Computational Study On Biomass Fast Pyrolysis
DOWNLOAD
Download Computational Study On Biomass Fast Pyrolysis PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Computational Study On Biomass Fast Pyrolysis book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Computational Study On Biomass Fast Pyrolysis
DOWNLOAD
Author : Emilio Ramirez (Chemical engineer)
language : en
Publisher:
Release Date : 2019
Computational Study On Biomass Fast Pyrolysis written by Emilio Ramirez (Chemical engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Biomass chemicals categories.
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.
Fast Pyrolysis Of Biomass
DOWNLOAD
Author : Robert C Brown
language : en
Publisher: Royal Society of Chemistry
Release Date : 2017-06-30
Fast Pyrolysis Of Biomass written by Robert C Brown and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-30 with Science categories.
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.
Recent Advances In Pyrolysis
DOWNLOAD
Author : Hassan Al- Haj Ibrahim
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-01-22
Recent Advances In Pyrolysis written by Hassan Al- Haj Ibrahim and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-22 with Science categories.
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.
Fast Pyrolysis Of Biomass
DOWNLOAD
Author : A. V. Bridgwater
language : en
Publisher: Cpl Press
Release Date : 1999
Fast Pyrolysis Of Biomass written by A. V. Bridgwater and has been published by Cpl Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Science categories.
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.
Advancing Catalytic Fast Pyrolysis Through Integrated Experimentation And Multi Scale Computational Modeling
DOWNLOAD
Author : Michael Griffin (Chemical engineer)
language : en
Publisher:
Release Date : 2021
Advancing Catalytic Fast Pyrolysis Through Integrated Experimentation And Multi Scale Computational Modeling written by Michael Griffin (Chemical engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Biomass conversion categories.
Pyrolysis
DOWNLOAD
Author : Mohamed Samer
language : en
Publisher: BoD – Books on Demand
Release Date : 2017-07-05
Pyrolysis written by Mohamed Samer and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-05 with Science categories.
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.
Coupling Daem And Cfd For Simulating Biomass Fast Pyrolysis In Fluidized Beds
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
Coupling Daem And Cfd For Simulating Biomass Fast Pyrolysis In Fluidized Beds written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
We report results from computational simulations of an experimental, lab-scale bubbling bed biomass pyrolysis reactor that include a distributed activation energy model (DAEM) for the kinetics. In this study, we utilized multiphase computational fluid dynamics (CFD) to account for the turbulent hydrodynamics, and this was combined with the DAEM kinetics in a multi-component, multi-step reaction network. Our results indicate that it is possible to numerically integrate the coupled CFD-DAEM system without significantly increasing computational overhead. It is also clear, however, that reactor operating conditions, reaction kinetics, and multiphase flow dynamics all have major impacts on the pyrolysis products exiting the reactor. We find that, with the same pre-exponential factors and mean activation energies, inclusion of distributed activation energies in the kinetics can shift the predicted average value of the exit vapor-phase tar flux and its statistical distribution, compared to single-valued activation-energy kinetics. Perhaps the most interesting observed trend is that increasing the diversity of the DAEM activation energies appears to increase the mean tar yield, all else being equal. As a result, these findings imply that accurate resolution of the reaction activation energy distributions will be important for optimizing biomass pyrolysis processes.
Pyrolysis Of Biomass For Fuels And Chemicals
DOWNLOAD
Author : Akwasi A. Boateng
language : en
Publisher: Academic Press
Release Date : 2020-05-27
Pyrolysis Of Biomass For Fuels And Chemicals written by Akwasi A. Boateng and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-27 with Science categories.
Pyrolysis of Biomass for Fuels and Chemicals provides a thorough overview of thermochemical conversion of biomass to fuels and chemicals via the pyrolysis platform. The book covers the principles underlying pyrolysis of biomass from the chemical engineering perspective. It discusses thermal-only pyrolysis, the traditional pyrolysis process under inert atmosphere with no catalyst, and the role of catalytic pyrolysis and tail gas reactive pyrolysis in resolving the instability issues associated with product distribution. The addresses condensed phase upgrading where the oil produced can be upgraded for stability or hydrogenated to drop-in transportation fuels, as well as feedstock selection, including opportunity fuels/feedstocks. Finally, pilot and demonstration scale projects from around the world are examined, and some immediate applications of pyrolysis oils in combustion systems are analyzed. Engineering researchers and professionals in the bioenergy, biochemical, and petrochemical fields find in this book a complete resource for understanding the relationships between possible technologies, applications, costs, and products value, as they tackle the challenges for large scale adoption of pyrolysis for the production of 2nd generation biofuels and biochemicals. PhD students in areas of energy, chemical, mechanical, and materials engineering will also benefit from fundamental and applied research in a concise format that can save them time and serve as a reference through bioenergy conversion courses. Covers thermal only pyrolysis, catalytic pyrolysis, and tail gas reactive pyrolysis Examines the relationships between technologies, applications, costs and products value, and end-use Offers a cradle-to-grave approach that includes coverage of feedstocks, their compositional traits, and how they affect conversion technologies with regard to yields, quality of pyrolysis fuel intermediates, and subsequent upgrade to drop-in fuels
Novel Fast Pyrolysis Catalytic Technology For The Production Of Stable Upgraded Liquids
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2013
Novel Fast Pyrolysis Catalytic Technology For The Production Of Stable Upgraded Liquids written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
The objective of the proposed research is the demonstration and development of a novel biomass pyrolysis technology for the production of a stable bio-oil. The approach is to carry out catalytic hydrodeoxygenation (HDO) and upgrading together with pyrolysis in a single fluidized bed reactor with a unique two-level design that permits the physical separation of the two processes. The hydrogen required for the HDO will be generated in the catalytic section by the water-gas shift reaction employing recycled CO produced from the pyrolysis reaction itself. Thus, the use of a reactive recycle stream is another innovation in this technology. The catalysts will be designed in collaboration with BASF Catalysts LLC (formerly Engelhard Corporation), a leader in the manufacture of attrition-resistant cracking catalysts. The proposed work will include reactor modeling with state-of-the-art computational fluid dynamics in a supercomputer, and advanced kinetic analysis for optimization of bio-oil production. The stability of the bio-oil will be determined by viscosity, oxygen content, and acidity determinations in real and accelerated measurements. A multi-faceted team has been assembled to handle laboratory demonstration studies and computational analysis for optimization and scaleup.
Theoretical And Applied Aspects Of Biomass Torrefaction
DOWNLOAD
Author : Stephen Gent
language : en
Publisher: Butterworth-Heinemann
Release Date : 2017-06-16
Theoretical And Applied Aspects Of Biomass Torrefaction written by Stephen Gent and has been published by Butterworth-Heinemann this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-16 with Technology & Engineering categories.
Theoretical and Applied Aspects of Biomass Torrefaction: For Biofuels and Value-Added Products presents a firm foundation of torrefaction technologies and their economic and sustainability aspects. It offers a theoretical background in the underlying principles of torrefaction reactions, including thermodynamics, chemical reactions, process modeling, end-products, and value-added products such as biochar and torr-gas. It also provides an overview of best practices in torrefaction systems, reactor design and scale-up, and compares torrefaction with other thermochemical processing technologies. The authors discuss feedstock availability for a variety of biomass types, such as agricultural residues, woody residues, energy crops and municipal solid waste. They also examine logistics and markets for torrefied products, which includes their use in co-firing and combined heat and power generation, as well as emissions and other environmental aspects. This balanced and thorough approach to the subject matter makes this an excellent resource for engineers, researchers, and graduate students in the field of biomass conversion, especially with background in energy engineering, mechanical engineering, chemical engineering, environmental engineering, biological engineering, and agriculture. Offers a comprehensive overview of torrefaction, balancing theoretical and applied perspectives of torrefaction technologies from a holistic perspective Examines economic and sustainability aspects, including logistics, markets, feedstock, and emissions Presents a variety of relevant, real-world examples that underscore the production and utilization of torrefied material Offers a balanced and thorough approach to the subject, making it an excellent resource for engineers, researchers, and graduate students in the field of biomass conversion