Download or read book Applications of Hydrogenation and Dehydrogenation on Noble Metal Catalysts written by Bo Wang and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogenation and dehydrogenation on Pd- and Pt- catalysts are encountered in many industrial hydrocarbon processes. The present work considers the development of catalysts and their kinetic modeling along a general and rigorous approach. The first part deals with the kinetics of selective hydrogenation, more particularly of the C3 cut of a thermal cracking unit for olefins production. The kinetics of the gas phase selective hydrogenation of methyl-acetylene (MA) and propadiene (PD) over a Pd/y-alumina catalyst were investigated in a fixed bed tubular reactor at temperatures 60 - 80 oC and a pressure of 20 bara. Hougen-Watson type kinetic equations were derived. The formation of higher oligomers slowly deactivated the catalyst. The effect of the deactivating agent on the rates of the main reactions as well as on the deactivating agent formation itself was expressed in terms of a deactivation function multiplying the corresponding rates at zero deactivation. Then, the kinetic model was plugged into the reactor model to simulate an industrial adiabatic reactor. In the second part the production of hydrogen from hydrocarbons was investigated. In both cyclohexane and decalin dehydrogenations, conversions higher than 98% could be obtained over Pd/y-alumina catalyst at temperature of 320 and 340 oC, respectively, with no apparent deactivation for 30 h and with co-feed of H2 in the feed. Except for H2 and trace amounts of side cracking products, less than 0.01%, benzene was the only dehydrogenated product in cyclohexane dehydrogenation. In the case of decalin dehydrogenation, partially dehydrogenated product, tetralin, was also formed with selectivity lower than 5%, depending on operating conditions. A rigorous Hougen-Watson type kinetic model was derived, which accounted for both the dehydrogenation of cis- and trans- decalin in the feed and also the isomerization of the two isomers. Jet A is the logic fuel in the battlefields. The dehydrogenation of Jet A can produce H2 for military fuel cell application. Although the H2 production is lower than that of steam/autothermal reforming, it eliminates the needs of high temperature and product separation operation.
Download or read book Catalysis by Precious Metals Past and Future written by Marcela Martinez Tejada and published by MDPI. This book was released on 2020-04-15 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future of the precious metals is shiny and resistant. Although expensive and potentially replaceable by transition metal catalysts, precious metal implementation in research and industry shows potential. These metals catalyze oxidation and hydrogenation due to their dissociative behavior toward hydrogen and oxygen, dehydrogenation, isomerization, and aromatization, etc. The precious metal catalysts, especially platinum-based catalysts, are involved in a variety of industrial processes. Examples include Pt–Rh gauze for nitric acid production, the Pt/Al2O3 catalyst for cyclohexane and propylene production, and Pd/Al2O3 catalysts for petrochemical hydropurification reactions, etc. A quick search of the number of published articles in the last five years containing a combination of corresponding “metals” (Pt, Pd, Ru, Rh and Au) and “catalysts” as keywords indicates the importance of the Pt catalysts, but also the continuous increase in the contribution of Pd and Au. This Special Issue reveals the importance of precious metals in catalysis and focuses on mono- and bi-metallic formulations of any supported precious metals and their promotional catalytic effect of other transition metals. The application of precious metals in diverse reactions, either homogeneous or heterogeneous, and studies of the preparation, characterization, and applications of the supported precious metal catalysts, are presented.
Download or read book Non Noble Metal Catalysis written by Robertus J. M. Klein Gebbink and published by John Wiley & Sons. This book was released on 2018-12-31 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: An expert overview of current research, applications, and economic and environmental advantages The study and development of new homogeneous catalysts based on first-row metals (Mn, Fe, Co, Ni, and Cu) has grown significantly due to the economic and environmental advantages that non-noble metals present. Base metals offer reduced cost, greater supply, and lower toxicity levels than noble metals?enabling greater opportunity for scientific investigation and increased development of practical applications. Non-Noble Metal Catalysis provides an authoritative survey of the field, from fundamental concepts and computational methods to industrial applications and reaction classes. Recognized experts in organometallic chemistry and homogeneous catalysis, the authors present a comprehensive overview of the conceptual and practical aspects of non-noble metal catalysts. Examination of topics including non-innocent ligands, proton-coupled electron transfer, and multi-nuclear complexes provide essential background information, while areas such as kinetic lability and lifetimes of intermediates reflect current research and shifting trends in the field. This timely book demonstrates the efficacy of base metal catalysts in the pharmaceutical, fine-chemical, and agrochemical industries, addressing both environmental and economic concerns. Providing essential conceptual and practical exploration, this valuable resource: -Illustrates how unravelling new reactivity patterns can lead to new catalysts and new applications -Highlights the multiple advantages of using non-noble metals in homogenous catalysis -Demonstrates how the availability of non-noble metal catalysis reduces costs and leads to immense savings for the chemical industry -Reveals how non-noble metal catalysis are more sustainable than noble metals such as palladium or platinum Non-Noble Metal Catalysis: Molecular Approaches and Reactions is an indispensable source of up-to-date information for catalytic chemists, organic chemists, industrial chemists, organometallic chemists, and those seeking to broaden their knowledge of catalytic chemistry.
Download or read book Chemistry of Dehydrogenation Reactions and Its Applications written by Syed Shahabuddin and published by CRC Press. This book was released on 2024-02-21 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book focuses on advancement in the application of heterogeneous catalytic materials for the dehydrogenative synthesis of valuable organic compounds from substrates such as alcohols and simple aliphatic compounds. Several heterogeneous transition metals-based catalytic materials are explored for the synthesis of valuable chemicals for industrial applications. The book provides insight into the application of state-of-the-art technology for energy utilization and clean chemical synthesis. Features: Offers a wide overview of dehydrogenation catalytic chemistry catalyzed by transition metals and their compounds. Helps design novel and more benign and uncomplicated protocols for the synthesis of valuable chemicals from readily available raw materials. Provides deeper insight into the aspect of dehydrogenation reactions for clean chemical synthesis via a cascade process. Summarizes new mechanistic details of dehydrogenation reactions, experimental side development and applications of dehydrogenation techniques. Explores alternative solutions for the assimilation and transportation of clean energy in the form of hydrogen energy utilization. This book is aimed at graduate students and researchers in chemical engineering, chemistry, catalysis, organic synthesis, pharmaceutical chemistry and petrochemistry.
Download or read book Catalytic Ignition of Hydrogen and Hydrogen Hydrocarbon Blends Over Noble Metals written by Nickolai M. Rubtsov and published by Springer Nature. This book was released on 2023-06-01 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the issues on noble metal influence on gaseous combustion. The book focuses on the new data on combustion processes having practical applications and includes fire safety issues in the use of noble metals in hydrogen recombiners for NPP, as well as in catalytically stabilized (CS) combustion technology including stimulation of combustion of hydrogen-blended hydrocarbons, synthesis of carbon nanotubes, and determination of catalytic ignition limits in noble metal-hydrogen-hydrocarbon systems to meet the challenges of explosion safety.
Download or read book Catalysis written by James J Spivey and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an increasing challenge for chemical industry and research institutions to find cost-efficient and environmentally sound methods of converting natural resources into fuels chemicals and energy. Catalysts are essential to these processes and the Catalysis Specialist Periodical Report series serves to highlight major developments in this area. This series provides systematic and detailed reviews of topics of interest to scientists and engineers in the catalysis field. The coverage includes all major areas of heterogeneous and homogeneous catalysis and also specific applications of catalysis such as NOx control kinetics and experimental techniques such as microcalorimetry. Each chapter is compiled by recognised experts within their specialist fields and provides a summary of the current literature. This series will be of interest to all those in academia and industry who need an up-to-date critical analysis and summary of catalysis research and applications. Catalysis will be of interest to anyone working in academia and industry that needs an up-to-date critical analysis and summary of catalysis research and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading experts in their specialist fields, this series is designed to help the chemistry community keep current with the latest developments in their field. Each volume in the series is published either annually or biennially and is a superb reference point for researchers. www.rsc.org/spr
Download or read book Supported Metals in Catalysis written by James Arthur Anderson and published by World Scientific. This book was released on 2012 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from experts in supported metal catalysis, from both the industry and academia, this book presents the latest developments in characterization and application of supported metals in heterogeneous catalysis. In addition to a thorough and updated coverage of the traditional aspects of heterogeneous catalysis such as preparation, characterization and use in well-established technologies such as Naphtha reforming, the book also includes emerging areas where supported metal catalysis will make significant contributions in future developments, such as fuel cells and fine chemicals synthesis. The second edition of Supported Metals in Catalysis comes complete with new and updated chapters containing important summaries of research in a rapidly evolving field. Very few other books deal with this highly pertinent subject matter, and as such, it is a must-have for anyone working in the field of heterogeneous catalysis.
Download or read book New Advances in Hydrogenation Processes written by Maryam Takht Ravanchi and published by BoD – Books on Demand. This book was released on 2017-01-25 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen is one of the abundant elements on earth majorly in the form of water (H2O) and mainly as hydrogen gas (H2). Catalytic hydrogenation is a key reaction that has versatile applications in different industries. The main objective of this book is to bring together various applications of hydrogenation through the perspective of leading researchers in the field. This book is intended to be used as a graduate-level text book or as a practical guide for industrial engineers.
Download or read book Evaluation of Perhydrodibenzyltoluene Dehydrogenation Parameters and Durability Using Noble Metal Catalysts for Hydrogen Production written by and published by . This book was released on 2021 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen storage -- Degree of dehydrogenation -- Accelerated stress test -- Liquid organic hydrogen carriers -- Hydrogen purity -- Density functional theory -- Two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (2D-GC-TOF-MS) -- Single quadrupole-mass spectrometry gas chromatography (GC-SQ-MS)
Download or read book Dehydrogenation Reactions with 3d Metals written by Basker Sundararaju and published by Springer Nature. This book was released on 2024-02-07 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book recent developments in dehydrogenation reactions catalyzed by 3d-metals are discussed. With continue efforts to develop sustainable chemical production the discovery of new catalysts and catalytic procedures for (de)hydrogenation reactions are a subject of great interest to the chemistry community. Additionally, (de)hydrogenation reactions enable the creation of closed-loop production cycles that support a circular economy. The chapters presented include the synthesis of heterocycles and tandem-multicomponent (three or more) reactions through dehydrogenative strategy, as well as the conversion of ethanol to n-butanol, higher oxidized hydrocarbons like acids, ester, amides from alcohols, α-alkylation of amines, ketones, and amides with alcohols and mechanistic understanding of dehydrogenation reactions with high-valent metals. With contributions from experts in the field, the book is a valuable resource for scholars working in the field of organometallic chemistry, catalysis, medicinal chemistry, as well as researchers in the industry.
Download or read book Catalytic Hydrogenation over Platinum Metals written by Paul Rylander and published by Elsevier. This book was released on 2012-12-02 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic Hydrogenation over Platinum Metals focuses on catalytic hydrogenation as an effective process in attaining controlled transformations of organic compounds. Composed of contributions of various authors, the book first provides information on catalysts, equipment, and conditions. Catalyst stability and reuse; types of catalyst; platinum metals; and synergism are covered. The text proceeds with discussions on hydrogenation reactors. Topics include atmospheric pressure reactors; low pressure reactors; microreactors; and high pressure reactors. The book also covers hydrogenation of carbon-carbon unsaturation. Catalytic metal; modified catalyst systems; stereochemistry; diacetylenes; and hydrogenolysis are discussed. The text also looks at the hydrogenation of aromatics, nitrogen and carbonyl compounds, and hydrogenolysis. Numerical representations and analysis, diagrams, and reactions of compounds when exposed to different laboratory conditions are considered. The selection is a great source of data for readers interested in studying the process of catalytic hydrogenation.
Download or read book Petrochemical Catalyst Materials Processes and Emerging Technologies written by Al-Megren, Hamid and published by IGI Global. This book was released on 2016-02-17 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: ###############################################################################################################################################################################################################################################################
Download or read book Hydrogenation Over Supported Noble Metal Catalysts written by Martin Makosch and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Dehydrogenation Reactions and Its Applications written by Syed Shahabuddin and published by CRC Press. This book was released on 2024-02-21 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book focuses on advancement in the application of heterogeneous catalytic materials for the dehydrogenative synthesis of valuable organic compounds from substrates such as alcohols and simple aliphatic compounds. Several heterogeneous transition metals-based catalytic materials are explored for the synthesis of valuable chemicals for industrial applications. The book provides insight into the application of state-of-the-art technology for energy utilization and clean chemical synthesis. Features: Offers a wide overview of dehydrogenation catalytic chemistry catalyzed by transition metals and their compounds. Helps design novel and more benign and uncomplicated protocols for the synthesis of valuable chemicals from readily available raw materials. Provides deeper insight into the aspect of dehydrogenation reactions for clean chemical synthesis via a cascade process. Summarizes new mechanistic details of dehydrogenation reactions, experimental side development and applications of dehydrogenation techniques. Explores alternative solutions for the assimilation and transportation of clean energy in the form of hydrogen energy utilization. This book is aimed at graduate students and researchers in chemical engineering, chemistry, catalysis, organic synthesis, pharmaceutical chemistry and petrochemistry.
Download or read book Design and Applications of Hydroxyapatite Based Catalysts written by Doan Pham Minh and published by John Wiley & Sons. This book was released on 2022-06-15 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential reference for researchers and experts in industry highlighting the rapidly growing field of hydroxyapatite-based catalysts and their application in various chemical processes. Hydroxyapatite (Ca10(PO4)6(OH)2) is the main mineral component of human and animal bones. It is largely applied in the field of biomaterials due to its biocompatibility. Recently, hydroxyapatite-based materials have especially gained a lot of attention by researchers in catalysis, as they are versatile and have shown precious properties of a good catalyst and catalyst support such as excellent ion-exchange capacity, high porosity, very low water solubility, controlled basicity/acidity, and good thermal stability at high temperatures. Design and Applications of Hydroxyapatite-Based Catalysts gives a detailed overview of the synthesis, characterization, and use of hydroxyapatite-based materials in catalysis. It covers synthetic hydroxyapatites (from pure chemicals or waste), natural apatites and materials from eggshells and animal bones. The application of hydroxyapatite-based catalysts in selective oxidation, deoxygenation, selective hydrogenation, dehydrogenation reactions, organic synthesis, as well as reforming processes and production of energy carriers is reviewed. Moreover, electrocatalysis and photocatalysis using hydroxyapatite-based materials are discussed. Kinetic and mechanism studies of various chemical pro-cesses over hydroxyapatite-based catalysts are also presented. This is the first book solely dedicated to hydroxyapatite-based materials and their use in catalysis. Covers synthesis and characterization, surface and structure studies, kinetic and mechanism aspects, and various applications in heterogeneous catalysis, electrocatalysis, and photocatalysis. Aimed at further stimulating research in the field Design and Applications of Hydroxyapatite-Based Catalysts is an indispensable source-of-information for researchers in academia and industry working in catalysis.
Download or read book Hydrogenation Catalysts written by Robert J. Peterson and published by William Andrew. This book was released on 1977 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Homogeneous Hydrogenation written by P.A. Chaloner and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous hydrogenation is one of the most thoroughly studied fields of homogeneous catalysis. The results of these studies have proved to be most important for an understanding of the underlying principles of the activation of small molecules by transition metal complexes. During the past three decades homogeneous hydrogenation has found widespread application in organic chemistry, including the production of important pharmaceuticals, especially where a sophisticated degree of selectivity is required. This volume presents a general account of the main principles and applications of homogeneous hydrogenation by transition metal complexes. Special attention is devoted to the mechanisms by which these processes occur, and the role of the recently discovered complexes of molecular hydrogen is described. Sources of hydrogen, other than H2, are also considered (transfer hydrogenation). The latest achievements in highly stereoselective hydrogenations have made possible many new applications in organic synthesis. These applications are documented by giving details of the reduction of important unsaturated substrates (alkenes, alkynes, aldehydes and ketones, nitrocompounds, etc.). Hydrogenation in biphasic and phase transfer catalyzed systems is also described. Finally, a discussion of the biochemical routes of H2 activation highlights the similarities and differences in performing hydrogenation in both natural and synthetic systems. For researchers working in the fields of homogeneous catalysis, especially in areas such as pharmaceuticals, plastics and fine chemicals.
