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Biomass Fast Pyrolysis Fluidized Bed Reactor
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Book Synopsis Computational Study on Biomass Fast Pyrolysis by : Emilio Ramirez (Chemical engineer)
Download or read book Computational Study on Biomass Fast Pyrolysis written by Emilio Ramirez (Chemical engineer) and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidized bed reactors are utilized in a wide range of chemical industries, including petroleum refining, pharmaceutical and commodity chemicals production, and biomass conversion to fuels and higher-value chemicals. Such reactors are useful where multiple fluids (gases or liquids) and particulate solids are brought together in intimate contact to promote heat and mass transfer and chemical reactions. Recently fluidized-bed research includes computational simulations that provide new insights into the dominant physics and chemistry processes that control reactor performance. Computational simulations were utilized to understand how bubbling-bed hydrodynamics and fast-pyrolysis chemistry interact to control biomass pyrolysis reactor performance. The scope of this work is limited to bubbling bed conditions, designed and operated for lab scale studies of biomass fast pyrolysis, in a bed of inert Geldart Group B sand. Biomass particulates are injected near the bottom of the reactor and rapidly heated to release volatile compounds. The devolatilized biomass particles (char) and released volatile gases transit through the bed (at time scales depending on the hydrodynamic mixing state) and elutriate from the top of the reactor. The bubbling-bed hydrodynamics were simulated with MFiX, an open- source software package based on the two-fluid (continuum) approach for representing the bubbling bed multiphase flows. Processes of interest included the transport of biomass char and released volatile gases, and how these change with fluidizing gas flow, low-intensity bubbling, to slugging, to high- intensity turbulence. A key observation is that fast-pyrolysis tar yield can be increased by reducing the residence time in the freeboard by shortening the freeboard length or by adding secondary air. Also, of interest was how these transport processes are expected to affect the selectivity of product species exiting the top of the reactor. One promising concept for monitoring hydrodynamics in bubbling bed reactors are high- speed pressure measurements to quantify key mixing and transport properties. Computational simulations were utilized to identify quantitative statistical features in high-speed pressure measurements in the upper section of the bed, below the static bed height, to use as process monitoring tools. Other promising directions were identified for future experimental and computational studies.
Book Synopsis Biomass Fast Pyrolysis Fluidized Bed Reactor by : Johnny Matta
Download or read book Biomass Fast Pyrolysis Fluidized Bed Reactor written by Johnny Matta and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Pyrolysis by : Hassan Al- Haj Ibrahim
Download or read book Recent Advances in Pyrolysis written by Hassan Al- Haj Ibrahim and published by BoD – Books on Demand. This book was released on 2020-01-22 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrolysis is an irreversible thermochemical treatment process of materials at elevated temperatures in an inert atmosphere. It is basically a carbonisation process where an organic material is decomposed to produce a solid residue with high (or higher) carbon content and some volatile products. The decomposition reactions are accompanied in general with polymerisation and isomerisation reactions. The end products of pyrolysis can be controlled by optimizing pyrolysis parameters such as temperature and residence time. Pyrolysis is used heavily in the chemical industry to produce many forms of carbon and other chemicals from petroleum, coal, wood, oil shale, biomass or organic waste materials, and it is the basis of several methods for producing fuel from biomass. Pyrolysis also is the process of conversion of buried organic matter into fossil fuels.
Book Synopsis Biomass for Renewable Energy, Fuels, and Chemicals by : Donald L. Klass
Download or read book Biomass for Renewable Energy, Fuels, and Chemicals written by Donald L. Klass and published by Elsevier. This book was released on 1998-07-06 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomass for Renewable Energy, Fuels, and Chemicals serves as a comprehensive introduction to the subject for the student and educator, and is useful for researchers who are interested in the technical details of biomass energy production. The coverage and discussion are multidisciplinary, reflecting the many scientific and engineering disciplines involved. The book will appeal to a broad range of energy professionals and specialists, farmers and foresters who are searching for methods of selecting, growing, and converting energy crops, entrepreneurs who are commercializing biomass energy projects, and those involved in designing solid and liquid waste disposal-energy recovery systems. Presents a graduated treatment from basic principles to the details of specific technologies Includes a critical analysis of many biomass energy research and commercialization activities Proposes several new technical approaches to improve efficiencies, net energy production, and economics Reviews failed projects, as well as successes, and methods for overcoming barriers to commercialization Written by a leader in the field with 40 years of educational, research, and commercialization experience
Book Synopsis Analysis, Design and Fabrication of a Continuous Feed Fluidized-bed Reactor System for Experimentation on Biomass Fast Pyrolysis by : Trevor Gardner Misera
Download or read book Analysis, Design and Fabrication of a Continuous Feed Fluidized-bed Reactor System for Experimentation on Biomass Fast Pyrolysis written by Trevor Gardner Misera and published by . This book was released on 2012 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Pyrolysis of Biomass by : Robert C Brown
Download or read book Fast Pyrolysis of Biomass written by Robert C Brown and published by Royal Society of Chemistry. This book was released on 2017-07-07 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast pyrolysis and related catalytic pyrolysis are of increasing interest as pathways to advanced biofuels that closely mimic traditional petroleum products. Research has moved from empirical investigations to more fundamental studies of pyrolysis mechanisms. Theories on the chemical and physical pathways from plant polymers to pyrolysis products have proliferated as a result. This book brings together the latest developments in pyrolysis science and technology. It examines, reviews and challenges the unresolved and sometimes controversial questions about pyrolysis, helping advance the understanding of this important technology and stimulating discussion on the various competing theories of thermal deconstruction of plant polymers. Beginning with an introduction to the biomass-to-biofuels process via fast pyrolysis and catalytic pyrolysis, chapters address prominent questions such as whether free radicals or concerted reactions dominate deconstruction reactions. Finally, the book concludes with an economic analysis of fast pyrolysis versus catalytic pyrolysis. This book will be of interest to advanced students and researchers interested in the science behind renewable fuel technology, and particularly the thermochemical processing of biomass.
Book Synopsis Fluidization Engineering by : D. Kunii
Download or read book Fluidization Engineering written by D. Kunii and published by Elsevier. This book was released on 2013-10-22 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidization Engineering, Second Edition, expands on its original scope to encompass these new areas and introduces reactor models specifically for these contacting regimes. Completely revised and updated, it is essentially a new book. Its aim is to distill from the thousands of studies those particular developments that are pertinent for the engineer concerned with predictive methods, for the designer, and for the user and potential user of fluidized beds. Covers the recent advances in the field of fluidization. Presents the studies of developments necessary to the engineers, designers, and users of fluidized beds.
Book Synopsis Fast Pyrolysis of Lignin Biomass in Fluidized Bed Reactor by : Saikrishna Mukkamala
Download or read book Fast Pyrolysis of Lignin Biomass in Fluidized Bed Reactor written by Saikrishna Mukkamala and published by . This book was released on 2012 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Pyrolysis of Biomass by : A. V. Bridgwater
Download or read book Fast Pyrolysis of Biomass written by A. V. Bridgwater and published by Cpl Press. This book was released on 1999 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited and updated version of the final report of the IEA Bioenergy Pyrolysis Task, is useful both to newcomers to the subject area and those already involved in research, development, and implementation.
Download or read book Pyrolysis written by Mohamed Samer and published by BoD – Books on Demand. This book was released on 2017-07-05 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides useful information about pyrolysis, which includes the pyrolysis of biomass and pyrolysis of fossil fuels and petrochemicals. Additionally, this book elucidates and illustrates further innovative pyrolysis processes such as catalytic pyrolysis, spray pyrolysis, and microwave-assisted pyrolysis. This book discusses the production of semiconductors and nanomaterials through the pyrolysis process.
Book Synopsis Catalytic Fast Pyrolysis of Biomass in a Bubbling Fluidized Bed Reactor with Gallium Promoted ZSM-5 Catalyst by : Jian Shi
Download or read book Catalytic Fast Pyrolysis of Biomass in a Bubbling Fluidized Bed Reactor with Gallium Promoted ZSM-5 Catalyst written by Jian Shi and published by . This book was released on 2012 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The huge energy demand of our society is causing fossil fuel resources to diminish rapidly. Therefore, it is critical to search for alternative energy resources. Biomass is currently both abundant and inexpensive. Biofuels (fuels produced from biomass) have the potential to replace fossil fuels if a cost effective process can be develop to convert biomass into fuels. Catalytic fast pyrolysis is a technology that can convert biomass into gasoline ranged aromatics in a single step. By heating biomass quickly to an intermediate temperature, biomass will thermally decompose into small molecules which can fit into zeolite catalyst pores. Inside the catalyst pores, these small molecules undergo a series of reactions where aromatics are formed along with olefins, CO, CO2, CH4 and water. Gallium promoted ZSM-5 catalyst has been shown to promote small alkanes aromatization, thus it has the potential to increase aromatic yield in catalytic fast pyrolysis process. The focus of the thesis is to study the behavior of catalyst fast pyrolysis of biomass over Gallium promoted catalyst, and explore various ways to utilize the gas phase olefins to increase the aromatic yield. [CG1] The effect of reaction parameters (temperature, weight hourly space velocity, and fluidized gas velocity) on catalytic fast pyrolysis of biomass with Ga/ZSM-5 were studied in a fluidized bed reactor using pine saw dust as the biomass feed. The product distribution and hydrocarbon selectivity are shown to be a strong function of temperature and weight hourly space velocity. Compared to ZSM-5 catalyst at the same reaction conditions, Ga/ZMS-5 has been shown to increase the aromatic yield by 40%. Olefins can be recycled back to the CFP fluidized bed reactor to further increase the aromatic yield. The olefin co-feeding with pine saw dust experiments indicates that co-feeding with propylene can increase the aromatic yield, however, co-feeding with ethylene will cause a decrease in aromatic yield. In both co-feeding experiments, an increase in the amount of coke formed was also observed. Besides a simple olefin recycle, another possible way to utilize these olefins, while avoiding the high cost to separate them from other gas phase products (CO, CO2 and CH4), is adding a secondary alkylation unit after the fluidized bed reactor. The alkylation unit could provide a way to produce additional ethylbenzene after the main CFP process. Three zeolite catalysts (ZSM-5, Y-zeolite and Beta zeolite) were tested in the alkylation unit, and ZSM-5 catalyst shows the highest activity and selectivity in the alkylation of benzene and ethylene.
Book Synopsis Biomass Gasification and Pyrolysis by : Prabir Basu
Download or read book Biomass Gasification and Pyrolysis written by Prabir Basu and published by Academic Press. This book was released on 2010-07-19 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers comprehensive coverage of the design, analysis, and operational aspects of biomass gasification, the key technology enabling the production of biofuels from all viable sources--some examples being sugar cane and switchgrass. This versatile resource not only explains the basic principles of energy conversion systems, but also provides valuable insight into the design of biomass gasifiers. The author provides many worked out design problems, step-by-step design procedures and real data on commercially operating systems. After fossil fuels, biomass is the most widely used fuel in the world. Biomass resources show a considerable potential in the long term if residues are properly handled and dedicated energy crops are grown. Includes step-by-step design procedures and case studies for Biomass GasificationProvides worked process flow diagrams for gasifier design. Covers integration with other technologies (e.g. gas turbine, engine, fuel cells)
Book Synopsis Fast Pyrolysis of Biomass in a Circulating Fluidised Bed Reactor by : Ioannis Philippos Boukis
Download or read book Fast Pyrolysis of Biomass in a Circulating Fluidised Bed Reactor written by Ioannis Philippos Boukis and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Circulating Fluidized Bed Reactor Model for the Fast Pyrolysis of Biomass for Process Simulation by : Anna A. Trendewicz
Download or read book Development of a Circulating Fluidized Bed Reactor Model for the Fast Pyrolysis of Biomass for Process Simulation written by Anna A. Trendewicz and published by . This book was released on 2015 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Pyrolysis of Palm Kernel Shell Biomass in Fluidized Bed Reactor by : 曾重仁
Download or read book Fast Pyrolysis of Palm Kernel Shell Biomass in Fluidized Bed Reactor written by 曾重仁 and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Thermochemical Biomass Conversion by : A.V. Bridgwater
Download or read book Advances in Thermochemical Biomass Conversion written by A.V. Bridgwater and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 1730 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an account of the state-of-the-art in thermochemical biomass conversion and arises from the third conference in a series sponsored by the International Energy Agency's Bioenergy Agreement. Fundamental and applied research topics are included, reflecting recent advances as well as demonstration and commercial innovation.
Book Synopsis Fast Pyrolysis of Technical Lignins in a Circulating Fluidized Bed Reactor by : Miika Franck
Download or read book Fast Pyrolysis of Technical Lignins in a Circulating Fluidized Bed Reactor written by Miika Franck and published by Cuvillier Verlag. This book was released on 2019-02-25 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: In search of an alternative for chemicals and energy from fossil fuels, lignin pyrolysis is experimentally investigated in a circulating fluidized bed. Deviation in pyrolysis behavior of a softwood Kraft lignin and a wheat straw hydrolysis lignin is analyzed by means of char morphology as well as overall yield and composition determination for gas, oil, and char. The influence of catalytically active mineral matter in lignin on the product distribution is investigated. Progressively, the fluidized bed pyrolysis process is modeled semi-empirically considering fluid dynamics, feedstock composition, micro-particle pyrolysis reactions and mass balances. The lignin secondary reaction kinetics from oil–to–gas are obtained from the Kraft lignin experimental data and a pyrolysis plant with integrated char and permanent gas combustion is modeled with a flowsheeting tool.
