Characterization of Solid Acid Catalysts for Isobutane/butene Alkylation PDF Download
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Author: Alexandru Platon
Publisher:
ISBN:
Category : Alkylation
Languages : en
Pages :
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Author: Alexandru Platon
Publisher:
ISBN:
Category : Alkylation
Languages : en
Pages :
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Author: Chin-Huang Liang
Publisher:
ISBN:
Category : Alkylation
Languages : en
Pages : 201
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Author: Iain Hunter Stewart
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Gabriel Mauricio Santana Castro
Publisher:
ISBN: 9780599738003
Category :
Languages : en
Pages : 193
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Author: Philip Kletnieks
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: American Chemical Society. Division of Petroleum Chemistry
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Cindy Getty
Publisher:
ISBN: 9780530005058
Category : Science
Languages : en
Pages : 222
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Book Description
Abstract: The preparation and use of solid strong acid catalysts and superacids are active areas of research. Solid acids and superacids are reported to exhibit extremely high catalytic activities for reactions such as isomerization, cracking, hydrocracking, dehydration, alkylation, acylation, conversion of methanol to gasoline, and so forth. Recent research in this area has focused on the preparation of stronger solid acids and their characterization. Advantages of solid acid catalysts over liquid acid catalysts include ease of separation from reaction mixture and high selectivity or specific activity. A series of novel solid strong acids has been prepared by treatment of inorganic oxides by Lewis acids. The method of creating or enhancing the number of tetrahedral aluminum centers on inorganic oxides has led to a series of novel solid acid catalysts which displays an increased acidity over the supports alone. Investigations of acid sites by the infrared spectroscopy of adsorbed pyridine, calorimetric titrations and solid-state nuclear magnetic resonance on a series of new solid acid catalysts will be discussed. This new solid acid catalyst system exhibits high catalytic activity and selectivity for cracking reactions under relatively mild conditions. In addition to the reactions of hydrocarbons, the reactions of various polychlorinated molecules have been studied. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "The Preparation, Characterization and Catalytic Activity of a New Sold Acid Catalyst System" by Cindy S. Getty, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Author: H. Hattori
Publisher: Elsevier
ISBN: 008088752X
Category : Technology & Engineering
Languages : en
Pages : 593
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Book Description
Solid acid catalysts are already being used in various processes in petroleum refining and are presently being studied intensively in both academic and applied fields for usage in a variety of reactions. Solid base catalysts are also gaining increasing recognition as potential catalysts. Both acidic and basic catalysts are promising not only with respect to acid and base-catalyzed reactions but also in materials sciences, such as the production of adsorbents, sensors, ceramics, etc.The present volume presents the text of 21 invited oral presentations and 58 poster presentations. The material covers a wide range of aspects on acid-base catalysis, from quantum chemistry to industrialized processes.
Author: Jorge Maximiliano Martinis Coll
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Complex reaction kinetics of the solid acid alkylation of isobutane with butenes over a proton exchanged Y-zeolite has been modeled at the elementary step level. Starting with a computer algorithm that generated the reaction network based on the fundamentals of the carbenium ion chemistry, the formation of over 100+ product species has been modeled in order to gain understanding of the underlying phenomena leading to rapid catalyst deactivation and product selectivity shifts observed in experimental runs. An experimental investigation of the solid acid alkylation process was carried out in a fixed bed catalytic reactor operating with an excess of isobutane under isothermal conditions at moderate temperatures (353-393 K) in liquid phase. Experimental data varying with run-time for a set of butene space-times and reaction temperatures were collected for parameter estimation purposes. A kinetic model was formulated in terms of rate expressions at the elementary step level including a rigorous modeling of deactivation through site coverage. The single event concept was applied to each rate coefficient at the elementary step level to achieve a significant reduction in the number of model parameters. Based on the identification of structural changes leading to the creation or destruction of symmetry axes and chiral centers in an elementary step, formulae have been developed for the calculation of the number of single events. The Evans-Polanyi relationship and the concept of stabilization energy were introduced to account for energy levels in surface-bonded carbenium ions. A novel functional dependency of the stabilization energy with the nature of the carbenium ion and the carbon number was proposed to account for energy effects from the acid sites on the catalyst. Further reductions in the number of parameters and simplification of the equations for the transient pseudohomogeneous one-dimensional plug-flow model of the reactor were achieved by means of thermodynamic constraints. Altogether, the single event concept, the Evans-Polanyi relationship, the stabilization energy approach and the thermodynamic constraints led to a set of 14 parameters necessary for a complete description of solid acid alkylation at the elementary step level.
Author: Michel Che
Publisher: John Wiley & Sons
ISBN: 3527326871
Category : Technology & Engineering
Languages : en
Pages : 1313
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Book Description
This two-volume book provides an overview of physical techniques used to characterize the structure of solid materials, on the one hand, and to investigate the reactivity of their surface, on the other. Therefore this book is a must-have for anyone working in fields related to surface reactivity. Among the latter, and because of its most important industrial impact, catalysis has been used as the directing thread of the book. After the preface and a general introduction to physical techniques by M. Che and J.C. Vedrine, two overviews on physical techniques are presented by G. Ertl and Sir J.M. Thomas for investigating model catalysts and porous catalysts, respectively. The book is organized into four parts: Molecular/Local Spectroscopies, Macroscopic Techniques, Characterization of the Fluid Phase (Gas and/ or Liquid), and Advanced Characterization. Each chapter focuses upon the following important themes: overview of the technique, most important parameters to interpret the experimental data, practical details, applications of the technique, particularly during chemical processes, with its advantages and disadvantages, conclusions.
