Download or read book Microreactors for Gas Liquid Reactions written by Kristin Hecht and published by Western Engineering, Inc.. This book was released on 2014-01-01 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread adoption of microreactors has been hindered by a lack of knowledge regarding rules and parameters needed for their design. This dissertation deals with the investigation of interfacial area and liquid mass transport in microreactors for gas/liquid reactions. Observations of a reduction in conversion occurring when changing from a glass laboratory device to a stainless steel process device motivated investigations into the effect of material and surface properties on the gas/liquid flow and reaction. This work takes a look inside the machined microstructures produced at the Institute for Micro Process Engineering of the Karlsruhe Institute of Technology and investigates the nature of the solid surfaces resulting from the machining process—the surface roughness and the contact angle of the resulting surface. The effect of wettability on gas/liquid flow in microreactors has been investigated in capillaries of various materials. The absorption of carbon dioxide into aqueous solutions of sodium hydroxide has been used to investigate gas/liquid flow and reaction in capillaries and in a microstructured falling film reactor. Under certain limiting assumptions depending upon the exact rates of reaction and transport, values of the interfacial area and liquid mass transport coefficient can be derived from measurements of reaction. This dissertation contributes a small step towards a better understanding of how measurements of the interfacial area and mass transfer coefficient can be performed, demonstrates why the effect of material wettability cannot be ignored, and provides a stronger basis for further work in the development of general correlations describing microstructured gas/liquid reactors.
Download or read book Continuous Flow Gas liquid Reactions in Micro reactors and Its Applications in Catalytic Synthesis written by Fanfu Guan and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinetic Studies of Gas liquid Reactions in Capillary Microreactors written by Chara Psyrraki and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Micro Process Engineering written by Volker Hessel and published by John Wiley & Sons. This book was released on 2004-04-12 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: A MULTI-FACETED, HIERARCHIC ANALYSIS OF CHEMICAL MICRO PROCESS TECHNOLOGY Micro Reactor Differentiation and Process Intensification Consequences of Chemical Micro Processing Physical and Chemical Implications Impact on Chemical Engineering Impact on Process Engineering Impact on Process Results Impact on Society and Ecology Impact on Economy Application Fields and Markets of Micro Reactors MODELLING AND SIMULATION OF MICRO REACTORS Flow Phenomena on the Microscale Methods of Computational Fluid Dynamics Flow Distributions Heat Transfer Mass Transfer and Mixing Reaction Kinetics and Modelling Free Surface Flow Flow in Porous Media GAS-PHASE REACTIONS Catalyst Coatings in Micro Channels Micro Reactors for Gas-Phase Reactions Oxidations Hydrogenations Dehydrogenations Substitutions Eliminations Additions and Coupling Reactions LIQUID- AND LIQUID/LIQUID-PHASE REACTIONS Micro Reactors for Liquid-Phase and Liquid/Liquid-Phase Recations Aliphatic Nucleophilic and Electrophilic Substitution such as Esterification, Acylation of Amines, Thiocyanation, and much more Aromatic Electrophilic and Nucleophilic Substitution such as Nitrations, Amino-de-halogenations, Diazo Chemistry, and much more Metal-catalysed Aromatic Substitution such as Suzuki and Sonogashira Couplings, and more Free Radical Substitution such as Alkane Nitration Addition to Carbon-Carbon and Carbon-hetero Multiple Bonds such as the Michael Addition, the Diels-Alder-Reaction, the Aldol Reaction, and much more Oxidations and Reductions Eliminations and Rearrangements Inorganic Reactions such as the Belousov-Zhabotinskii-Reaction, Complex Formations, and much more GAS/LIQUID CONTACTING Micro Reactors for Gas/Liquid Contacting Aromatic Electrophilic Substitution such as Direct Fluorinations Free Radical Substitution such as Alkane Fluorinations and Chlorinations Addition to Carbon-Carbon and Carbon-hetero Multiple Bonds such as Nitro-group Hydrogenation, Cycloalkane Hydrogenation, and more Oxidations and Reductions such as Alcohol Oxidation, Photo Diels-Alder Reactions, and more Inorganic Reactions such as Sulfite Oxidation.
Download or read book Kinetic Studies of Gas liquid Reactions in Capillary Microreactors written by C. Psyrraki and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Micro Process Engineering written by Volker Hessel and published by Wiley-VCH. This book was released on 2005-07-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro process engineering is approaching both academia and industry. With the provision of micro devices and systems by commercial suppliers, one main barrier for using these units has been eliminated. This work focuses on processes rather than on devices: what is 'before' and 'behind' micro device fabrication - and gives a comprehensive and detailed overview on - A multi-faceted, hierarchic analysis of chemical micro process technology - Modelling and simulation of micro reactors - Liquid- and liquid/liquid-phase reactions - Gas/liquid reactions - Gas-phase reactions (heterogeneous catalysis) - Plants and applications like mixing, emulsion formation, heat exchange, organic and inorganic synthesis, multiphase and gas phase processes, periodic concentration and temperature cycling, catalyst screening, fine-chemical production, cosmetic, food, and others.
Download or read book Microreaction Technology written by M. Matlosz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: IMRET 5 featured more than 80 oral and poster communications, covering the entire interdisciplinary field from design, production, modeling and characterization of microreactor devices to application of microstructured systems for production, energy and transportation, including many analytical and biological applications. A particularly strong topic was the investigation of the potential of microstructuring of reactors and systems components for process intensification. Perspectives of combining local, in situ, data acquisition with appropriate microstructuring of actuators and components within chemical and biological devices were explored in order to enhance process performance and facilitate process control.
Download or read book Microreactors written by Wolfgang Ehrfeld and published by . This book was released on 2000 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents general aspects of microreaction technology. Discusses in detail microfabrication techniques, micromixers, micro heat exchangers, microseparation systems, micosystems for liquid and gas phase reactions, gas/liquid microreactors, and microsystems for energy generation, catalyst, and material screening.
Download or read book Microreactors in Organic Chemistry and Catalysis written by Thomas Wirth and published by John Wiley & Sons. This book was released on 2013-02-22 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the second edition of 'Microreactors in Organic Chemistry and Catalysis' all chapters have been revised and updated to reflect the latest developments in this rapidly developing field. This new edition has 60% more content, and it remains a comprehensive publication covering most aspects of the topic. The use of microreactors in homogeneous, heterogeneous as well as biphasic reactions is covered in the main part of the book, together with catalytic, bioorganic and automation approaches. The initial chapters also provide a solid physical chemistry background on fluidics in microdevices. Finally, a chapter on industrial applications and developments covers recent progress in process chemistry. An excellent reference for beginners and experts alike.
Download or read book Gas liquid Two phase Flow and Reaction in Microstructured Reactors written by N. Shao and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis presents investigations on two-phase gas-liquid microstructured reactors operating in Taylor flow and the dependence of reactor performance on design parameters. Literature review revealed that flow patterns in microchannels are affected not only by channel dimension, fluids flowrates and surface tension, but also by wall wettability and gas inlet size. A universal flow regime map does not seem to exist. The hydrodynamic parameters of Taylor flow were investigated both by Computational Fluid Dynamics simulations and experiments in microstructures with sizes 0.3mm - 1mm and various inlet configurations such as T- and Y- junctions fabricated in-house. The same parameters that influence flow patterns and their transitions were also found to affect Taylor bubble sizes. To account for the effect of inlet conditions, correlations were developed for predicting bubble/slug size in the T- and Y- inlet geometries that were used subsequently. Mass transfer with and without chemical reaction was investigated numerically in Taylor flow microreactors using CO2 physical absorption into water or chemical absorption into NaOH aqueous solution. Chemical absorption was enhanced by a factor of 3-18 over physical absorption. With reaction present, the reactor performance depended mainly on the gas-liquid interfacial area, while mixing within the phases was only important in physical absorption. This agreed with the experimental results of a similar reaction system, which showed that bifurcating main channels, where new interfaces are generated, significantly improved reaction conversion while meandering channels that enhance liquid mixing had little impact. Finally, the performance of a Taylor flow microreactor was evaluated for an industrial fast gas-liquid reaction of CO2 absorption from fuel gas into amine solutions. The Taylor flow microreactor offered the largest specific area and the smallest reactor volume compared to other microreactor types. However, in order to meet absorption specifications for the case considered multistage absorption would have been necessary.
Download or read book Microreactors in Organic Synthesis and Catalysis written by Thomas Wirth and published by John Wiley & Sons. This book was released on 2008-05-05 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This one-stop reference is the first book on this emerging and rapid developing field with a focus on synthesis and catalysis. As such, it covers all aspects from academia and industry in a clearly structured way. Leading experts provide the background information as an initial aid for newcomers to the field, while chapters on different reaction types and industrial applications make this an equally vital resource for specialists. From the contents: - Introduction and background - Fabrication of microractors - Properties and use of microreactors - Organic chemistry in microreactors - Homogeneous reactions (including photochemical and electrochemical reactions) - Heterogeneous reactions - Biphasic reactions (liquid/liquid, liquid/gas) - Bioorganic reactions - Industrial applications Thomas Wirth is Professor of Organic Chemistry at Cardiff University in Wales. After a postdoctoral stay with Kaoru Fuji at Kyoto University as a JSPS fellow, he started his independent research in the group of Bernd Giese in Basel, Switzerland. He was invited as a visiting professor to various places: University of Toronto, Canada (1999), Chuo University in Tokyo, Japan (2000), Osaka University, Japan (2004). He was awarded the Werner-Prize from the New Swiss Chemical Society in 2000. He is the author of about 80 publications and has written or edited 4 books.
Download or read book Microreaction Technology Industrial Prospects written by W. Ehrfeld and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: Miniaturization has cost and time-saving advantages for numerous applications in chemistry, pharmacy, medicine and biotechnology. Additionally, microreaction technology offers new solutions for the automobile industry and environmental technology, e.g. fuel cells, or mobile sensor systems for on-the-spot analysis. Therefore, the 3rd International Conference on Microreaction Technology - IMRET 3 is an important forum for creating awareness of the wide variety of the new trends in this up-and-coming discipline.
Download or read book Micro Reaction Technology in Organic Synthesis written by Charlotte Wiles and published by CRC Press. This book was released on 2016-04-19 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: While continuous processes have found widespread application within chemical production, members of the research and development communities have historically favored the centuries old technique of iterative batch reactions. With the exception of combinatorial and microwave chemistry, little had been done to change the way that synthetic chemists c
Download or read book Measurement and Enhancement of Gas liquid Mass Transfer in Micro scale Reactors written by Yunying Fan and published by . This book was released on 2005 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Engineering of Microreactor and Smart Scaled Flow Processes written by Volker Hessel and published by MDPI. This book was released on 2018-10-08 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Design and Engineering of Microreactor and Smart-Scaled Flow Processes" that was published in Processes
Download or read book Microreactors in Organic Synthesis and Catalysis written by Thomas Wirth and published by John Wiley & Sons. This book was released on 2008-09-08 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This one-stop reference is the first book on this emerging and rapid developing field with a focus on synthesis and catalysis. As such, it covers all aspects from academia and industry in a clearly structured way. Leading experts provide the background information as an initial aid for newcomers to the field, while chapters on different reaction types and industrial applications make this an equally vital resource for specialists.
Download or read book The Manufacture of Lubricants written by Richard Brunnerl and published by . This book was released on 1916 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
