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Author : Gurdeep Singh Ranhotra
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.:/5 (29 download)
Download or read book Studies of Molybdenum Carbide Catalysts written by Gurdeep Singh Ranhotra and published by . This book was released on 1986 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Kraft Neylon
Publisher :
ISBN 13 : 9780599634268
Total Pages : pages
Book Rating : 4.6/5 (342 download)
Download or read book Synthesis, Characterization, and Activity of Molybdenum Carbide Catalysts written by Michael Kraft Neylon and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karthick Murugappan
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (1 download)
Download or read book Molybdenum Trioxide and Molybdenum Carbide as Promising Hydrodeoxygenation Catalysts for Biomass Conversion written by Karthick Murugappan and published by . This book was released on 2017 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growing concerns due to rising CO2 emissions have made biomass an indispensable source of renewable fuels and chemicals. However, biomass inherently has high oxygen content, which translates to low energy density, thereby necessitating a deoxygenation step before being utilized as fuels. Recently, MoO3 and Mo2C have emerged as promising earth-abundant cheap catalysts that perform hydrodeoxygenation (HDO) at relatively low temperatures ( 673 K) and ambient H2 pressures wherein oxygen is selectively removed as water. However, there exists a significant knowledge gap in understanding the stability and the active phases responsible for HDO of these catalysts. Furthermore, their applicability for real biomass conversions has not been largely demonstrated. In this thesis, first, HDO of m-cresol, a biomass-derived model compound, is investigated over bulk and supported MoO 3 catalysts. Detailed reactivity and characterization studies reveal that Mo5+ species plays a critical role during HDO. Specifically, TiO2 and ZrO2 are identified as ideal supports as they feature superior HDO reactivity and stability over bulk MoO3 by stabilizing intermediate Mo oxidation states (i.e. Mo5+) while bulk MoO 3 over-reduces to inactive metallic Mo. Translating from model compound studies, supported MoO3 catalysts are demonstrated to be effective in converting biomass (pine) pyrolysis vapors to hydrocarbons (ca. 30 % yield). In comparison with MoO 3, Mo2C is significantly more stable and selective for HDO of 4-methylanisole to toluene under identical reaction conditions. Mo2C predominantly breaks the stronger phenolic C-0 bond while MoO 3 also breaks the weaker aliphatic C-0 bond, likely due to the presence of Bronsted acid sites. To gain insights into the surface active sites, operando near-ambient XPS is employed during HDO and this technique revealed that HDO seems to operate via distinct active sites over both these materials. Finally, Mo2C is shown to be effective in upgrading real lignin streams to a single product propylbenzene, a precursor for renewable polymer. Overall, this thesis demonstrates the applicability of MoO3 and Mo2C in real biomass conversions and provides insights on the working nature of these catalysts, which will enable the design of more effective HDO catalysts.
Author : Ge, Hui
Publisher : IGI Global
ISBN 13 : 1522522751
Total Pages : 174 pages
Book Rating : 4.5/5 (225 download)
Download or read book Innovative Applications of Mo(W)-Based Catalysts in the Petroleum and Chemical Industry: Emerging Research and Opportunities written by Ge, Hui and published by IGI Global. This book was released on 2017-02-08 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mo(W)-Based Catalysts have the capacity to drastically impact many different industries. Research on their most current applications is important for the success of many organizations and companies, specifically the chemical and petroleum industries. Innovative Applications of Mo(W)-Based Catalysts in the Petroleum and Chemical Industry: Emerging Research and Opportunities is an informative resource that overviews emerging methods and techniques that incorporate 2D layer Mo(W) dichalcogenides. Featuring extensive coverage on a range of subjects including 2D nanosheets, hybridization, dichacogenides, and oxide based catalysts, this is an ideal publication for academicians, students, engineers, and researchers seeking insight on the latest advancements in Mo(W)-Based catalyst applications.
Author : David Charles Lamont
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (548 download)
Download or read book Stability and Activity of Molybdenum Carbide Catalysts for the Oxidative Reforming of Methane written by David Charles Lamont and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jae Sung Lee
Publisher :
ISBN 13 :
Total Pages : 520 pages
Book Rating : 4.F/5 ( download)
Download or read book Molybdenum Carbide Catalysts written by Jae Sung Lee and published by . This book was released on 1984 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Justin S J Hargreaves
Publisher : Royal Society of Chemistry
ISBN 13 : 1788014839
Total Pages : 204 pages
Book Rating : 4.7/5 (88 download)
Download or read book Alternative Catalytic Materials written by Justin S J Hargreaves and published by Royal Society of Chemistry. This book was released on 2018-07-11 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many important industrial chemical processes rely heavily on catalysis and so researchers are always on the lookout for alternative catalytic materials that may improve existing processes or lead to new ones. Families of alternative catalytic materials currently being investigated include the carbides, nitrides and phosphides as well as amorphous boron catalysts. The addition of carbon, nitrogen or phosphorous to transition metals and the creation of boron-transition metal alloys leads to catalytic materials that have interesting properties, with applications in a range of different reactions, including electrocatalysis. This book provides a comprehensive account of the preparation, characterisation and application of these catalytic materials. It is an important reference for researchers and industrialists working in heterogeneous catalysis and materials chemistry.
Author : D. D. Eley
Publisher :
ISBN 13 : 9780120078271
Total Pages : 399 pages
Book Rating : 4.0/5 (782 download)
Download or read book Advances in Catalysis written by D. D. Eley and published by . This book was released on 1978 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin D. Schlesinger
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.0/5 ( download)
Download or read book Relative Activity of Impregnated and Mixed Molybdenum Catalysts for Coal Hydrogenation written by Martin D. Schlesinger and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental data for coal hydrogenation are presented to show that when a vehicle oil produced from coal is present, coal is hydrogenated to the same conversion whether molybdenum catalyst is impregnated on the coal or intimately mixed with the slurry. Differences in product distribution could be related to the severity of operating conditions. No minimum mixing time was established, but 2 hours was sufficient. Longer periods of mixing, to 14.75 hours, had no effect on the results. The hydrogenation conditions were in the pressure range of 8,500 to 10,000 p.s.i. at 400° to 500° C. Most of the experiments were made in duplicate.
Author : R. Maggi
Publisher : Elsevier
ISBN 13 : 0080539459
Total Pages : 1007 pages
Book Rating : 4.0/5 (85 download)
Download or read book Preparation of Catalysts VII written by R. Maggi and published by Elsevier. This book was released on 1998-08-17 with total page 1007 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the VIIth International Symposium on the Scientific Bases for the Preparation of Heterogeneous Catalysts, are in line with the general scope of this series of events. Emphasis in all Symposia has been on the scientific aspects of the preparation of new and industrial catalysts, or on new methods of preparation, rather than on the catalytic reactions in which such solids are ultimately used. In the present context, the catalytic event itself has only been considered as another, though often decisive, method of catalyst characterization.
Author : Gregory Martin Dolce
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Structure and Function of Supported Molybdenum Nitride and Molybdenum Carbide Hydrotreating Catalysts written by Gregory Martin Dolce and published by . This book was released on 1997 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anna Rini Sekar Darujati
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (52 download)
Download or read book The Effect of Reforming Gases on the Stability of Molybdenum Carbide Catalysts written by Anna Rini Sekar Darujati and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oxidation stability of a low surface area Mo2C catalyst has been studied in the presence of gases associated with the steam and dry (CO2) reforming of methane, at temperatures up to 850°C and pressures to 8 bar. The oxidation onset temperatures were found to be about 600°C when the carbide was exposed to either steam or CO2. There appears to be two distinct mechanisms for Mo2C oxidation: direct oxidation at low temperatures and thermal decomposition followed by oxidation of the Mo metal at temperatures above 750°C. Although onset temperatures were similar, CO2 was a stronger oxidant than steam at the higher temperatures. Both H2 and CO were found to inhibit oxidation and the effect can be explained by their influence on the prevailing kinetics. Trace concentrations of methane were found to completely stabilize the carbide from steam oxidation but significantly higher concentrations were required to stabilize it from CO2 oxidation and this is attributed to the higher rates of CO2 oxidation relative to carburization rates. The effect of pressure on the onset temperature of CO2 oxidation of the carbide was found to be negligible, even when inhibited by CO.
Author : Dushyant Shekhawat
Publisher : Elsevier
ISBN 13 : 0444535640
Total Pages : 569 pages
Book Rating : 4.4/5 (445 download)
Download or read book Fuel Cells: Technologies for Fuel Processing written by Dushyant Shekhawat and published by Elsevier. This book was released on 2011-03-18 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel Cells: Technologies for Fuel Processing provides an overview of the most important aspects of fuel reforming to the generally interested reader, researcher, technologist, teacher, student, or engineer. The topics covered include all aspects of fuel reforming: fundamental chemistry, different modes of reforming, catalysts, catalyst deactivation, fuel desulfurization, reaction engineering, novel reforming concepts, thermodynamics, heat and mass transfer issues, system design, and recent research and development. While no attempt is made to describe the fuel cell itself, there is sufficient description of the fuel cell to show how it affects the fuel reformer. By focusing on the fundamentals, this book aims to be a source of information now and in the future. By avoiding time-sensitive information/analysis (e.g., economics) it serves as a single source of information for scientists and engineers in fuel processing technology. The material is presented in such a way that this book will serve as a reference for graduate level courses, fuel cell developers, and fuel cell researchers. Chapters written by experts in each area Extensive bibliography supporting each chapter Detailed index Up-to-date diagrams and full colour illustrations
Author : Michele Aresta
Publisher : John Wiley & Sons
ISBN 13 : 9783527629923
Total Pages : 414 pages
Book Rating : 4.6/5 (299 download)
Download or read book Carbon Dioxide as Chemical Feedstock written by Michele Aresta and published by John Wiley & Sons. This book was released on 2010-01-26 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the need for an up-to-date handbook, this ready reference closely investigates the use of CO2 for ureas, enzymes, carbamates, and isocyanates, as well as its use as a solvent, in electrochemistry, biomass utilization and much more. Edited by an internationally renowned and experienced researcher, this is a comprehensive source for every synthetic chemist in academia and industry.
Author : Mark Crocker
Publisher : John Wiley & Sons
ISBN 13 : 3527344667
Total Pages : 634 pages
Book Rating : 4.5/5 (273 download)
Download or read book Chemical Catalysts for Biomass Upgrading written by Mark Crocker and published by John Wiley & Sons. This book was released on 2020-03-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference to the use of innovative catalysts and processes to turn biomass into value-added chemicals Chemical Catalysts for Biomass Upgrading offers detailed descriptions of catalysts and catalytic processes employed in the synthesis of chemicals and fuels from the most abundant and important biomass types. The contributors?noted experts on the topic?focus on the application of catalysts to the pyrolysis of whole biomass and to the upgrading of bio-oils. The authors discuss catalytic approaches to the processing of biomass-derived oxygenates, as exemplified by sugars, via reactions such as reforming, hydrogenation, oxidation, and condensation reactions. Additionally, the book provides an overview of catalysts for lignin valorization via oxidative and reductive methods and considers the conversion of fats and oils to fuels and terminal olefins by means of esterification/transesterification, hydrodeoxygenation, and decarboxylation/decarbonylation processes. The authors also provide an overview of conversion processes based on terpenes and chitin, two emerging feedstocks with a rich chemistry, and summarize some of the emerging trends in the field. This important book: -Provides a comprehensive review of innovative catalysts, catalytic processes, and catalyst design -Offers a guide to one of the most promising ways to find useful alternatives for fossil fuel resources -Includes information on the most abundant and important types of biomass feedstocks -Examines fields such as catalytic cracking, pyrolysis, depolymerization, and many more Written for catalytic chemists, process engineers, environmental chemists, bioengineers, organic chemists, and polymer chemists, Chemical Catalysts for Biomass Upgrading presents deep insights on the most important aspects of biomass upgrading and their various types.
Author : Louis Toth
Publisher : Elsevier
ISBN 13 : 032315722X
Total Pages : 296 pages
Book Rating : 4.3/5 (231 download)
Download or read book Transition Metal Carbides and Nitrides written by Louis Toth and published by Elsevier. This book was released on 2014-04-11 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Refractory Materials, Volume 7: Transition Metal Carbides and Nitrides discusses the developments in transition metal carbide and nitride research. This volume is organized into nine chapters that emphasize the mechanical and superconducting properties of these compounds. The introductory chapters deal with the general properties, preparation techniques, characterization, crystal chemistry, phase relationships, and thermodynamics of transition metal carbides and nitrides. The following chapter highlights the mechanical properties of these compounds, such as elastic and plastic deformation, fracture, strengthening mechanisms, and hardness. The discussion then shifts to specific electrical and magnetic properties, including electrical resistivity, Hall coefficient, and magnetic susceptibility. A separate chapter is devoted to carbides and nitrides as superconductors. The concluding chapters explore certain theories that explain the mechanisms of band structure and bonding in carbides and nitrides. This volume is of great value to research workers in metallurgy, ceramics, physics, chemistry, and related fields, as well as to advanced students investigating problems concerning high temperature materials or interstitial compounds.
Author : Tomas Ramirez Reina
Publisher : John Wiley & Sons
ISBN 13 : 3527346392
Total Pages : 498 pages
Book Rating : 4.5/5 (273 download)
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.
