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Ethanol Dehydration Over Alumina Catalysts With Phosphorus And Noble Metal Modification
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Book Synopsis Ethanol Dehydration Over Alumina Catalysts with Phosphorus and Noble Metal Modification by : Mutjalin Limlamthong
Download or read book Ethanol Dehydration Over Alumina Catalysts with Phosphorus and Noble Metal Modification written by Mutjalin Limlamthong and published by . This book was released on 2016 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mixture of 1:1 volume ratio of gamma and chi crystalline phase alumina support was prepared via the solvothermal technique using the mixed solution between toluene and 1-butanol. The support was brought to modify with phosphoric acid and noble metal agents. These catalysts were investigated on the effect of both phosphorus loading and types of noble metal on catalytic characteristic and catalytic activity. The catalytic performance was identified through ethanol dehydration reaction in gas phase process at 1 atm and temperature of 200oC to 400oC. The results were found that the phosphorus modification had an effect on catalytic acidity by decreasing the amount of medium to strong acid sites and raised quantity of weak acid sites. The higher amount of weak acid brought the catalysts to demonstrate the higher catalytic activity through the ethanol dehydration to diethyl ether. The mixed phase of alumina supports modified with 5 wt% of phosphorus exhibited the highest catalytic activity among other P-modified alumina catalysts giving the diethyl ether yield of 34.41%. In addition, the different types of noble metal modification were found to have a significant effect on catalytic performance. The 5P/Al2O3 catalyst deposited by palladium showed the highest catalytic activity through all of the studied catalysts reached 57.68% of diethyl ether yield. The highest average yield of diethyl ether of 42.50% was obtained from using Pd5P/Al2O3 catalyst in time on stream system for 10 h. Despite of high diethyl ether yield obtained, both 5P/Al2O3 and Pd5P/Al2O3 catalysts had the lower coke formation when compared to non-modified alumina supports.
Book Synopsis DEHYDRATION AND OXIDATIVE DEHYDROGENATION OF ETHANOL OVER ALUMINA CATALYST MODIFIED WITH SILVER-LITHIUM by : Jakrapan Janlamool
Download or read book DEHYDRATION AND OXIDATIVE DEHYDROGENATION OF ETHANOL OVER ALUMINA CATALYST MODIFIED WITH SILVER-LITHIUM written by Jakrapan Janlamool and published by . This book was released on 2014 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ethanol Dehydration Reaction Over Mixed Phase Alumina Catalysts by : Tharmmanoon Inmanee
Download or read book Ethanol Dehydration Reaction Over Mixed Phase Alumina Catalysts written by Tharmmanoon Inmanee and published by . This book was released on 2013 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mixed gamma and chi crystalline phase alumina catalyst prepared by the solvothermal method of the mixed solution (toluene and 1-butanol) was investigated for the effect of calcination temperatures and MoO3 modification. The catalysts were characterized by X-ray diffraction (XRD), N2 physisorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and NH3-tempearture programmed desorption (NH3-TPD). The catalytic activity was tested for ethylene production by dehydration reaction of ethanol in gas phase at atmospheric pressure and temperature between 200°C to 400°C. It was found that the calcination temperature and MoO3 loading have an effect on acidity of the catalysts. The increasing in calcination temperature resulted in decreased acidity while the MoO3 loading on the mixed phase alumina catalyst yielded increased acidity especially medium to strong acid. In this study, the catalytic activity of ethanol dehydration to ethylene apparently depends on the medium to strong acid. The mixed phase alumina catalyst calcined at 600°C (C50-600) gave the highest catalytic activity and the MoO3 modified catalysts promoted dehydrogenation reaction.
Book Synopsis Catalysis of Ethanol Dehydration on Attrition-milled Alumina by : Haneef Ahmed Bharoocha
Download or read book Catalysis of Ethanol Dehydration on Attrition-milled Alumina written by Haneef Ahmed Bharoocha and published by . This book was released on 1978 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hemicellulose Biorefinery: A Sustainable Solution for Value Addition to Bio-Based Products and Bioenergy by : Michel Brienzo
Download or read book Hemicellulose Biorefinery: A Sustainable Solution for Value Addition to Bio-Based Products and Bioenergy written by Michel Brienzo and published by Springer Nature. This book was released on 2022-01-03 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book provides knowledge about hemicelluloses biorefinery approaching production life cycle, circular economy, and valorization by obtaining value-added bioproducts and bioenergy. A special focus is dedicated to chemical and biochemical compounds produced from the hemicelluloses derivatives platform. Hemicelluloses are polysaccharides located into plant cell wall, with diverse chemical structures and properties. It is the second most spread organic polymer on nature and found in vast lignocellulosic materials from agro and industrial wastes, therefore, hemicelluloses are considered as abundant and renewable raw material/feedstock. Biorefinery concept contributes to hemicelluloses production associated with biomass industrial processes. Hemicelluloses are alternative sources of sugars for renewable fuels and as platform for chemicals production. This book reviews chemical processes for sugar production and degradation, obtaining of intermediate and final products, and challenges for pentose fermentation. Aspects of hemicelluloses chain chemical and enzymatic modifications are presented with focus on physicochemical properties improvement for bioplastic and biomaterial approaches. Hemicelluloses are presented as sources for advanced materials in biomedical and pharmaceutical uses, and as hydrogel for chemical and medicine deliveries. An interdisciplinary approach is needed to cover all the processes involving hemicelluloses, its conversion into final and intermediate value-added compounds, and bioenergy production. Covering this context, this book is of interest to teachers, students, researchers, and scientists dedicated to biomass valorization. This book is a knowledge source of basic aspects to advanced processing and application for graduate students, particularly. Besides, the book serves as additional reading material for undergraduate students (from different courses) with a deep interest in biomass and waste conversion, valorization, and chemical products from hemicelluloses
Download or read book Catalysis written by James Spivey and published by Royal Society of Chemistry. This book was released on 2019-03-15 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysts are required for a variety of applications and researchers are increasingly challenged to find cost effective and environmentally benign catalysts to use. This volume looks at modern approaches to catalysis and reviews the extensive literature including direct methane conversion, nanocomposite catalysts for transformation of biofuels into syngas and hydrogen, and catalytic wet air oxidation technology for industrial wastewater treatment. Appealing broadly to researchers in academia and industry, it will be of great benefit to any researcher wanting a succinct reference on developments in this area now and looking to the future.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acidity and Basicity by : Eike Brunner
Download or read book Acidity and Basicity written by Eike Brunner and published by Springer Science & Business Media. This book was released on 2008-02-20 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first handbook on zeolites and other microporous materials. It is an up-to-date, highly sophisticated collection of information for those who deal with zeolites in industry or at academic institutions as well as being a guide for newcomers.
Download or read book Journal of Applied Chemistry written by and published by . This book was released on 1968 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid Base Catalysis by : Yoshio Ono
Download or read book Solid Base Catalysis written by Yoshio Ono and published by Springer Science & Business Media. This book was released on 2012-08-31 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of solid base catalysts has come to be recognized for their environmentally benign qualities, and much significant progress has been made over the past two decades in catalytic materials and solid base-catalyzed reactions. The book is focused on the solid base. Because of the advantages over liquid bases, the use of solid base catalysts in organic synthesis is expanding. Solid bases are easier to dispose than liquid bases, separation and recovery of products, catalysts and solvents are less difficult, and they are non-corrosive. Furthermore, base-catalyzed reactions can be performed without using solvents and even in the gas phase, opening up more possibilities for discovering novel reaction systems. Using numerous examples, the present volume describes the remarkable role solid base catalysis can play, given the ever increasing worldwide importance of "green" chemistry. The reader will obtain an overall view of solid base catalysis and gain insight into the versatility of the reactions to which solid base catalysts can be utilized. The concept and significance of solid base catalysis are discussed, followed by descriptions of various methods for the characterization of solid bases, including spectroscopic methods and test reactions. The preparation and properties of base materials are presented in detail, with the two final chapters devoted to surveying the variety of reactions catalyzed by solid bases.
Book Synopsis Processing of Biomass Waste by : Angana Sarkar
Download or read book Processing of Biomass Waste written by Angana Sarkar and published by Elsevier. This book was released on 2024-04-25 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Processing of Biomass Waste: Technological Upgradation and Advancement focuses on the exploitation of various waste management technologies and their associated process (microbial/chemical/physical) as tools to simultaneously generate value during treatment processes, including degradation/detoxification/stabilization toxic and hazardous contaminants. The book explores wastes as a veritable resource for wealth creation, with particular focus on resources recoverable from diverse wastes using special intervention of biotechnological tools. Other sections highlight recent technologies of waste bioprocessing in biorefinery approaches and enlighten on different approaches. The book encompasses advanced and updated information as well as future directions for young researchers and scientists who are working in the field of waste management, with a focus on sustainable value generation. Includes cutting-edge technologies in waste bioprocessing Focuses on applications of molecular biotechnological tools in waste bioprocessing Provides natural and eco-friendly solutions to deal with the problem of pollution aiming value generation Details underlying mechanisms of waste bioprocessing approaches that cover microbes for the simultaneous value generation and removal of emerging contaminants Includes field studies on the application of biorefinery approach for eco-restoration of contaminated sites Presents recent advances and challenges in waste bioprocessing research and applications for sustainable development
Book Synopsis Thermochemical Conversion of Biomass to Liquid Fuels and Chemicals by : Mark Crocker
Download or read book Thermochemical Conversion of Biomass to Liquid Fuels and Chemicals written by Mark Crocker and published by Royal Society of Chemistry. This book was released on 2010-09-10 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is increasing recognition that low-cost, high capacity processes for the conversion of biomass into fuels and chemicals are essential for expanding the utilization of carbon neutral processes, reducing dependency on fossil fuel resources, and increasing rural income. While much attention has focused on the use of biomass to produce ethanol via fermentation, high capacity processes are also required for the production of hydrocarbon fuels and chemicals from lignocellulosic biomass. In this context, this book provides an up-to-date overview of the thermochemical methods available for biomass conversion to liquid fuels and chemicals. In addition to traditional conversion technologies such as fast pyrolysis, new developments are considered, including catalytic routes for the production of liquid fuels from carbohydrates and the use of ionic liquids for lignocellulose utilization. The individual chapters, written by experts in the field, provide an introduction to each topic, as well as describing recent research developments.
Book Synopsis Zeolites in Catalysis by : Jiří Čejka
Download or read book Zeolites in Catalysis written by Jiří Čejka and published by Royal Society of Chemistry. This book was released on 2017-06-07 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accessible references for researchers and industrialists in this exciting field, covering both developments and applications of catalysis.
Book Synopsis Supported Catalysts and Their Applications by : David C Sherrington
Download or read book Supported Catalysts and Their Applications written by David C Sherrington and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to improve both the efficiency and environmental acceptability of industrial processes is driving the development of heterogeneous catalysts across the chemical industry, including commodity, specialty and fine chemicals and in pharmaceuticals and agrochemicals. Drawing on international research, Supported Catalysts and their Applications discusses aspects of the design, synthesis and application of solid supported reagents and catalysts, including supported reagents for multi-step organic synthesis; selectivity in oxidation catalysis; mesoporous molecular sieve catalysts; and the use of Zeolite Beta in organic reactions. In addition, the two discrete areas of heterogeneous catalysis (inorganic oxide materials and polymer-based catalysts) that were developing in parallel are now shown to be converging, which will be of great benefit to the whole field. Providing a snapshot of the state-of-the-art in this fast-moving field, this book will be welcomed by industrialists and researchers, particularly in the agrochemicals and pharmaceuticals industries.
Book Synopsis CO2 Hydrogenation Catalysis by : Yuichiro Himeda
Download or read book CO2 Hydrogenation Catalysis written by Yuichiro Himeda and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the effective catalysts and latest advances in CO2 conversion in chemicals and fuels Carbon dioxide hydrogenation is one of the most promising and economic techniques to utilize CO2 emissions to produce value-added chemicals. With contributions from an international team of experts on the topic, CO2 Hydrogenation Catalysis offers a comprehensive review of the most recent developments in the catalytic hydrogenation of carbon dioxide to formic acid/formate, methanol, methane, and C2+ products. The book explores the electroreduction of carbon dioxide and contains an overview on hydrogen production from formic acid and methanol. With a practical review of the advances and challenges in future CO2 hydrogenation research, the book provides an important guide for researchers in academia and industry working in the field of catalysis, organometallic chemistry, green and sustainable chemistry, as well as energy conversion and storage. This important book: Offers a unique review of effective catalysts and the latest advances in CO2 conversion Explores how to utilize CO2 emissions to produce value-added chemicals and fuels such as methanol, olefins, gasoline, aromatics Includes the latest research in homogeneous and heterogeneous catalysis as well as electrocatalysis Highlights advances and challenges for future investigation Written for chemists, catalytic chemists, electrochemists, chemists in industry, and chemical engineers, CO2 Hydrogenation Catalysis offers a comprehensive resource to understanding how CO2 emissions can create value-added chemicals.
Book Synopsis Raman and SERS Investigations of Pharmaceuticals by : Monica Baia
Download or read book Raman and SERS Investigations of Pharmaceuticals written by Monica Baia and published by Springer Science & Business Media. This book was released on 2008-06-11 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last several years it has become apparent to most researchers that interdisciplinary research is the key to success in the sciences’ future. The present book exemplifies such interdisciplinary work. Thus, some new derivatives have been prepared by chemists and consecutively analyzed by physicists in order to better understand their physical-chemical properties for future tests to be performed by pharmacists. The book consists of an introductory section and other eight chapters. First, the fundamentals of infrared, Raman and surface-enhanced Raman spectroscopy and those of the theoretical methods employed for the vibrational prediction modes are highlighted. The SERS investigations illustrated in the following chapters are focused on different kinds of drugs: tranquilizers and sedatives, anti-inflammatory drugs, vitamins, drugs with anti-bacterial properties, etc. Since there is an increased interest in designing highly effective and controllable SERS-active substrates, a few newly developed substrates that could contribute to a deeper understanding and knowledge of the adsorption behavior of various types of molecules of pharmaceutical and medical interest are also presented.
Book Synopsis Kinetics of Chemical Processes by : Michel Boudart
Download or read book Kinetics of Chemical Processes written by Michel Boudart and published by Elsevier. This book was released on 2014-05-16 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kinetics of Chemical Processes details the concepts associated with the kinetic study of the chemical processes. The book is comprised of 10 chapters that present information relevant to applied research. The text first covers the elementary chemical kinetics of elementary steps, and then proceeds to discussing catalysis. The next chapter tackles simplified kinetics of sequences at the steady state. Chapter 5 deals with coupled sequences in reaction networks, while Chapter 6 talks about autocatalysis and inhibition. The seventh chapter describes the irreducible transport phenomena in chemical kinetics. The next two chapters discuss the correlations in homogenous kinetics and heterogeneous catalysis, respectively. The last chapter covers the analysis of reaction networks. The book will be of great use to students, researchers, and practitioners of scientific disciplines that deal with chemical reaction, particularly chemistry and chemical engineering.
