Recent Advances In Cobalt And Related Catalysts

Author : John Vakros
Publisher : Unknown
Page : 117 pages
File Size : 55,6 Mb
Release : 2021
Category : Electronic
ISBN : 303651421X

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Recent Advances in Cobalt and Related Catalysts by John Vakros Pdf

Currently, cobalt and related catalysts are very attractive as they provide many advantages, such as low cost and high activity, in a variety of applications. Cobalt catalysts are among the most active catalysts for Fischer-Tropsch synthesis and they promote the catalytic activity of the hydrodesulfurization catalysts. They also found other significant applications in environmental protection such as oxidation of volatile organic compounds, VOC, persulfate activator, ammonia synthesis, electrocatalysis and many more. Cobalt catalysts are active, stable and exhibit significant oxidation-reduction activity, as the Co can be found either as Co(II) or Co(III). Additionally, many molecules can interact with the cobalt supported phase by co-ordination due to partially filled d-orbital. Co-catalysts can be supported in almost all the inorganic supports such as alumina, titania, zeolites, etc. The cobalt oxide phase can be stabilized on the surface of the support due to variable interactions between the support and cobalt phase. These interactions are crucial for catalytic activity and can be regulated by proper selection of the preparation parameters such as the type of support, the Co loading, impregnation method and thermal conditions.This Special Issue aims to cover recent progress and advances in the field of cobalt and related catalysts.

Author : John Vakros
Publisher : Mdpi AG
Page : 118 pages
File Size : 43,5 Mb
Release : 2021-09-08
Category : Science
ISBN : 3036514228

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Recent Advances in Cobalt and Related Catalysts by John Vakros Pdf

Currently, cobalt and related catalysts are very attractive as they provide many advantages, such as low cost and high activity, in a variety of applications. Cobalt catalysts are among the most active catalysts for Fischer-Tropsch synthesis and they promote the catalytic activity of the hydrodesulfurization catalysts. They also found other significant applications in environmental protection such as oxidation of volatile organic compounds, VOC, persulfate activator, ammonia synthesis, electrocatalysis and many more. Cobalt catalysts are active, stable and exhibit significant oxidation-reduction activity, as the Co can be found either as Co(II) or Co(III). Additionally, many molecules can interact with the cobalt supported phase by co-ordination due to partially filled d-orbital. Co-catalysts can be supported in almost all the inorganic supports such as alumina, titania, zeolites, etc. The cobalt oxide phase can be stabilized on the surface of the support due to variable interactions between the support and cobalt phase. These interactions are crucial for catalytic activity and can be regulated by proper selection of the preparation parameters such as the type of support, the Co loading, impregnation method and thermal conditions.

Author : Wilson D. Shafer,Gary Jacobs
Publisher : MDPI
Page : 414 pages
File Size : 40,9 Mb
Release : 2020-06-23
Category : Science
ISBN : 9783039283880

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Iron and Cobalt Catalysts by Wilson D. Shafer,Gary Jacobs Pdf

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.

Author : Marko Hapke,Gerhard Hilt
Publisher : John Wiley & Sons
Page : 480 pages
File Size : 53,8 Mb
Release : 2020-04-06
Category : Technology & Engineering
ISBN : 9783527344505

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Cobalt Catalysis in Organic Synthesis by Marko Hapke,Gerhard Hilt Pdf

Provides a much-needed account of the formidable "cobalt rush" in organic synthesis and catalysis Over the past few decades, cobalt has turned into one of the most promising metals for use in catalytic reactions, with important applications in the efficient and selective synthesis of natural products, pharmaceuticals, and new materials. Cobalt Catalysis in Organic Synthesis: Methods and Reactions provides a unique overview of cobalt-catalysed and -mediated reactions applied in modern organic synthesis. It covers a broad range of homogeneous reactions, like cobalt-catalysed hydrogenation, hydrofunctionalization, cycloaddition reactions, C-H functionalization, as well as radical and biomimetic reactions. First comprehensive book on this rapidly evolving research area Covers a broad range of homogeneous reactions, such as C-H activation, cross-coupling, synthesis of heterocyclic compounds (Pauson-Khand), and more Chapters on low-valent cobalt complexes as catalysts in coupling reactions, and enantioselective cobalt-catalyzed transformations are also included Can be used as a supplementary reader in courses of advanced organic synthesis and organometallic chemistry Cobalt Catalysis in Organic Synthesis is an ideal book for graduates and researchers in academia and industry working in the field of synthetic organic chemistry, catalysis, organometallic chemistry, and natural product synthesis.

Author : Naohiko Yoshikai
Publisher : Georg Thieme Verlag
Page : 876 pages
File Size : 40,7 Mb
Release : 2023-09-06
Category : Science
ISBN : 9783132455047

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Base-Metal Catalysis 2 by Naohiko Yoshikai Pdf

Recent advances in catalytic methods based on earth-abundant metals are discussed. Catalysis with earth-abundant metals, often referred to as base metals, is having a transformative impact on synthetic chemistry. Research in this area is driven not only by the common interest in the sustainability of chemical synthesis but also by the vast opportunity to discover and develop novel reaction chemistry that is not attainable with rare and precious metal catalysts. This work provides representative developments in base-metal catalysis, specifically catalysis with 3d-transition metals, in a format suitable for practitioners of organic synthesis. Volume 2 is focused on recent advances in catalysis involving cobalt, iron, manganese, and chromium. Topics covered include various types of cross-coupling processes, hydrofunctionalization of alkenes and alkynes, C-H functionalizations, and catalytic Nozaki–Hiyama–Kishi-type reactions.

Author : Anonim
Publisher : Academic Press
Page : 320 pages
File Size : 54,6 Mb
Release : 1948-01-01
Category : Technology & Engineering
ISBN : 0080565050

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Advances in Catalysis by Anonim Pdf

Advances in Catalysis

Author : Mauro Graziani,C N R Rao
Publisher : World Scientific
Page : 374 pages
File Size : 50,6 Mb
Release : 1991-05-17
Category : Science
ISBN : 9789814556330

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Advances In Catalyst Design - Proceedings Of The Workshop by Mauro Graziani,C N R Rao Pdf

This proceedings volume offer a review on Catalyst Design including recent advances and theories. It also includes assessments of the development of long-term research activities in catalysis at ICS. Topics covered include catalytic materials, organometallic chemistry, supports and support interactions and spectroscopic methods, and are presented by top-level international specialists such as J Brown (Oxford); W Keim (Aachen); R Prins (Zurich); C N R Rao (Bangalore); P Ratnasamy (Pune); R Sanchez-Delgado (Caracas); and R Ugo (Milan).

Author : B. Viswanathan,C. N. Pillai
Publisher : Editions TECHNIP
Page : 820 pages
File Size : 42,6 Mb
Release : 1991
Category : Science
ISBN : 2710806266

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Recent Developments in Catalysis by B. Viswanathan,C. N. Pillai Pdf

Author : Wilson D Shafer,Gary Jacobs
Publisher : Unknown
Page : 414 pages
File Size : 40,8 Mb
Release : 2020
Category : Electronic
ISBN : 3039283898

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Iron and Cobalt Catalysts by Wilson D Shafer,Gary Jacobs Pdf

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.

Author : L. Guczi
Publisher : Elsevier
Page : 489 pages
File Size : 46,9 Mb
Release : 1991-06-25
Category : Technology & Engineering
ISBN : 0080887155

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New Trends in CO Activation by L. Guczi Pdf

The aim of this volume is to provide scientists with a comprehensive summary of new research areas in the activation of carbon monoxide, as one of the most reactive molecules, and in its applications. In order to understand the variety of the reactivity of CO, a quantum-chemical approach helps the reader to understand the binding state of CO to the solid surface (Chapter 1). The structure of the adsorbed CO can be better understood by examining its reactivity towards single crystals in the absence and in the presence of promoters (Chapter 2). The first approach in the reactivity study is that of studying catalytic activity of single crystals and structure sensitivity which are summarized in Chapter 3. One of the most prominent effects in the CO activation process is ascribed to the presence of additives, promoters which, in a real catalyst system, are far more complicated than on single crystal surfaces (Chapter 4). The original Fischer-Tropsch process applied fused iron or cobalt catalysts which were suitable for producing mainly straight chain hydrocarbons. The two most important processes involving CO activation, the new FT process and alcohol formation are discussed in Chapters 5 and 7. An important type of catalyst, the bimetallic catalysts, is discussed in Chapter 6. The role of hydrogen as one of the most frequently used partners in CO activation is discussed in Chapter 8. The field of production of specialty chemicals is an excellent example of the homogeneous catalytic activation of CO (Chapter 9). In Chapter 10 an overview is given of the industrial applications of CO chemistry and these are illustrated by working processes. The final chapter gives the reader some hints about future progress in the field.

Author : Hui Yang,Yongjun Feng, Nicolas Alonso-Vante
Publisher : MDPI
Page : 190 pages
File Size : 42,5 Mb
Release : 2019-11-01
Category : Science
ISBN : 9783039215409

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Novel Non-Precious Metal Electrocatalysts for Oxygen Electrode Reactions by Hui Yang,Yongjun Feng, Nicolas Alonso-Vante Pdf

Research on alternative energy harvesting technologies, conversion and storage systems with high efficiency, cost-effective and environmentally friendly systems, such as fuel cells, rechargeable metal-air batteries, unitized regenerative cells, and water electrolyzers has been stimulated by the global demand on energy. The conversion between oxygen and water plays a key step in the development of oxygen electrodes: oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), processes activated mostly by precious metals, like platinum. Their scarcity, their prohibitive cost, and declining activity greatly hamper large-scale applications. This issue reports on novel non-precious metal electrocatalysts based on the innovative design in chemical compositions, structure, and morphology, and supports for the oxygen reaction.

Author : Jianbo Wang,Chi-Ming Che,Michael P. Doyle
Publisher : John Wiley & Sons
Page : 450 pages
File Size : 44,5 Mb
Release : 2022-05-16
Category : Science
ISBN : 9783527347995

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Transition Metal-Catalyzed Carbene Transformations by Jianbo Wang,Chi-Ming Che,Michael P. Doyle Pdf

Presents an up-to-date overview of the rapidly growing field of carbene transformations Carbene transformations have had an enormous impact on catalysis and organometallic chemistry. With the growth of transition metal-catalyzed carbene transformations in recent decades, carbene transformations are today an important compound class in organic synthesis as well as in the pharmaceutical and agrochemical industries. Edited by leading experts in the field, Transition Metal-Catalyzed Carbene Transformations is a thorough summary of the most recent advances in the rapidly expanding research area. This authoritative volume covers different reaction types such as ring forming reactions and rearrangement reactions, details their conditions and properties, and provides readers with accurate information on a wide range of carbene reactions. Twelve in-depth chapters address topics including carbene C-H bond insertion in alkane functionalization, the application of engineered enzymes in asymmetric carbene transfer, progress in transition-metal-catalyzed cross-coupling using carbene precursors, and more. Throughout the text, the authors highlight novel catalytic systems, transformations, and applications of transition-metal-catalyzed carbene transfer. Highlights the dynamic nature of the field of transition-metal-catalyzed carbene transformations Summarizes the catalytic radical approach for selective carbene cyclopropanation, high enantioselectivity in X-H insertions, and bio-inspired carbene transformations Introduces chiral N,N'-dioxide and chiral guanidine-based catalysts and different transformations with gold catalysis Discusses approaches in cycloaddition reactions with metal carbenes and polymerization with carbene transformations Outlines multicomponent reactions through gem-difunctionalization and transition-metal-catalyzed cross-coupling using carbene precursors Transition Metal-Catalyzed Carbene Transformations is essential reading for all chemists involved in organometallics, including organic and inorganic chemists, catalytic chemists, and chemists working in industry.

Author : C. Claeys
Publisher : Elsevier
Page : 1003 pages
File Size : 40,6 Mb
Release : 2004
Category : Catalysis
ISBN : 9780444518255

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Recent Advances in the Science and Technology of Zeolites and Related Materials by C. Claeys Pdf

Recent Advances in Science and Technology of Zeolites and Related Materials is a collection of oral and poster communications, presented during the 14th International Zeolite Conference (IZC). The conference was hosted by the Catalysis Society of South Africa. In the tradition of the IZC series, this Conference provides a forum for the presentation of new knowledge in the science and technology of zeolites and related materials. Papers presented cover a wide range of topics that include synthesis, structure determination, characterisation, modelling, and catalysis. This highly visual book is a must for readers looking to stay up-to-date on zeolite science. * This three-part volume provides valuable information on zeolites and related materials * Includes papers that cover topics such as structure determination, modelling and separation processes * Contains new and exciting developments in the field

Author : Burtron H. Davis,Mario L. Occelli
Publisher : CRC Press
Page : 424 pages
File Size : 43,8 Mb
Release : 2016-04-06
Category : Science
ISBN : 9781466555303

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Fischer-Tropsch Synthesis, Catalysts, and Catalysis by Burtron H. Davis,Mario L. Occelli Pdf

With petroleum prices spiraling upward, making synthetic fuels-or "synfuels"-from coal, natural gas, and biomass has become more economically competitive. Advanced energy companies now focus exclusively on alternative fuels, and many oil companies have programs dedicated to developing synthetic fuels. The Fischer-Tropsch process, which uses a colle

Author : B. H. Davis,Mario L. Occelli
Publisher : CRC Press
Page : 424 pages
File Size : 52,6 Mb
Release : 2009-11-10
Category : Science
ISBN : 1420062573

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Advances in Fischer-Tropsch Synthesis, Catalysts, and Catalysis by B. H. Davis,Mario L. Occelli Pdf

Rising oil costs have stimulated significant interest in the Fischer-Tropsch synthesis (FTS) as a method for producing a synthetic petroleum substitute. Drawn from the proceedings at a symposium held during the 236th meeting of the American Chemical Society in Philadelphia in August 2008, Advances in Fischer-Tropsch Synthesis, Catalysts, and Catalysis explores the recent developments in Fischer-Tropsch technology, which holds great promise in the area of renewable resources. Expert contributors explore a range of issues The book focuses on three main themes: catalyst preparation and activation, reaction mechanism, and process-related topics. A panel of expert contributors discusses synthesis of catalysts, carbon nanomaterials, nitric oxide calcinations, the influence of carbon, catalytic performance issues, chelating agents, and Cu and alkali promoters. They also explore Co/silica catalysts, thermodynamic control, the Two Alpha model, co-feeding experiments, internal diffusion limitations, Fe-LTFT selectivity, and the effect of co-fed water. Lastly, the book examines cross-flow filtration, kinetic studies, reduction of CO2 emissions, syncrude, and low-temperature water-gas shift. Attaining the maximum catalytic activity and catalyst life The themes explored in the book demonstrate that while the Fischer-Tropsch synthesis (FTS) has advanced in maturity, many issues remain concerning the preparation of increasingly active catalysts and the method of activation to attain the maximum catalytic activity and catalyst life. The book includes coverage of the structural features, their changes, and the application of increasingly sophisticated characterization techniques, shedding light on the reaction mechanism and providing a glimpse into the processes and reaction rates under realistic commercial process conditions.