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An Infrared Study Of The Dissociation Of Carbon Dioxide Over Supported Rhodium Catalysts
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Book Synopsis An Infrared Study of the Dissociation of Carbon Dioxide Over Supported Rhodium Catalysts by : M. A. Henderson
Download or read book An Infrared Study of the Dissociation of Carbon Dioxide Over Supported Rhodium Catalysts written by M. A. Henderson and published by . This book was released on 1985 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: An infrared study has been performed concerning the possible dissociation of CO2 on supported Rh catalyst films. The data indicate that CO2 does dissociate on Rh/TiO2 and Rh/Al2O3 to form a carbonyl hydride species in accord with the work of Solymosi. This dissociation process is considerably enhanced by the presence of a small amount of hydrogen gas, but will proceed in the absence of hydrogen gas with the assistance of hydrogen migration from the support. Impurity boron also enhances the formation of the carbonyl hydride species, and hence CO2 dissociation, when it is present in the supported Rh films. Author finished keywords: Infrared spectroscopy, Carbon dioxide, Methanation, Supported rhodium catalysts.
Book Synopsis An Infrared Study of the Hydrogenation of Carbon Dioxide on Supported Rhodium Catalysts by : M. A. Henderson
Download or read book An Infrared Study of the Hydrogenation of Carbon Dioxide on Supported Rhodium Catalysts written by M. A. Henderson and published by . This book was released on 1985 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: An infrared study of the methanation of CO2 on supported Rh catalysts has been performed. This reaction has been shown to occur over these catalysts with higher turnover frequency at a given temperature and Rh loading than does the methanation of CO. A support effect has been demonstrated for the reaction over the supported Rh catalysts (TiO2 Al2O3 SiO2 in reactivity). A key surface intermediate during the methanation reaction is a carbonyl hydride species, as evidenced by a prominent infrared band in the 2020-2040/cm region which shifts by 5-10/cm when D2 is substituted for H2 in the reaction mixture. This carbonyl hydride species can be produced in the absence of H2 by migration of H from the support to Rh. The dissociation of CO2 on supported Rh has been shown to be enhanced by the presence of H2 and impurity boron. Originator-supplied keywords include: Infrared spectroscopy, Carbon dioxide, Hydrogenation, Methanation, and Supported rhodium catalysts.
Book Synopsis An Infrared Study of Isotopic Exchange During Methanation Over Supported Rhodium Catalysts; An Inverse Spillover Effect by : M. A. Henderson
Download or read book An Infrared Study of Isotopic Exchange During Methanation Over Supported Rhodium Catalysts; An Inverse Spillover Effect written by M. A. Henderson and published by . This book was released on 1985 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared spectroscopy has been employed to study the reduction of carbon dioxide on supported catalyst films. The investigation included isotopic labeling using deuterium as the reduction gas. Isotopic exchange was observed for both carbon dioxide/D2 and methane/deuterium mixtures. The mechanism of this isotopic exchange involves migration of hydrogen from the support to the rhodium sites, an inverse spillover effect. A key intermediate in the dissociation of carbon dioxide on the supported Rh films was a carbonyl hydride species.
Book Synopsis An Infrared Study of the Oxidation of Carbon Monoxide Over Supported Rhodium Catalysts by : C. H. Dai
Download or read book An Infrared Study of the Oxidation of Carbon Monoxide Over Supported Rhodium Catalysts written by C. H. Dai and published by . This book was released on 1985 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reaction of carbon monoxide and oxygen over supported rhodium films has been studied using infrared spectroscopy. The focus of work was the reactivity of the various CO/Rh/X (X=Al2O3, SiO2, TiO2) surface states for supported catalysts having high and low Rh loading. Under the reaction conditions the 'linear CO' species was the most stable toward oxidation, but this could have been a result of an oxidized Rh surface. A new CO/Rh surface species has been proposed which exhibits an infrared band at 2000/cm for a 0.5% Rh/TiO2 film. This species is believed to be a bridged carbonyl between Rh+1 and the TiO2 support. Originator-supplied keywords include: Infrared spectroscopy, and Carbon dioxide.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Infrared Study of Supported Rhodium Catalysts by : Chi-Hun Dai
Download or read book An Infrared Study of Supported Rhodium Catalysts written by Chi-Hun Dai and published by . This book was released on 1987 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties and Applications of Perovskite-Type Oxides by : L.G. Tejuca
Download or read book Properties and Applications of Perovskite-Type Oxides written by L.G. Tejuca and published by CRC Press. This book was released on 2000-10-17 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference offers an overview of the bulk and surface properties of perovskite-like structures, and provides the latest discussions on the applications of these materials and processes. It also introduces ceramic methods for the processing of perovskite-derived high Tc cuprates.;Examining every available procedure for synthesizing high-surface-area perovskite oxides, this book: delineates processing techniques for preparing perovskite-derived high-critical-temperature superconductors; illustrates the relevance of physiochemical methods to investigate bulk and surface structures of perovskite compounds; explicates the importance of surface composition in the context of catalytic behaviour; summarizes methods of changing stoichiometry; shows how to design perovskite oxides for a given purpose; reviews key solid-state properties; and presents the major applications.
Book Synopsis Infrared Study of the Surface Interaction Between H2 and CO2 Over Rhodium on Various Supports by :
Download or read book Infrared Study of the Surface Interaction Between H2 and CO2 Over Rhodium on Various Supports written by and published by . This book was released on 1981 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Infrared Studies of Supported Rhodium Catalysts by : James A. Anderson
Download or read book Infrared Studies of Supported Rhodium Catalysts written by James A. Anderson and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Infrared Studies of Supported Rhodium Catalysts by : E. A. Hyde
Download or read book Infrared Studies of Supported Rhodium Catalysts written by E. A. Hyde and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oxygenated Products from Carbon Monoxide Hydrogenation Over Supported Rhodium and Iridium Catalysts by : Berend Jan Kip
Download or read book Oxygenated Products from Carbon Monoxide Hydrogenation Over Supported Rhodium and Iridium Catalysts written by Berend Jan Kip and published by . This book was released on 1987 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1983 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Small-Scale Gas to Liquid Fuel Synthesis by : Nick Kanellopoulos
Download or read book Small-Scale Gas to Liquid Fuel Synthesis written by Nick Kanellopoulos and published by CRC Press. This book was released on 2015-02-23 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that a large fraction of natural gas reserves are found in locations from where transport is not economical. If these isolated natural gas reserves could be converted to synthetic fuels, they would generate around 250 billion barrels of synthetic oil-a quantity equal to one-third of the Middle East's proven oil reserves. Small-Scale
Book Synopsis Molecular Spectroscopy of Oxide Catalyst Surfaces by : Anatoli Davydov
Download or read book Molecular Spectroscopy of Oxide Catalyst Surfaces written by Anatoli Davydov and published by John Wiley & Sons. This book was released on 2003-06-27 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: As in the study of transition metal complexes in solution, molecular spectroscopic methods - principally the infrared, ultraviolet/visible and electron spin resonance spectroscopies - have played key roles in establishing the concepts of coordination chemistry occurring at the surfaces of solids. This book describes the development of the principals of coordination chemistry of oxide surfaces using analyses of data obtained by these methods. The nature, properties, concentration of the surface adsorption centers and their influence on the character of interaction with different molecules are investigated. The book commences with an account of the basic theoretical principles and experimental techniques of the various spectroscopy methods, with special attention devoted to in situ measurements where the oxide or catalyst sample is in contact with the adsorbate or the reactant. A detailed account is presented of the methods for characterizing the oxidation state and degree of coordination of surface cations and oxygen anions by the adsorption of probe molecules. The complexation of many inorganic, organometallic and organic molecules with different oxide systems is critically examined, and a classification of formed surface compounds, based on the interaction with definite type of adsorption centers, is given. Possible mechanisms of numerous catalytic reactions, including the transformation of organic molecules over acidic catalysts via the carboionic mechanism, are discussed using the spectroscopic identifications of reaction intermediates. A comprehensive analysis of the literature on the interpretation of the spectra of surface compounds on oxides is presented. This highly illustrated and extensively referenced volume is intended for specialists working in the fields of surface physical chemistry, surface and materials sciences, and adsorption phenomena and is essential reading for those involved in the heterogeneous catalysis by transition metal-oxides.
Book Synopsis Surface Organometallic Chemistry: Molecular Approaches to Surface Catalysis by : Jean-Marie Basset
Download or read book Surface Organometallic Chemistry: Molecular Approaches to Surface Catalysis written by Jean-Marie Basset and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface organometallic chemistry is a new field bringing together researchers from organometallic, inorganic, and surface chemistry and catalysis. Topics ranging from reaction mechanisms to catalyst preparation are considered from a molecular basis, according to which the "active site" on a catalyst surface has a supra-molecular character. This. the first book on the subject, is the outcome of a NATO Workshop held in Le Rouret. France, in May. 1986. It is our hope that the following chapters and the concluding summary of recommendations for research may help to provide a definition of surface organometallic chemistry. Besides catalysis. the central theme of the Workshop, four main topics are considered: 1) Reactions of organometallics with surfaces of metal oxides, metals. and zeolites; 2) Molecular models of surfaces, metal oxides, and metals; 3) Molecular approaches to the mechanisms of surface reactions; 4) Synthesis and modification of zeolites and related microporous solids. Most surface organometallic chemistry has been carried out on amorphous high-surf ace-area metal oxides such as silica. alumina. magnesia, and titania. The first chapter. contributed by KNOZINGER. gives a short summary of the structure and reactivity of metal oxide surfaces. Most of our understanding of these surfaces is based on acid base and redox chemistry; this chemistry has developed from X-ray and spectroscopic data, and much has been inferred from the structures and reactivities of adsorbed organic probe molecules. There are major opportunities for extending this understanding by use of well-defined (single crystal) oxide surfaces and organometallic probe molecules.
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oxygenated Products Form Carbon Monoxide Hydrogenation Over Supported Rhodium and Iridium Catalysts by :
Download or read book Oxygenated Products Form Carbon Monoxide Hydrogenation Over Supported Rhodium and Iridium Catalysts written by and published by . This book was released on 1987 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt:
