Active Site Models For High Temperature Water Gas Shift Reaction Over Iron Oxide Catalysts

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Active Site Models for High Temperature Water Gas Shift Reaction Over Iron Oxide Catalysts

Author : Rainee VanNatter
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.:/5 (724 download)

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Book Synopsis Active Site Models for High Temperature Water Gas Shift Reaction Over Iron Oxide Catalysts by : Rainee VanNatter

Download or read book Active Site Models for High Temperature Water Gas Shift Reaction Over Iron Oxide Catalysts written by Rainee VanNatter and published by . This book was released on 2011 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum chemical calculations and microkinetic modeling were carried out to study the water gas shift reaction over iron oxide catalysts. Cluster models corresponding to potential active sites on (100), (110), and (111) surfaces of an Fe3O4 crystal were generated, and the mechanistic thermochemistry of water-gas shift studied by computational chemistry using these model surfaces. At the same time, microkinetic modelling was being used to study various proposed water gas shift mechanisms. These two sets of information were then compared to discriminate between potential reaction mechanisms and catalyst surface structures. Further studies were carried out with copper promoted catalyst clusters in an attempt to see if the clusters would predict the effect of copper on the reaction kinetics.

Water Gas Shift Reaction

Author : Panagiotis Smirniotis
Publisher : Elsevier
ISBN 13 : 0444633537
Total Pages : 280 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Water Gas Shift Reaction by : Panagiotis Smirniotis

Download or read book Water Gas Shift Reaction written by Panagiotis Smirniotis and published by Elsevier. This book was released on 2015-06-11 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water Gas Shift Reaction: Research Developments and Applications outlines the importance of hydrogen as a future fuel, along with the various hydrogen production methods. The book explains the development of catalysts for Water Gas Shift (WGS) reaction at different temperatures and steam/CO ratios, and also discussing the effect of different dopants on the WGS activity of iron oxide and the promotion and inhibition roles of the dopants on the WGS activity of iron oxide are explained. In addition, the book describes extensive characterization of modified ferrite catalysts, especially with Mossbauer spectroscopy and its advantage in understanding properties of metal doped ferrite catalysts, the exact dopant location, and its effect on electron hopping capability and WGS activity of Fe redox couple. - Outlines the importance of the Water Gas Shift Reaction and its application for hydrogen production - Provides detailed information on potential catalysts, their development, and their pros and cons, giving the reader insights on how modified ferrite catalysts work at different temperatures and different steam to CO ratios - Reviews hydrogen technology, its current importance, and production methods - Presents a clear presentation of the topics with many graphics and tables - Offers basic and advanced knowledge of catalysts characterization instrumental techniques

WATER-GAS SHIFT KINETICS OVER IRON OXIDE CATALYSTS AT MEMBRANE REACTOR CONDITIONS.

Author :
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis WATER-GAS SHIFT KINETICS OVER IRON OXIDE CATALYSTS AT MEMBRANE REACTOR CONDITIONS. by :

Download or read book WATER-GAS SHIFT KINETICS OVER IRON OXIDE CATALYSTS AT MEMBRANE REACTOR CONDITIONS. written by and published by . This book was released on 2001 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers the second year of a project investigating water-gas shift catalysts for use in membrane reactors. It has been established that a simple iron high temperature shift catalyst becomes ineffective in a membrane reactor because the reaction rate is severely inhibited by the build-up of the product CO2. During the past year, an improved microkinetic model for water-gas shift over iron oxide was developed. Its principal advantage over prior models is that it displays the correct asymptotic behavior at all temperatures and pressures as the composition approaches equilibrium. This model has been used to explore whether it might be possible to improve the performance of iron high temperature shift catalysts under conditions of high CO2 partial pressure. The model predicts that weakening the surface oxygen bond strength by less than 5% should lead to higher catalytic activity as well as resistance to rate inhibition at higher CO2 partial pressures. Two promoted iron high temperature shift catalysts were studied. Ceria and copper were each studied as promoters since there were indications in the literature that they might weaken the surface oxygen bond strength. Ceria was found to be ineffective as a promoter, but preliminary results with copper promoted FeCr high temperature shift catalyst show it to be much more resistant to rate inhibition by high levels of CO2. Finally, the performance of sulfided CoMo/Al2O3 catalysts under conditions of high CO2 partial pressure was simulated using an available microkinetic model for water-gas shift over this catalyst. The model suggests that this catalyst might be quite effective in a medium temperature water-gas shift membrane reactor, provided that the membrane was resistant to the H2S that is required in the feed.

Catalyst Handbook

Author : Martyn V. Twigg
Publisher : Routledge
ISBN 13 : 1351462326
Total Pages : 609 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Catalyst Handbook by : Martyn V. Twigg

Download or read book Catalyst Handbook written by Martyn V. Twigg and published by Routledge. This book was released on 2018-12-19 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book bridges the gap between theory and practice. It provides fundamental information on heterogeneous catalysis and the practicalities of the catalysts and processes used in producing ammonia, hydrogen and methanol via hydrocarbon steam reforming. It also covers the oxidation reactions in making formaldehyde from methanol, nitric acid from ammonia and sulphuric acid from sulphur dioxide. Designed for use in the chemical industry and by those in teaching, research and the study of industrial catalysts and catalytic processes. Students will also find this book extremely useful for obtaining practical information not available in more conventional textbooks.

Mössbauer Spectroscopy of Environmental Materials and Their Industrial Utilization

Author : Enver Murad
Publisher : Springer Science & Business Media
ISBN 13 : 1441990402
Total Pages : 425 pages
Book Rating : 4.4/5 (419 download)

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Book Synopsis Mössbauer Spectroscopy of Environmental Materials and Their Industrial Utilization by : Enver Murad

Download or read book Mössbauer Spectroscopy of Environmental Materials and Their Industrial Utilization written by Enver Murad and published by Springer Science & Business Media. This book was released on 2011-06-28 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mössbauer Spectroscopy of Environmental Materials and their Industrial Utilization provides a description of the properties of materials formed on the earth's surface, their synthetic analogs where applicable, and the products of their modifications in the course of natural processes, such as weathering, or in industrial processing as reflected in their Mössbauer spectra. Particular emphasis is placed on the way in which these processes can be observed and elucidated through the use of Mössbauer spectroscopy. The first chapter covers the basic theory of the Mössbauer effect and Chapters 2 and 3 deal with the nuts and bolts of experimental Mössbauer spectroscopy. The principles of these first three chapters, illustrated with many case studies, are applied to different areas of interest in Chapters 4 through 12. The book is directed to a broad audience ranging from graduate students in environmental sciences or chemical engineering with little or no expertise in Mössbauer spectroscopy to researchers from other disciplines who are familiar with this technique but wish to learn more about possible applications to environmental materials and issues.

Modern Developments In Catalysis

Author : Graham J Hutchings
Publisher : World Scientific
ISBN 13 : 1786341239
Total Pages : 347 pages
Book Rating : 4.7/5 (863 download)

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Book Synopsis Modern Developments In Catalysis by : Graham J Hutchings

Download or read book Modern Developments In Catalysis written by Graham J Hutchings and published by World Scientific. This book was released on 2016-11-14 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: The UK Catalysis Hub is a consortium of universities working together on fundamental and applied research to find out how catalysts work and to improve their effectiveness. The contribution of catalysis to manufacturing contributes to almost 40% of global GDP, making development and innovation within the field integral to industry.Modern Developments in Catalysis provides a review of current research and practise on catalysis, focussing on five main themes: catalysis design, environmental catalysis, catalysis and energy, chemical transformation and biocatalysis and biotransformations. Topics range from complex reactions to the intricacies of catalyst preparation for supported nanoparticles, while chapters illustrate the challenges facing catalytic science and the directions in which the field is developing. Edited by leaders of the UK Hub, this book provides insight into one of the most important areas of modern chemistry — it represents a unique learning opportunity for students and professionals studying and working towards speeding-up, improving and increasing the rate of catalytic reactions in science and industry.

Engineering Solutions for CO2 Conversion

Author : Tomas Ramirez Reina
Publisher : John Wiley & Sons
ISBN 13 : 3527346392
Total Pages : 498 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Engineering Solutions for CO2 Conversion by : Tomas Ramirez Reina

Download or read book Engineering Solutions for CO2 Conversion written by Tomas Ramirez Reina and published by John Wiley & Sons. This book was released on 2021-07-19 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide that offers a review of the current technologies that tackle CO2 emissions The race to reduce CO2 emissions continues to be an urgent global challenge. "Engineering Solutions for CO2 Conversion" offers a thorough guide to the most current technologies designed to mitigate CO2 emissions ranging from CO2 capture to CO2 utilization approaches. With contributions from an international panel representing a wide range of expertise, this book contains a multidisciplinary toolkit that covers the myriad aspects of CO2 conversion strategies. Comprehensive in scope, it explores the chemical, physical, engineering and economical facets of CO2 conversion. "Engineering Solutions for CO2 Conversion" explores a broad range of topics including linking CFD and process simulations, membranes technologies for efficient CO2 capture-conversion, biogas sweetening technologies, plasma-assisted conversion of CO2, and much more. This important resource: * Addresses a pressing concern of global environmental damage, caused by the greenhouse gases emissions from fossil fuels * Contains a review of the most current developments on the various aspects of CO2 capture and utilization strategies * Incldues information on chemical, physical, engineering and economical facets of CO2 capture and utilization * Offers in-depth insight into materials design, processing characterization, and computer modeling with respect to CO2 capture and conversion Written for catalytic chemists, electrochemists, process engineers, chemical engineers, chemists in industry, photochemists, environmental chemists, theoretical chemists, environmental officers, "Engineering Solutions for CO2 Conversion" provides the most current and expert information on the many aspects and challenges of CO2 conversion.

Natural Gas Conversion VI

Author : T.H. Fleisch
Publisher : Elsevier
ISBN 13 : 0080537316
Total Pages : 577 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Natural Gas Conversion VI by : T.H. Fleisch

Download or read book Natural Gas Conversion VI written by T.H. Fleisch and published by Elsevier. This book was released on 2001-06-01 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains peer-reviewed manuscripts describing the scientific and technological advances presented at the 6th Natural Gas Conversion Sumposium held in Alaska in June 2001. This symposium continues the tradition of excellence and the status as the premier technical meeting in this area established by previous meetings.The 6th Natural Gas Conversion Symposium is conducted under the overall direction of the Organizing Committee. The Program Committee was responsible for the review, selection, editing of most of the manuscripts included in this volum. A standing International Advisory Board has ensured the effective long-term planning and the continuity and technical excellence of these meetings.

Conversion of Carbon Dioxide into Hydrocarbons Vol. 1 Catalysis

Author : Inamuddin
Publisher : Springer
ISBN 13 : 9783030286217
Total Pages : 0 pages
Book Rating : 4.2/5 (862 download)

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Book Synopsis Conversion of Carbon Dioxide into Hydrocarbons Vol. 1 Catalysis by : Inamuddin

Download or read book Conversion of Carbon Dioxide into Hydrocarbons Vol. 1 Catalysis written by Inamuddin and published by Springer. This book was released on 2020-01-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the catalytic conversion of carbon dioxide into various hydrocarbons and other products using photochemical, electrochemical and thermo-chemical processes. Products include formate, formic acid, alcohols, lower and higher hydrocarbons, gases such as hydrogen, carbon monoxide and syngas.

Iron and Cobalt Catalysts

Author : Wilson D. Shafer
Publisher : MDPI
ISBN 13 : 303928388X
Total Pages : 414 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Iron and Cobalt Catalysts by : Wilson D. Shafer

Download or read book Iron and Cobalt Catalysts written by Wilson D. Shafer and published by MDPI. This book was released on 2020-06-23 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the turn of the last century when the field of catalysis was born, iron and cobalt have been key players in numerous catalysis processes. These metals, due to their ability to activate CO and CH, haev a major economic impact worldwide. Several industrial processes and synthetic routes use these metals: biomass-to-liquids (BTL), coal-to-liquids (CTL), natural gas-to-liquids (GTL), water-gas-shift, alcohol synthesis, alcohol steam reforming, polymerization processes, cross-coupling reactions, and photocatalyst activated reactions. A vast number of materials are produced from these processes, including oil, lubricants, waxes, diesel and jet fuels, hydrogen (e.g., fuel cell applications), gasoline, rubbers, plastics, alcohols, pharmaceuticals, agrochemicals, feed-stock chemicals, and other alternative materials. However, given the true complexities of the variables involved in these processes, many key mechanistic issues are still not fully defined or understood. This Special Issue of Catalysis will be a collaborative effort to combine current catalysis research on these metals from experimental and theoretical perspectives on both heterogeneous and homogeneous catalysts. We welcome contributions from the catalysis community on catalyst characterization, kinetics, reaction mechanism, reactor development, theoretical modeling, and surface science.

Plasma Catalysis

Author : Annemie Bogaerts
Publisher : MDPI
ISBN 13 : 3038977500
Total Pages : 248 pages
Book Rating : 4.0/5 (389 download)

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Book Synopsis Plasma Catalysis by : Annemie Bogaerts

Download or read book Plasma Catalysis written by Annemie Bogaerts and published by MDPI. This book was released on 2019-04-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, N2 fixation for the synthesis of NH3 or NOx, methane conversion into higher hydrocarbons or oxygenates. It is also widely used for air pollution control (e.g., VOC remediation). Plasma catalysis allows thermodynamically difficult reactions to proceed at ambient pressure and temperature, due to activation of the gas molecules by energetic electrons created in the plasma. However, plasma is very reactive but not selective, and thus a catalyst is needed to improve the selectivity. In spite of the growing interest in plasma catalysis, the underlying mechanisms of the (possible) synergy between plasma and catalyst are not yet fully understood. Indeed, plasma catalysis is quite complicated, as the plasma will affect the catalyst and vice versa. Moreover, due to the reactive plasma environment, the most suitable catalysts will probably be different from thermal catalysts. More research is needed to better understand the plasma–catalyst interactions, in order to further improve the applications.

High Temperature Water Gas Shift Catalysts

Author : S. Benny
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (829 download)

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Book Synopsis High Temperature Water Gas Shift Catalysts by : S. Benny

Download or read book High Temperature Water Gas Shift Catalysts written by S. Benny and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The high-temperature (HT) Water Gas Shift (WGS) reaction has considerable technological relevance for lowering CO content during the conversion of natural gas or liquid hydrocarbons to hydrogen. Conventional HT-WGS catalysts based on oxides of iron and chromium are well established industrially. However, it is crucial to remove any impurities present such as Cr6+, S or N during the catalytic process. In particular, Cr6+ is regarded as a Class I carcinogen and its presence is restricted by EU legislation. Even though Cr6+ is reduced during the catalytic process, caution must still be taken to eliminate any further impurities. Hence, it is desirable to identify alternative promoters and develop a Cr-free HT-WGS catalyst. This thesis presents results obtained using atomistic simulation techniques to investigate the effect of Cr3+ and possible alternative dopants in three important iron oxide materials, Hematite ([alpha]-Fe2O3), Maghemite ([gamma]-Fe2O3) and Magnetite (Fe3O4). The starting point is to develop an understanding of the structural properties and distribution of Cr3+ on the bulk and surface material of hematite. The critical stage of understanding the role of Cr3+ provides the basis from which criteria for novel dopants can be assessed. Al3+ and Mn3+ are proposed as the promising candidates on the basis of this study. The research has been extended to other complex iron oxides, such as maghemite and magnetite. In summary, the role of chromium in the HT-WGS reaction has been investigated to establish criteria for effective, alternative promoter dopants. This investigation has provided a detailed insight into the atomic level behaviour of Cr3+, Mn3+, Al3+ impurities in three major iron oxide phases. The alternative dopants predicted in this study have been the subject of parallel experimental studies conducted by Johnson Matthey. The results of this study are already benefiting the design of more efficient iron-oxide catalysts for the HT-WGS reaction.

Catalysis

Author : James J Spivey
Publisher : Royal Society of Chemistry
ISBN 13 : 1839163127
Total Pages : 494 pages
Book Rating : 4.8/5 (391 download)

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Book Synopsis Catalysis by : James J Spivey

Download or read book Catalysis written by James J Spivey and published by Royal Society of Chemistry. This book was released on 2021-06-14 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume looks at modern approaches to catalysis and reviews the extensive literature. Chapters highlight application of 2D materials in biomass conversion catalysis, plasmonic photocatalysis, catalytic demonstration of mesoporosity in the hierarchical zeolite and the effect of surface phase oxides on supported metals and catalysis. Looking to the future a chapter on ab initio machine learning for accelerating catalytic materials discovery is included. Appealing broadly to researchers in academia and industry, these illustrative chapters bridge the gap from academic studies in the laboratory to practical applications in industry not only for catalysis field but also for environmental protection. Other chapters with an industrial perspective include heterogeneous and homogeneous catalytic routes for vinyl acetate synthesis, catalysis for production of jet fuel from renewable sources by HDO/HDC and microwave-assisted catalysis for fuel conversion. Chemical reactions in ball mills is also explored. The book will be of great benefit to any researcher wanting a succinct reference on developments in this area now and looking to the future.

Fischer-Tropsch Technology

Author : André Steynberg
Publisher : Elsevier
ISBN 13 : 0080472796
Total Pages : 722 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Fischer-Tropsch Technology by : André Steynberg

Download or read book Fischer-Tropsch Technology written by André Steynberg and published by Elsevier. This book was released on 2004-10-30 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fischer-Tropsch Technology is a unique book for its state-of-the-art approach to Fischer Tropsch (FT) technology. This book provides an explanation of the basic principles and terminology that are required to understand the application of FT technology. It also contains comprehensive references to patents and previous publications. As the first publication to focus on theory and application, it is a contemporary reference source for students studying chemistry and chemical engineering. Researchers and engineers active in the development of FT technology will also find this book an invaluable source of information. * Is the first publication to cover the theory and application for modern Fischer Tropsch technology * Contains comprehensive knowledge on all aspects relevant to the application of Fischer Tropsch technology* No other publication looks at past, present and future applications

Metal Oxides in Heterogeneous Catalysis

Author : Jacques C. Vedrine
Publisher : Elsevier
ISBN 13 : 0128116323
Total Pages : 620 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Metal Oxides in Heterogeneous Catalysis by : Jacques C. Vedrine

Download or read book Metal Oxides in Heterogeneous Catalysis written by Jacques C. Vedrine and published by Elsevier. This book was released on 2018-01-11 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. - Presents case studies in each chapter that provide a focus on the industrial applications - Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource - Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications

Surface Chemistry and Catalysis

Author : Michalis Konsolakis
Publisher : MDPI
ISBN 13 : 303842286X
Total Pages : 301 pages
Book Rating : 4.0/5 (384 download)

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Book Synopsis Surface Chemistry and Catalysis by : Michalis Konsolakis

Download or read book Surface Chemistry and Catalysis written by Michalis Konsolakis and published by MDPI. This book was released on 2018-09-27 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Surface Chemistry and Catalysis" that was published in Catalysts

Heterogeneous Gold Catalysts and Catalysis

Author : Zhen Ma
Publisher : Royal Society of Chemistry
ISBN 13 : 184973917X
Total Pages : 288 pages
Book Rating : 4.8/5 (497 download)

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Book Synopsis Heterogeneous Gold Catalysts and Catalysis by : Zhen Ma

Download or read book Heterogeneous Gold Catalysts and Catalysis written by Zhen Ma and published by Royal Society of Chemistry. This book was released on 2014-09-10 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once considered an inert element, gold has recently gained attention as a catalyst. With hundreds of papers being published each year, this book presents a comprehensive review of this rapidly-evolving field, with contributions by leading experts across the globe. Going through the chapters citing the primary literature, the reader will gain a thorough background to the use of gold in catalysis, as well as the latest methods for the preparation of gold catalysts. Other chapters demonstrate the characterisation and modelling of gold-catalysed reactions, with consideration given to both the fundamentals and commercial applications of this emerging group of catalysts.Written to be accessible by postgraduates and newcomers to the field, this book will also benefit experienced researchers and therefore be an essential reference in the laboratory.