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Author : Victor K. Shum
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (575 download)
Download or read book Enhanced Activity Maintenance of Platinum-rhenium-alumina Catalysts written by Victor K. Shum and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Effect of Rhenium, Sulfur and Alumina on the Conversion of Hydrocarbons Over Platinum Single Crystals written by and published by . This book was released on 1992 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conversion reactions of hydrocarbons over Pt-Re model catalyst surfaces modified by sulfur and alumina have been studied. A plasma deposition source has been developed to deposit Pt, Re, and Al on metal substrates variable coverage in ultrahigh vacuum without excessive heating. Conversion of n-hexane was performed over the Re-covered Pt and Pt-covered Re surfaces. The presence of the second metal increased hydrogenolysis activity of both Pt-Re surfaces. Addition of sulfur on the model Catalyst surfaces suppressed hydrogenolysis activity and increased the cyclization rate of n-hexane to methylcyclopentane over Pt-Re surfaces. Sulfiding also increased the dehydrogenation rate of cyclohexane to benzene Over Pt-Re surfaces. It has been proposed that the PtRe bimetallic catalysts show unique properties when combined with sulfur, and electronic interactions exist between platinum, rhenium and sulfur. Decomposition of hydrocarbons on the sulfur-covered Pt-Re surfaces supported that argument. For the conversion of 1-butene over the planar Pt/AlO(subscript x), the addition of Pt increased the selectivity of hydrogenation over isomerization.
Author : John Butt
Publisher : Elsevier
ISBN 13 : 0323140866
Total Pages : 506 pages
Book Rating : 4.3/5 (231 download)
Download or read book Activation, Deactivation, and Poisoning of Catalysts written by John Butt and published by Elsevier. This book was released on 2012-12-02 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activation, Deactivation, and Poisoning of Catalysts deals with the circumstances and mechanisms underlying catalyst activation, deactivation, and poisoning. The emphasis is on the techniques for handling deactivating systems, not on results per se. Deactivation by fouling and sintering is given consideration. This book is organized into three sections and consists of 12 chapters. The first part is devoted to a systematic development of the manner in which catalysts are activated, deactivated, poisoned, and in some cases reactivated on a microscopic basis. The first chapter explains the concept of the active center as utilized in catalysis, along with catalyst regeneration, rejuvenation, and detoxification. In the second part, the reader is introduced to the problem of heat transfer as well as the transport of reactants and products in the interior of the particle coupled with chemical reaction therein. The macroscopic deactivation behavior of the catalyst particle is described in terms of fundamental kinetic deactivation phenomena and of parameters governing heat and mass transfer. The last part is primarily concerned with a collection of catalyst particles within the reactor, with emphasis on the global activity of the reactor. In the last chapter, a pragmatic approach is presented to predict the design and performance of chemical reactors containing a deactivating catalyst. This book is written for catalytic chemists, researchers, reactor designers, and students interested in catalyst activation, deactivation, and poisoning.
Author : G.F. Froment
Publisher : Elsevier
ISBN 13 : 0080960685
Total Pages : 681 pages
Book Rating : 4.0/5 (89 download)
Download or read book Catalyst Deactivation 1987 written by G.F. Froment and published by Elsevier. This book was released on 1987-09-01 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Symposium on Catalyst Deactivation ensues those held at Berkeley (1985), Antwerp (1980) and Berkeley (1978).The three main topics emphasised at this most recent symposium were: the techniques used in deactivation studies, the mechanisms of catalyst deactivation, and modelling. With respect to the first, it became apparent that the study of deactivation faces even more difficulties than the characterization of fresh catalysts and the measurement of activity or selectivity, due to the multiplicity of interacting processes occurring during deactivation. Quite substantial progress has been made recently in the understanding of the mechanisms of various deactivation processes, particularly coking, and extra time was accorded to these topics at the symposium. The third topic corresponds to a problem which is very central to development studies and to the chemical engineering aspect of catalysis: it deals with the representativity of accelerated tests and the modelling of the deactivation phenomena.
Author : Ching-Sheng Buu
Publisher :
ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.:/5 (918 download)
Download or read book The Catalytic Reforming of Methylcyclohexane Over Platinum-alumina and Platinum + Rhenium-alumina Catalysts written by Ching-Sheng Buu and published by . This book was released on 1980 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G Libowitz
Publisher : Elsevier
ISBN 13 : 0323145531
Total Pages : 574 pages
Book Rating : 4.3/5 (231 download)
Download or read book Materials Science in Energy Technology written by G Libowitz and published by Elsevier. This book was released on 2012-12-02 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Science in Energy Technology presents the fundamental properties of materials that are essential to a particular energy application. This book discusses the areas of research required for the development of other materials for that application. Organized into 10 chapters, this book starts with an overview of the methods of producing energy, which are arranged in approximate chronological order as to when the methods were or will be first utilized. This text then reviews the wide scope of materials associated with nuclear fission technology. Other chapters consider the major materials requirements and problems for ceramics in magnetohydrodynamic (MHD) power generators. This book discusses as well the three processes that are involved in the photovoltaic effect, including light absorption, charge separation in the photovoltaic cell, and migration of charge carriers. The final chapter deals with the physical properties of superconductors. This book is a valuable resource for materials scientists, metallurgists, physicists, and chemists.
Author : Changmin Kim
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (33 download)
Download or read book The Effect of Rhenium, Sulfur and Alumina on the Conversion of Hydrocarbons Over Platinum Single Crystals written by Changmin Kim and published by . This book was released on 1992 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yasuhiro Iwasawa
Publisher : World Scientific
ISBN 13 : 9789810223236
Total Pages : 438 pages
Book Rating : 4.2/5 (232 download)
Download or read book X-ray Absorption Fine Structure for Catalysts and Surfaces written by Yasuhiro Iwasawa and published by World Scientific. This book was released on 1996 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray absorption fine structure (XAFS) is a powerful technique in characterization of structures and electronic states of materials in many research fields including, e.g., catalysts, semiconductors, optical ingredients, magnetic materials, and surfaces. This characterization technique could be applied in a static or a dynamic state (in-situ condition). The XAFS can provide information that is not accessible by other techniques for characterization of materials, particularly catalysts and related surfaces. Furthermore, XAFS can provide a molecular-level approach to the study of reaction mechanisms for the understanding of catalysts and development of new catalysts. A number of synchrotron radiation facilities have been planned to be built in Asian countries in addition to the high-brilliant synchrotron radiation facilities under construction in the USA, Europe, and Japan. The applications of XAFS have now expanded to catalytic chemistry and engineering, surface science, organometallic chemistry, materials science, solid-state chemistry, geophysics, etc. This book caters to a wide range of researchers and students working in the domain or related topics.
Author :
Publisher :
ISBN 13 :
Total Pages : 1116 pages
Book Rating : 4.3/5 (91 download)
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lawrence William Jossens
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (21 download)
Download or read book On the Role of Rhenium in Stabilizing Platinum-aluminum Oxide Reforming Catalysts written by Lawrence William Jossens and published by . This book was released on 1981 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 812 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1990 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (318 download)
Download or read book Platinum Metals Review written by and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Laura Jean Sanborn
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (7 download)
Download or read book A Comparative Study of Supported Platinum and Platinum-rhenium Reforming Catalysts Using the Kinetics of Methylcyclohexane Dehydrogenation written by Laura Jean Sanborn and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John H. Sinfelt
Publisher : Wiley-Interscience
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.:/5 (44 download)
Download or read book Bimetallic Catalysts written by John H. Sinfelt and published by Wiley-Interscience. This book was released on 1983-09-29 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents an account of the research on bimetallic catalysts. Focuses attention on the possibility of influencing the selectivity of chemical transformations on metal surfaces and preparing metal alloys in a highly dispersed state. Covers the validation and elucidation of the bimetallic cluster concept. Includes figures and tables.
Author : American Chemical Society, Committee on Professional Training Staff
Publisher :
ISBN 13 : 9780841214187
Total Pages : 1390 pages
Book Rating : 4.2/5 (141 download)
Download or read book American Chemical Society Directory of Graduate Research, 1987 written by American Chemical Society, Committee on Professional Training Staff and published by . This book was released on 1987 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter A. Psaras
Publisher : National Academies Press
ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.:/5 (45 download)
Download or read book Advancing Materials Research written by Peter A. Psaras and published by National Academies Press. This book was released on 1987 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 536 pages
Book Rating : 4.:/5 (318 download)
Download or read book Actes written by and published by . This book was released on 1988 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
