use of it in a controlled fashion at some time after it has been initially gathered and stored. Electrochemical battery storage systems are the major technologies for decentralized storage systems and hydrogen is the only solution for long-term storage systems to provide energy during extended periods of low wind speeds or solar insolation. Future electricity grid design has to include storage systems as a major component for grid stability and for security of supply. The technology of systems designed to achieve this regulation of the supply of renewable energy, and a survey of the markets that they will serve, is the subject of this book. It includes economic aspects to guide the development of technology in the right direction.

  • Provides state-of-the-art information on all of the storage systems together with an assessment of competing technologies
  • Features detailed technical, economic and environmental impact information of different storage systems
  • Contains information about the challenges that must be faced for batteries and hydrogen-storage to be used in conjunction with a fluctuating (renewable energy) power supply
libros

Electrochemical Micromachining for Nanofabrication, MEMS and Nanotechnology

Identificadores:  ISBN 978-0-323-32737-4 (en línea)

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Electrochemical Micromachining for Nanofabrication, MEMS and Nanotechnology is the first book solely dedicated to electrochemical micromachining (EMM). It begins with fundamentals, techniques, processes, and conditions, continuing with in-depth discussions of mechanisms of material removal, including an empirical model on the material removal rate for EMM (supported by experimental validation). The book moves next to construction-related features of EMM setup suitable for industrial micromachining applications, varying types of EMM, and the latest developments in the improvement of EMM setup. Further, it covers power supply, roll of electrolyte, and other major factors influencing EMM processes, and reports research findings concerning the improvement of machining accuracy and efficiency. Finally, the book devotes a chapter to the design and development of micro-tools, one of the most vital components in EMM.
  • Covers the generation of micro features used for advanced engineering of materials for fabrication of MEMS, microsystems and other micro-engineering applications
  • Explores the trend of decreasing size of fabricated devices, reflected in coverage of generation of high-precision nano-features on metal and semiconductors utilizing SPM, STM, and AFM, and nanotechnology aspects of EMM
  • Describes nanofabrication utilizing anodic dissolutions for mass manufacturing by overcoming obstacles utilizing electrochemical microsystem technology (EMST) and electrochemical nanotechnology (ENT)
libros

Electrocorrosion and Protection of Metals: General Approach with Particular Consideration to Electrochemical Plants

Identificadores:  ISBN 978-0-444-53295-4 (en línea)

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Electrocorrosion, the corrosion of metallic constructions by external currents, is the most significant factor in conductive aggressive environments. Corrosion of underground and underwater metal constructions by stray currents has been comprehensively studied in the past decades and is considered here only in the form of a review. The primary attention is on corrosion, by external anodic (mainly) and cathodic currents, of metal constructions in the highly aggressive environments typical for electrochemical plants, where penetration of the external currents (leakage currents) from the electrolytic baths into metal constructions is unavoidable.   A new approach to the problem of electrocorrosion protection of passive structural metals is considered in this book,  keeping the metals attacked by external currents in the boundaries of their passive field. The systems, developed in accordance with this approach, are based on the modification of existing and elaboration of new methods of electrocorrosion protection. These systems take into account corrosion and electrochemical characteristics of the aggressive media (redox potential, conductivity etc.) and of the passive metal (corrosion and activation potentials, current density in a passive state, etc) as well as the sizes and distribution character of the external currents.

The book covers analysis of leakage current distributions in electrochemical plants, their influence, methods to estimate corrosion stability of metallic structures subject to external currents and presents many concrete examples of the successful introduction of corrosion protection systems in operating plants.

  • A new approach to protection from electrocorrosion, taking into account the passive state of the metal in aggressive media
  • Newly developed and modifications of well known methods of electrocorrosion protection are presented.
  • Systematized data on electrocorrosion and protection of metals, especially in electrochemical plants, allow corrosion engineers, researchers and personnel maintaining the equipment of electrochemical plants to analyze the corrosion state of  metallic equipment and prevent electrocorrosion.
tesis Acceso Abierto

Electrodos de tecnología avanzada para sistemas de conversión de energía

Silvina Gabriela Ramos ; W. E. Triaca ; Gustavo Andreasen ; Manuel López Teijelo ; Vicente Antonio Macagno

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El objetivo general de la tesis doctoral ha sido el desarrollo de electrodos selectivos de tecnología avanzada para su uso en celdas de combustible de hidrógeno/oxígeno de alta eficiencia que operan a baja temperatura. A tal fin, se prepararon electrocatalizadores de nanopartículas de Pt con orientación cristalográfica preferencial (111), los cuales exhiben la mayor actividad catalítica para la reacción de electrorreducción de oxígeno, cuya cinética lenta es una de las principales limitaciones en el proceso de conversión de energía. La obtención de las nanopartículas sobre sustratos carbonosos se realizó mediante la aplicación de una técnica de electrólisis pulsante. Se diseñaron y construyeron electrodos porosos de difusión de gas catalizados con los que se construyeron ensambles electrodo-membrana de intercambio de protones (PEM)-electrodo. Se diseñó y construyó un prototipo de celda de combustible unitaria de hidrógeno/oxígeno de tecnología PEM y se evaluó su comportamiento en operación y estabilidad a tiempos largos. Se determinó que la incorporación en el cátodo de los electrocatalizadores de Pt altamente facetados tipo (111), desarrollados en el transcurso de la tesis, mejoran el comportamiento en operación de la celda de combustible de hidrógeno/oxígeno de tecnología PEM. Finalmente, se elaboró un protocolo de testeo para celdas de combustible de hidrógeno/oxígeno PEM.
libros

Electromagnetic Aquametry: Electromagnetic Wave Interaction with Water and Moist Substances

Identificadores:  ISBN 978-3-540-22222-4 (impreso) 978-3-540-26491-0 (en línea)

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libros

Electron Beam Pasteurization and Complementary Food Processing Technologies

Identificadores:  ISBN 978-1-78242-100-9 (en línea)

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Food safety is a constant challenge for the food industry, and food irradiation technology has developed significantly since its introduction, moving from isotope irradiation to the use of electron beam technology. Electron Beam Pasteurization and Complementary Food Processing Technologies explores the application of electron beam pasteurization in conjunction with other food processing technologies to improve the safety and quality of food. Part one provides an overview of the issues surrounding electron beam pasteurization in food processing. Part two looks at different thermal and non-thermal food processing technologies that complement irradiation. Finally, a case study section on the commercial applications of e-beam processing provides examples from industry.
libros

Electron-Beam Technology in Microelectronic Fabrication

Identificadores:  ISBN 978-0-12-133550-2 (en línea)

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Electron-Beam Technology in Microelectronic Fabrication presents a unified description of the technology of high resolution lithography. This book is organized into six chapters, each treating a major segment of the technology of high resolution lithography.
The book examines topics such as the physics of interaction of the electrons with the polymer resist in which the patterns are drawn, the machines that generate and control the beam, and ways of applying electron-beam lithography in device fabrication and in the making of masks for photolithographic replication. Chapter 2 discusses fundamental processes by which patterns are created in resist masks. Chapter 3 describes electron-beam lithography machines, including some details of each of the major elements in the electron-optical column and their effect on the focused electron beam. Chapter 4 presents the use of electron-beam lithography to make discrete devices and integrated circuits. Chapter 5 looks at the techniques and economics of mask fabrication by the use of electron beams. Finally, Chapter 6 presents a comprehensive description and evaluation of the several high resolution replication processes currently under development.
This book will be of great value to students and to engineers who want to learn the unique features of high resolution lithography so that they can apply it in research, development, or production of the next generation of microelectronic devices and circuits.
libros

Electronic Irradiation of Foods: An Introduction to the Technology

R. B. Miller
Identificadores:  ISBN 978-0-387-23784-8 (impreso) 978-0-387-28386-9 (en línea)

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revistas

Electronic Journal of Environmental, Agricultural and Food Chemistry

Identificadores:  ISSN 1579-4377 (impreso)

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