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Structure Activity Relationships In Heterogeneous Catalysts For Hydrocarbon Conversions
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Book Synopsis Structure-activity Relationships in Heterogeneous Catalysts for Hydrocarbon Conversions by : Maricruz Sanchez Sanchez
Download or read book Structure-activity Relationships in Heterogeneous Catalysts for Hydrocarbon Conversions written by Maricruz Sanchez Sanchez and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure-Activity and Selectivity Relationships in Heterogeneous Catalysis by : R.K. Grasselli
Download or read book Structure-Activity and Selectivity Relationships in Heterogeneous Catalysis written by R.K. Grasselli and published by Elsevier. This book was released on 1991-07-09 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure plays an important role in heterogeneous catalysis. It provides a framework for the arrangement and stragetic placement of key catalytic elements, hosting them in a prescribed manner so that their respective electronic properties can exhibit their desired catalytic functions and mutual interactions. Under reaction conditions these framework structures and their catalytic guests undergo dynamic processes becoming active participants of the overall catalytic process. They are not mere static geometric forms. The dynamics of catalytic structures are particularly vivid in selective oxidation catalysis where the lattice of a given catalytic solid partakes as a whole, not only its surface, in the redox processes of the reaction. The catalyst becomes actually a participating reagent. By proper choice of key catalytic elements and their host structures, preferred catalytic pathways can be selected over less desired ones. However, not only in selective redox catalysis does structure play an important role, its importance is also well documented, among others, in shape selective zeolite catalysis, enantioselective hydrogenation and hydrodesulfurization. The contributions presented in this book address the dynamic character of the solid state under catalytic reaction conditions. By relating structure to activity and selectivity in heterogeneous catalysis our understanding of such correlations has been significantly enhanced through the use of sophisticated spectroscopic means, surface science and modeling.
Book Synopsis Structure-activity and Selectivity Relationships in Heterogeneous Catalysis by :
Download or read book Structure-activity and Selectivity Relationships in Heterogeneous Catalysis written by and published by . This book was released on 1991 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure-activity Relationships in Heterogeneous Catalysis by : American Chemical Society. Division of Petroleum Chemistry
Download or read book Structure-activity Relationships in Heterogeneous Catalysis written by American Chemical Society. Division of Petroleum Chemistry and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heterogeneous Catalysis by : Georgiĭ Konstantinovich Boreskov
Download or read book Heterogeneous Catalysis written by Georgiĭ Konstantinovich Boreskov and published by Nova Publishers. This book was released on 2003 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Book Synopsis Design of Heterogeneous Catalysts by : Umit S. Ozkan
Download or read book Design of Heterogeneous Catalysts written by Umit S. Ozkan and published by John Wiley & Sons. This book was released on 2009-02-11 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-awaited reference source is the first book to focus on this important and hot topic. As such, it provides examples from a wide array of fields where catalyst design has been based on new insights and understanding, presenting such modern and important topics as self-assembly, nature-inspired catalysis, nano-scale architecture of surfaces and theoretical methods. With its inclusion of all the useful and powerful tools for the rational design of catalysts, this is a true "must have" book for every researcher in the field.
Book Synopsis Structure-activity and Selectivity Relationships in Heterogeneous Catalysis by : Robert K. Grasselli
Download or read book Structure-activity and Selectivity Relationships in Heterogeneous Catalysis written by Robert K. Grasselli and published by Elsevier Science Limited. This book was released on 1991-01-01 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure plays an important role in heterogeneous catalysis. It provides a framework for the arrangement and stragetic placement of key catalytic elements, hosting them in a prescribed manner so that their respective electronic properties can exhibit their desired catalytic functions and mutual interactions. Under reaction conditions these framework structures and their catalytic guests undergo dynamic processes becoming active participants of the overall catalytic process. They are not mere static geometric forms. The dynamics of catalytic structures are particularly vivid in selective oxidation catalysis where the lattice of a given catalytic solid partakes as a whole, not only its surface, in the redox processes of the reaction. The catalyst becomes actually a participating reagent. By proper choice of key catalytic elements and their host structures, preferred catalytic pathways can be selected over less desired ones. However, not only in selective redox catalysis does structure play an important role, its importance is also well documented, among others, in shape selective zeolite catalysis, enantioselective hydrogenation and hydrodesulfurization. The contributions presented in this book address the dynamic character of the solid state under catalytic reaction conditions. By relating structure to activity and selectivity in heterogeneous catalysis our understanding of such correlations has been significantly enhanced through the use of sophisticated spectroscopic means, surface science and modeling.
Book Synopsis Advances in Catalysis by : D. D. Eley
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:
Book Synopsis Molecular Modeling in Heavy Hydrocarbon Conversions by : Michael T. Klein
Download or read book Molecular Modeling in Heavy Hydrocarbon Conversions written by Michael T. Klein and published by CRC Press. This book was released on 2005-09-28 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past two decades, new modeling efforts have gradually incorporated more molecular and structural detail in response to environmental and technical interests. Molecular Modeling in Heavy Hydrocarbon Conversions introduces a systematic molecule-based modeling approach with a system of chemical engineering software tools that can automate the e
Book Synopsis Implication of Defects in the Bulk Structure of Heterogeneous Catalysts for Structure Activity Relationships by :
Download or read book Implication of Defects in the Bulk Structure of Heterogeneous Catalysts for Structure Activity Relationships written by and published by . This book was released on 2004 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Reactivity of Novel Heterogeneous Catalysts for Hydrocarbon Conversions by : Steven C. Petrosius
Download or read book Development and Reactivity of Novel Heterogeneous Catalysts for Hydrocarbon Conversions written by Steven C. Petrosius and published by . This book was released on 1992 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heterogeneous Catalysts by : Wey Yang Teoh
Download or read book Heterogeneous Catalysts written by Wey Yang Teoh and published by John Wiley & Sons. This book was released on 2021-02-23 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents state-of-the-art knowledge of heterogeneous catalysts including new applications in energy and environmental fields This book focuses on emerging techniques in heterogeneous catalysis, from new methodology for catalysts design and synthesis, surface studies and operando spectroscopies, ab initio techniques, to critical catalytic systems as relevant to energy and the environment. It provides the vision of addressing the foreseeable knowledge gap unfilled by classical knowledge in the field. Heterogeneous Catalysts: Advanced Design, Characterization and Applications begins with an overview on the evolution in catalysts synthesis and introduces readers to facets engineering on catalysts; electrochemical synthesis of nanostructured catalytic thin films; and bandgap engineering of semiconductor photocatalysts. Next, it examines how we are gaining a more precise understanding of catalytic events and materials under working conditions. It covers bridging pressure gap in surface catalytic studies; tomography in catalysts design; and resolving catalyst performance at nanoscale via fluorescence microscopy. Quantum approaches to predicting molecular reactions on catalytic surfaces follows that, along with chapters on Density Functional Theory in heterogeneous catalysis; first principles simulation of electrified interfaces in electrochemistry; and high-throughput computational design of novel catalytic materials. The book also discusses embracing the energy and environmental challenges of the 21st century through heterogeneous catalysis and much more. Presents recent developments in heterogeneous catalysis with emphasis on new fundamentals and emerging techniques Offers a comprehensive look at the important aspects of heterogeneous catalysis Provides an applications-oriented, bottoms-up approach to a high-interest subject that plays a vital role in industry and is widely applied in areas related to energy and environment Heterogeneous Catalysts: Advanced Design, Characterization and Applications is an important book for catalytic chemists, materials scientists, surface chemists, physical chemists, inorganic chemists, chemical engineers, and other professionals working in the chemical industry.
Book Synopsis Structure-activity Relationships for Carbonaceous Heterogeneous Single-site Catalysts Using Ab-initio Simulations by : Nina Michelle Sackers
Download or read book Structure-activity Relationships for Carbonaceous Heterogeneous Single-site Catalysts Using Ab-initio Simulations written by Nina Michelle Sackers and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309444799 Total Pages :137 pages Book Rating :4.3/5 (94 download)
Book Synopsis The Changing Landscape of Hydrocarbon Feedstocks for Chemical Production by : National Academies of Sciences, Engineering, and Medicine
Download or read book The Changing Landscape of Hydrocarbon Feedstocks for Chemical Production written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-12-10 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: A decade ago, the U.S. chemical industry was in decline. Of the more than 40 chemical manufacturing plants being built worldwide in the mid-2000s with more than $1 billion in capitalization, none were under construction in the United States. Today, as a result of abundant domestic supplies of affordable natural gas and natural gas liquids resulting from the dramatic rise in shale gas production, the U.S. chemical industry has gone from the world's highest-cost producer in 2005 to among the lowest-cost producers today. The low cost and increased supply of natural gas and natural gas liquids provides an opportunity to discover and develop new catalysts and processes to enable the direct conversion of natural gas and natural gas liquids into value-added chemicals with a lower carbon footprint. The economic implications of developing advanced technologies to utilize and process natural gas and natural gas liquids for chemical production could be significant, as commodity, intermediate, and fine chemicals represent a higher-economic-value use of shale gas compared with its use as a fuel. To better understand the opportunities for catalysis research in an era of shifting feedstocks for chemical production and to identify the gaps in the current research portfolio, the National Academies of Sciences, Engineering, and Medicine conducted an interactive, multidisciplinary workshop in March 2016. The goal of this workshop was to identify advances in catalysis that can enable the United States to fully realize the potential of the shale gas revolution for the U.S. chemical industry and, as a result, to help target the efforts of U.S. researchers and funding agencies on those areas of science and technology development that are most critical to achieving these advances. This publication summarizes the presentations and discussions from the workshop.
Book Synopsis Aqueous Mediated Heterogeneous Catalysis by : Asit K. Chakraborti
Download or read book Aqueous Mediated Heterogeneous Catalysis written by Asit K. Chakraborti and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-06-21 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterogeneous catalysts are an important tool for greener catalytic processes due to the ease of their removal from the reaction mixture and feasibility of reuse. When these catalysts can operate in the ideal green solvent, water, they improve the sustainability of the process. This book explores aqueous mediated heterogeneous catalysts and their use in synthesis. Topics covered include nanomaterials, quantum dots, metal organic frameworks, and their use as catalysts.
Book Synopsis Insights Into Active Site Structures for Pd-based Bimetallic Heterogeneous Catalysts by : Madelyn Rose Baltus Ball
Download or read book Insights Into Active Site Structures for Pd-based Bimetallic Heterogeneous Catalysts written by Madelyn Rose Baltus Ball and published by . This book was released on 2019 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic reactions play a large role in the production of energy and products used in our modern society. In order to improve the efficiency of existing processes and make the conversion of new feedstocks, such as biomass and natural gas, possible, there exists the need for improved catalytic materials. Many active catalysts have complex active sites containing multiple components; therefore, fundamental understanding of active sites and structure-performance relationships is needed to rationally design new catalysts. The work in this dissertation is focused on catalytic synthesis of well-controlled bimetallic catalysts in order to develop structure-activity and structure-selectivity relations for different chemical transformations. A controlled surface reaction synthesis approach is used to deposit Pd onto Au, Ag, or Cu parent catalysts. These Pd bimetallic catalysts are then studied for reactions where selectivity is a main challenge, and the selective Pd structure is identified. First, AuPd/TiO2 catalysts are studied for the gas phase amination of 1-hexanol using ammonia. It was determined that there are no monometallic Pd structures on the catalysts. The Pd atoms are well diluted in the Au nanoparticles at low loadings and as the Pd loading increases, more contiguous Pd sites are formed. From reactivity studies, it is determined that both the Au and Pd contribute to the overall hexanol conversion, however the activity in enhanced for the bimetallic catalysts compared to the monometallic catalysts. This rate improvement is attributed to a geometric effect where surface intermediates are not stabilized by hydrogen bonding to adsorbed ammonia in close proximity. Furthermore, the selectivity to primary amines is increased as the loading of Pd increases in the AuPd catalysts, while lower Pd loadings favor more substituted products. The selectivity trends are hypothesized to be related to both geometric and electronic effects present in the AuPd catalyst system. Next, AgPd catalysts were studied for the hydrodechlorination of 1,2-dichloroethane. The role of the support in the formation of well-controlled bimetallic nanoparticles was investigated and it was determined that well-mixed AgPd particles were formed on a TiO2 support, while some monometallic Pd particles were also formed on C and SiO2 supports. Again, using chemisorption, XAS, and CO-FTIR, it was determined that isolated Pd atoms within the Ag nanoparticles are formed on the TiO2 support at low loadings. On the SiO2 supported catalysts, contiguous Pd species are formed. The isolated Pd species are highly selective to ethylene while the contiguous Pd species are selective to the undesired ethane. Thus, the support was determined to play an important role in tuning the AgPd structure and the resulting selectivity for hydrodechlorination. The rate of 1,2-dichloroethane conversion was determined to be related to the selectivity, with the ethylene selective catalysts exhibiting the highest turnover frequencies. Finally, AgPd and CuPd catalysts were investigated for the selective hydrogenation of acetylene. Both TiO2 and SiO2 supported catalysts were studied, and it was determined by EDS analysis that the CuPd nanoparticle composition distribution was more uniform on the SiO2 support than on the TiO2 support. IR spectra of the catalyst surface after being exposed to reaction conditions indicate the presence of numerous spectator species and it is determined that there are less sites covered by spectators for the bimetallic catalysts compared to a monometallic Pd catalyst. On the TiO2 support, the bimetallic catalysts exhibit the highest rates per gram of Pd and high ethylene selectivites above 99%. The monometallic catalysts are less than 95% selective to ethane, indicating that the alloy formation improves the ethylene selectivity; the enhanced selectivity is attributed to electronic effects in the bimetallic nanoparticles. This work enabled the development of detailed active site hypotheses for different Pd based bimetallic catalysts and provided insights into the desired structures to inform rational catalyst design. The controlled surface reaction synthesis approach and general characterization methodology can be applied to a broad range of catalyst and reaction systems to improve chemical transformations for improved production of chemicals and fuels for modern society.
Book Synopsis Plasma Catalysis by : Annemie Bogaerts
Download or read book Plasma Catalysis written by Annemie Bogaerts and published by MDPI. This book was released on 2019-04-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, N2 fixation for the synthesis of NH3 or NOx, methane conversion into higher hydrocarbons or oxygenates. It is also widely used for air pollution control (e.g., VOC remediation). Plasma catalysis allows thermodynamically difficult reactions to proceed at ambient pressure and temperature, due to activation of the gas molecules by energetic electrons created in the plasma. However, plasma is very reactive but not selective, and thus a catalyst is needed to improve the selectivity. In spite of the growing interest in plasma catalysis, the underlying mechanisms of the (possible) synergy between plasma and catalyst are not yet fully understood. Indeed, plasma catalysis is quite complicated, as the plasma will affect the catalyst and vice versa. Moreover, due to the reactive plasma environment, the most suitable catalysts will probably be different from thermal catalysts. More research is needed to better understand the plasma–catalyst interactions, in order to further improve the applications.
