Diffusion Und Chemische Reaktionen In Der Gas Feststoff Katalyse
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Diffusion Und Chemische Reaktionen In Der Gas Feststoff Katalyse
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Author : Frerich Keil
language : de
Publisher: Springer-Verlag
Release Date : 2013-03-07
Diffusion Und Chemische Reaktionen In Der Gas Feststoff Katalyse written by Frerich Keil and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-07 with Science categories.
Die modernen Entwicklungen der Theorie der CRT werden beschrieben und umfangreich dokumentiert. Für die praktische Anwendung werden diese Modelle eingeordnet und bewertet. Die Modelle der Katalyse und Diffusionsphänomene werden detailliert behandelt, insbesondere in porösen Medien (Zeolithen, Clays, Nanotubes). Moderne theoretische Methoden wie Molekulardynamik, Monte Carlo- und Quantenchemie werden dargestellt. Adsorption und Desorption in der Katalyse werden sowohl theoretisch als auch experimentell eingehend beschrieben. Zusätzlich wird sehr umfassend die vorhandene Literatur behandelt und bewertet. Damit ist das Buch eine sehr umfassende Darstellung des Status quo, zur Einarbeitung und als Übersicht für Ingenieure und Wissenschaftler in Forschung, Entwicklung und Lehre, in Chemie, chemischer Technik/Verfahrenstechnik und angrenzenden Gebieten.
Modellierung Der Prozesse In Katalytischen Rekombinatoren
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Author : Jörg Böhm
language : de
Publisher: Forschungszentrum Jülich
Release Date : 2007
Modellierung Der Prozesse In Katalytischen Rekombinatoren written by Jörg Böhm and has been published by Forschungszentrum Jülich this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Catalysis categories.
Transport Interactions Between Gas And Water In Thin Hydrophobic Porous Layers
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Author : Stefan Dwenger
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2016-01-29
Transport Interactions Between Gas And Water In Thin Hydrophobic Porous Layers written by Stefan Dwenger and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-01-29 with Technology & Engineering categories.
In the last decades it has become clear that the transport of gas and water inside the mixed-wettable gas diffusion medium (GDL) plays a significant role for the improved understanding and optimization of the polymer electrolyte membrane fuel cells (PEMFC). In the present thesis the influence of liquid water and gas on the transport properties of gas diffusion media of polymer electrolyte membrane fuel cells (PEMFC) is examined numerically and experimentally. The different arising transport mechanisms and their influence as well as their representation in theoretical models (especially REV-based Darcy models) are presented. Moreover, an approach for modelling and simulation of the water distribution inside mixed-wettable porous media, especially gas diffusion layers, is discussed. To this end, a thermodynamical-based approach is chosen - the interactions between gaseous, liquid, and solid (carbon and PTFE) phases are treated with the help of a stationary scheme based on the interfacial energies which have to be minimized. For the optimization task itself the (parallel) simulated annealing approach is chosen and discussed. In addition algorithms for the generation and discretization of the virtual porous structures are described. Based on the results the modelling of constitutive relationships and transport parameters depending on water and PTFE content is performed. Besides that experiments for the measurement of those relationships are developed. A special focus is on the precise compression of the GDL sample and the influence on capillary pressure-saturation relationship, relative permeabilities, and effective diffusivities. Different apparatus for in- and through-plane measurements are developed. At the end the derived transport parameters and relationships are applied to a REV-based Darcy model which is compared with an integral experiment. The experimental setup is motivated by the counter-current flow regime of liquid water and gas at the cathode side of the PEMFC. It has been demonstrated that Darcy-flow based models for porous media are also applicable to thin technical porous layers.
Diffusion In Condensed Matter
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Author : Paul Heitjans
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-01-16
Diffusion In Condensed Matter written by Paul Heitjans and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-01-16 with Science categories.
This comprehensive, handbook-style survey of diffusion in condensed matter gives detailed insight into diffusion as the process of particle transport due to stochastic movement. It is understood and presented as a phenomenon of crucial relevance for a large variety of processes and materials. In this book, all aspects of the theoretical fundamentals, experimental techniques, highlights of current developments and results for solids, liquids and interfaces are presented.
Heterogene Katalyse
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Author : I. I. Ioffe
language : de
Publisher:
Release Date : 1975
Heterogene Katalyse written by I. I. Ioffe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Catalysis categories.
Adsorption And Diffusion
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Author : Hellmut G. Karge
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-06-17
Adsorption And Diffusion written by Hellmut G. Karge and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-06-17 with Science categories.
"Molecular Sieves - Science and Technology" covers, in a comprehensive manner, the science and technology of zeolites and all related microporous and mesoporous materials. The contributions are grouped together topically in such a way that each volume deals with a specific sub-field. Volume 7 treats fundamentals and analyses of adsorption and diffusion in zeolites including single-file diffusion. Various methods of measuring adsorption and diffusion are described and discussed.
Diffusion Fundamentals
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Author : Jörg Kärger
language : en
Publisher: Leipziger Universitätsverlag
Release Date : 2005
Diffusion Fundamentals written by Jörg Kärger and has been published by Leipziger Universitätsverlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Electrochemical Cell Calculations With Openfoam
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Author : Steven Beale
language : en
Publisher: Springer Nature
Release Date : 2022-05-06
Electrochemical Cell Calculations With Openfoam written by Steven Beale and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-06 with Technology & Engineering categories.
This unique book is at the nexus of modern software programming practices and electrochemical process engineering. It is the authoritative text on developing open source software for many applications, including: • fuel cells; • electrolyzers; and • batteries. Written by experts in the field in the open source computational fluid dynamics (CFD) code suite OpenFOAM, this book is intended for process engineering professionals developing practical electrochemical designs for industry, as well as researchers focused on finding tomorrow’s answers today. The book covers everything from micro-scale to cell-scale to stack-scale models, with numerous illustrations and programming examples. Starting from a clear explanation of electrochemical processes and simple illustrative examples, the book progresses in complexity through a range of diverse applications. After reading this book, the reader is able to take command and control of model development as an expert. The book is aimed at all engineers and scientists with basic knowledge of calculus and programming in C++.
Characterization Of Porous Solids Vi
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Author :
language : en
Publisher: Elsevier
Release Date : 2002-11-14
Characterization Of Porous Solids Vi written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-11-14 with Technology & Engineering categories.
This book contains 99 of the papers that were presented at the 6th in the series of Symposia on Characterization of Porous Solids held in Alicante, Spain, May 2002. Written by leading international specialists in the subject, the contributions represent an up-to-date and authoritative account of recent developments around the world in the major methods used to characterize porous solids. The book is a useful work of reference for anyone interested in characterizing porous solids, such as MCM-41 mesoporous materials, pillared clays, etc. Papers on pore structure determination using gas adsorption feature strongly, together with papers on small angle scattering methods, mercury porosimetry, microcalorimetry, scanning probe microscopies, and image analysis.
Advanced Data Analysis And Modelling In Chemical Engineering
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Author : Denis Constales
language : en
Publisher: Elsevier
Release Date : 2016-08-23
Advanced Data Analysis And Modelling In Chemical Engineering written by Denis Constales and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-23 with Technology & Engineering categories.
Advanced Data Analysis and Modeling in Chemical Engineering provides the mathematical foundations of different areas of chemical engineering and describes typical applications. The book presents the key areas of chemical engineering, their mathematical foundations, and corresponding modeling techniques. Modern industrial production is based on solid scientific methods, many of which are part of chemical engineering. To produce new substances or materials, engineers must devise special reactors and procedures, while also observing stringent safety requirements and striving to optimize the efficiency jointly in economic and ecological terms. In chemical engineering, mathematical methods are considered to be driving forces of many innovations in material design and process development. Presents the main mathematical problems and models of chemical engineering and provides the reader with contemporary methods and tools to solve them Summarizes in a clear and straightforward way, the contemporary trends in the interaction between mathematics and chemical engineering vital to chemical engineers in their daily work Includes classical analytical methods, computational methods, and methods of symbolic computation Covers the latest cutting edge computational methods, like symbolic computational methods