Download or read book Catalytic Microwave Pyrolysis of Biomass for Renewable Phenols and Fuels written by Quan Bu and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bio-oil is an unstable intermediate and needs to be upgraded before its use. This study focused on improving the selectivity of bio-oilby catalytic pyrolysis of biomass using activated carbon (AC) catalysts. Firstly, the effects of process conditions on product quality and product yield were investigated by catalytic microwave pyrolysis of biomass using AC as a catalyst. The optimized reaction condition for bio-oil and volatile was determined. Chemical composition analysis by GC/MS showed that phenols rich bio-oils were obtained. Furthermore, the effects of different carbon sources based AC catalysts on products yield and chemical composition selectivity of obtained bio-oils were investigated during microwave pyrolysis of Douglas fir pellet. The catalysts recycling test of the selected catalysts indicated that the AC catalysts can be used for 3-4 times with high concentration of phenolic compounds. The individual surface polar/acidic oxygen functional groups analysis suggested the changes of functional groups in ACs explained the reaction mechanism of this process. In addition, the potential for production of renewable phenols and fuels by catalytic pyrolysis of biomass using lignin as a model compound was explored. The main chemical compounds of the obtained bio-oils were phenols, guaiacols, hydrocarbons and esters. The thermal decomposition behaviors of lignin and kinetics study were investigated by TGA. The change of functional groups of AC catalyst indicated the bio-oil reduction was related to the reaction mechanism of this process. Finally, the effects of Fe-modified AC catalyst on bio-oil upgrading and kintic study of biomass pyrolysis were investigated. The catalytic pyrolysis of biomass using the Fe-modified AC catalyst may promote the occurrence of the fragmentation of cellulose, rather than repolymerization as in the non-catalytic pyrolysis which leads to partial of guaiacols derived from furans. Results showed that the main chemical compounds of bio-oils were furans, phenols, guaiacols, and ketones/ethers. The activation energy of Douglas fir by microwave pyrolysis was remarkable lower than by conventional pyrolysis using TGA. And the reaction mechanism of this process was analyzed.
Download or read book Production of Biofuels and Chemicals with Microwave written by Zhen Fang and published by Springer. This book was released on 2014-11-26 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conversion of biomass into chemicals and biofuels is an active research and development area as trends move to replace traditional fossil fuels with renewable resources. By integrating processing methods with microwave and ultrasound irradiation into biorefineries, the time-scale of many operations can be greatly reduced while the efficiency of the reactions can be remarkably increased so that process intensification can be achieved. “Production of Biofuels and Chemicals with Microwave” and “Production of Biofuels and Chemicals with Ultrasound” are two independent volumes in the Biofuels and Biorefineries series that take different, but complementary approaches for the pretreatment and chemical transformation of biomass into chemicals and biofuels. The volume “Microwave” provides current research advances and prospects in theoretical and practical aspects of microwave irradiation including properties, effects and temperature monitoring, design of chemical reactors, synergistic effects on combining microwave, ultrasound, hydrodynamic cavitation and high-shear mixing into processes, chemical and catalytic conversion of lignin into chemicals, pyrolysis and gasification, syngas production from wastes, platform chemicals, algal biodiesel, cellulose-based nanocomposites, lignocellulosic biomass pretreatment, green chemistry metrics and energy consumption and techno-economic analysis for a catalytic pyrolysis facility that processes pellets into aromatics. Each of the 12 chapters has been peer-reviewed and edited to improve both the quality of the text and the scope and coverage of the topics. Both volumes “Microwave” and “Ultrasound” are references designed for students, researchers, academicians and industrialists in the fields of chemistry and chemical engineering and include introductory chapters to highlight present concepts of the fundamental technologies and their application. Dr. Zhen Fang is Professor in Bioenergy, Leader and founder of biomass group, Chinese Academy of Sciences, Xishuangbanna Tropical Botanical Garden and is also adjunct Professor of Life Sciences, University of Science and Technology of China. Dr. Richard L Smith, Jr. is Professor of Chemical Engineering, Graduate School of Environmental Studies, Research Center of Supercritical Fluid Technology, Tohoku University, Japan. Dr. Xinhua Qi is Professor of Environmental Science, Nankai University, China.
Download or read book Production of Biofuels and Chemicals with Pyrolysis written by Zhen Fang and published by Springer Nature. This book was released on 2020-10-27 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a collection of studies on state-of-art techniques for converting biomass to chemical products by means of pyrolysis, which are widely applicable to the valorization of biomass. In addition to discussing the fundamentals and mechanisms for producing bio-oils, chemicals, gases and biochar using pyrolysis, it outlines key reaction parameters and reactor configurations for various types of biomass. Written by leading experts and providing a broad range of perspectives on cutting-edge applications, the book is a comprehensive reference guide for academic researchers and industrial engineers in the fields of natural renewable materials, biorefinery of lignocellulose, biofuels, and environmental engineering, and a valuable resource for university students in the fields of chemical engineering, material science and environmental engineering.
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.
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.
Download or read book Microwaves in Catalysis written by Satoshi Horikoshi and published by John Wiley & Sons. This book was released on 2015-12-14 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview covering the principles and preparation of catalysts, as well as reactor technology and applications in the field of organic synthesis, energy production, and environmental catalysis. Edited and authored by renowned and experienced scientists, this reference focuses on successful reaction procedures for applications in industry. Topics include catalyst preparation, the treatment of waste water and air, biomass and waste valorisation, hydrogen production, oil refining as well as organic synthesis in the presence of heterogeneous and homogeneous catalysts and continuous-flow reactions. With its practical relevance and successful methodologies, this is a valuable guide for chemists at universities working in the field of catalysis, organic synthesis, pharmaceutical or green chemistry, as well as researchers and engineers in the chemical industry.
Download or read book Chemical Catalysts for Biomass Upgrading written by Mark Crocker and published by John Wiley & Sons. This book was released on 2020-03-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference to the use of innovative catalysts and processes to turn biomass into value-added chemicals Chemical Catalysts for Biomass Upgrading offers detailed descriptions of catalysts and catalytic processes employed in the synthesis of chemicals and fuels from the most abundant and important biomass types. The contributors?noted experts on the topic?focus on the application of catalysts to the pyrolysis of whole biomass and to the upgrading of bio-oils. The authors discuss catalytic approaches to the processing of biomass-derived oxygenates, as exemplified by sugars, via reactions such as reforming, hydrogenation, oxidation, and condensation reactions. Additionally, the book provides an overview of catalysts for lignin valorization via oxidative and reductive methods and considers the conversion of fats and oils to fuels and terminal olefins by means of esterification/transesterification, hydrodeoxygenation, and decarboxylation/decarbonylation processes. The authors also provide an overview of conversion processes based on terpenes and chitin, two emerging feedstocks with a rich chemistry, and summarize some of the emerging trends in the field. This important book: -Provides a comprehensive review of innovative catalysts, catalytic processes, and catalyst design -Offers a guide to one of the most promising ways to find useful alternatives for fossil fuel resources -Includes information on the most abundant and important types of biomass feedstocks -Examines fields such as catalytic cracking, pyrolysis, depolymerization, and many more Written for catalytic chemists, process engineers, environmental chemists, bioengineers, organic chemists, and polymer chemists, Chemical Catalysts for Biomass Upgrading presents deep insights on the most important aspects of biomass upgrading and their various types.
Download or read book Development of Microwave Pyrolysis Biochar as Carbon Catalysts for High Value Chemicals and Hydrocarbons written by Lei Zhu and published by . This book was released on 2016 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic pyrolysis of lignocellulosic biomass is considered as a promising thermochemical process for the production of fuels and chemicals, which are currently obtained from petrochemical infrastructure. With the development of biomass pyrolysis, increasing amount of biochar will be produced for applications. Most of the biochar exploitation mainly highlighted in the area of water treatment and soil amendment. However, the potential value of the pyrolysis biochar used as carbon based catalyst is still in its infancy. This PhD dissertation aims to investigate the technical and economic feasibility of a low cost biochar catalyst for microwave-assisted catalytic biomass pyrolysis, and to obtain upgrading bio-oil with increased hydrocarbon yields and low oxygen content. Furthermore, upgrade it into alternative transportation fuels and commodity chemicals. The results indicated that the surface functional groups of biochar were significantly influenced by the pyrolysis temperature and residence time. An adequate prediction model was developed to describe the development of carbon surface functional groups. The in situ catalytic pyrolysis of Douglas fir pellets with biochar catalysts was performed in a microwave reactor. The highest amount of hydrocarbons yield (up to 52.77% selectivity of bio-oil) was achieved from catalytic pyrolysis over biochar catalyst. A non-condensable gas enriched in H2, CO, and CO 2 was observed, and analyzed by micro-GC. The amounts of H2 and CO increased during catalytic pyrolysis compared to the non-catalytic runs. GC/MS analysis results showed that the quantity of lignin derived guaiacols decreased dramatically with the increase of the ratio of catalyst to biomass. The biochar catalyst exhibited good selectivity towards hydrocarbon and phenol compounds, simplifying the chemical composition, reducing undesirable compounds and producing pyrolysis oil at an acceptable yield. Based on these outcomes, structural characteristics, thermal behavior and reaction kinetics regarding non-catalytic pyrolysis and catalytic pyrolysis over biochar catalysts were also studied. In addition, the techno-economic analysis of the integrated microwave assisted catalytic pyrolysis processes from lignocellulosic biomass to renewable hydrocarbon and commodity chemicals was evaluated in the dissertation as well. Modification and characterization of biochar could be a new way to improve or extend their catalytic application in biomass conversion and bio-oil upgrading.
Download or read book Microwave Mediated Biofuel Production written by Veera G. Gude and published by CRC Press. This book was released on 2017-08-22 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on chemical syntheses and processes for biofuel production mediated by microwave energy. This is the first contribution in this area serving as a resource and guidance manual for understanding the principles, mechanisms, design, and applications of microwaves in biofuel process chemistry. Green chemistry of microwave-mediated biofuel reactions and thermodynamic potentials for the process biochemistry are the focus of this book. Microwave generation, wave propagation, process design, development and configurations, and biofuel applications are discussed in detail.
Download or read book Catalytic Microwave Torrefaction and Pyrolysis of Douglas Fir Pellet to Improve Biofuel Quality written by Shoujie Ren and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aims of this dissertation were to understand the effects of torrefaction as pretreatment on biomass pyrolysis and catalytic pyrolysis for improving biofuel quality, and the feasibility of biochar as a cheap catalyst for hydrocarbons production in biomass catalytic pyrolysis and bio-oil upgrading. The process conditions for microwave torrefaction and pyrolysis of Douglas fir sawdust pellets were optimized. Microwave pyrolysis of Douglas fir sawdust pellet produced a comparative bio-oil yield with those from fluidized-bed pyrolysis at the optimization conditions. The phenols and guaiacols accounted for the largest amount of chemicals in the bio-oil. The specific phenolic chemicals are highly related to the reaction temperature. The torrefaction conditions, such as reaction temperature and time, significantly influenced the yields of products. The bio-oils from torrefaction contained valuable chemicals. The energy yields of torrefied biomass ranging 67.03-90.06% implied that most energy was retained in the torrefied biomass. Torrefaction as pretreatment in biomass pyrolysis favored the phenols and sugar production, producing about 3.21 to 7.50 area% hydrocarbons while reducing organic acids and furans in bio-oils. Torrefaction also altered the compositions of syngas by reducing CO2 and increasing H2 and CH4. Torrefaction improved the phenols, hydrocarbons, and hydrogen production in catalytic microwave pyrolysis. The phenols, hydrocarbons, and H2 obtained from torrefied biomass catalytic pyrolysis over biochar were up to 46 area%, 16 area%, and 27.02 vol%, respectively. These results indicated that torrefaction as pretreatment can greatly improve the quality of bio-oil and syngas in biomass pyrolysis and catalytic pyrolysis. Upgraded bio-oil was dominated by phenols (37.23 area%) and hydrocarbons (42.56 area%) at higher biochar catalyst loadings. The biochar catalyst may be as a cheap catalyst in biomass conversion and bio-oil upgrading. The two step-reaction model fits well for Douglas fir sawdust torrefaction with the activation energies of about 112 kJ/mol and 150 kJ/mol for the first and second reaction stages, respectively. Derivative thermogravimetric (DTG) curves showed that the shoulder of hemicelluloses decomposition in torrefied biomass pyrolysis was eliminated. The first-order one-step global model fitted well for the raw and torrefied biomass pyrolysis with the average activation energies in the range of 203.94-195.13 kJ/mol.
Download or read book Biomass Valorization written by Davide Ravelli and published by John Wiley & Sons. This book was released on 2021-07-19 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the potential of biomass-based chemicals with this comprehensive new reference from leading voices in the field With the depletion of fossil raw materials a readily ascertainable inevitability, the exploitation of biomass-based renewable derivatives becomes ever more practical and realistic. In Biomass Valorization: Sustainable Methods for the Production of Chemicals, accomplished researchers and authors Davide Ravelli and Chiara Samori deliver a thorough compilation of state-of-the-art techniques and most advanced strategies used to convert biomass into useful building blocks and commodity chemicals. Each chapter in this collection of insightful papers begins by detailing the core components of the described technology, along with a fulsome description of its advantages and limitations, before moving on to a discussion of recent advancements in the field. The discussions are grouped by the processed biomass, such as terrestrial biomass, aquatic biomass, and biomass-deriving waste. Readers will also benefit from the inclusion of: A thorough introduction to the role of biomass in the production of chemicals An exploration of biomass processing via acid, base and metal catalysis, as well as biocatalysis A practical discussion of biomass processing via pyrolysis and thermochemical-biological hybrid processes A concise treatment of biomass processing assisted by ultrasound and via electrochemical, photochemical and mechanochemical means Perfect for chemical engineers, catalytic chemists, biotechnologists, and polymer chemists, Biomass Valorization: Sustainable Methods for the Production of Chemicals will also earn a place in the libraries of environmental chemists and professionals working with organometallics and natural products chemists.
Download or read book Pyrolysis of Biomass for Fuels and Chemicals written by Akwasi A. Boateng and published by Academic Press. This book was released on 2020-05-27 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book The Role of Catalysis for the Sustainable Production of Bio fuels and Bio chemicals written by Kostas Triantafyllidis and published by Newnes. This book was released on 2013-03-19 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Role of Catalysis for the Sustainable Production of Bio-fuels and Bio-chemicals describes the importance of catalysis for the sustainable production of biofuels and biochemicals, focused primarily on the state-of-the-art catalysts and catalytic processes expected to play a decisive role in the "green" production of fuels and chemicals from biomass. In addition, the book includes general elements regarding the entire chain of biomass production, conversion, environment, economy, and life-cycle assessment. Very few books are available on catalysis in production schemes using biomass or its primary conversion products, such as bio-oil and lignin. This book fills that gap with detailed discussions of: - Catalytic pyrolysis of lignocellulosic biomass - Hybrid biogasoline by co-processing in FCC units - Fischer-Tropsch synthesis to biofuels (biomass-to-liquid process) - Steam reforming of bio-oils to hydrogen With energy prices rapidly rising, environmental concerns growing, and regulatory apparatus evolving, this book is a resource with tutorial, research, and technological value for chemists, chemical engineers, policymakers, and students. - Includes catalytic reaction mechanism schemes and gives a clear understanding of catalytic processes - Includes flow diagrams of bench-, pilot- and industrial-scale catalytic processing units and demonstrates the various process technologies involved, enabling easy selection of the best process - Incorporates many tables, enabling easy comparison of data based on a critical review of the available literature
Download or read book Reaction Pathways and Mechanisms in Thermocatalytic Biomass Conversion II written by Marcel Schlaf and published by Springer. This book was released on 2015-10-30 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume II presents the latest advances in catalytic hydrodeoxygenation and other transformations of some cellulosic platform chemicals to high value-added products. It presents the theoretical evaluation of the energetics and catalytic species involved in potential pathways of catalyzed carbohydrate conversion, pathways leading to the formation of humin-based by-products, and thermal pathways in deriving chemicals from lignin pyrolysis and hydrodeoxygenation. Catalytic gasification of biomass under extreme thermal conditions as an extension of pyrolysis is also discussed. Marcel Schlaf, PhD, is a Professor at the Department of Chemistry, University of Guelph, Canada. Z. Conrad Zhang, PhD, is a Professor at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China.
Download or read book Waste Biorefinery written by Thallada Bhaskar and published by Elsevier. This book was released on 2018-04-13 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waste Biorefinery: Potential and Perspectives offers data-based information on the most cutting-edge processes for the utilisation of biogenic waste to produce biofuels, energy products, and biochemicals – a critical aspect of biorefinery. The book explores recent developments in biochemical and thermo-chemical methods of conversion and the potential generated by different kinds of biomass in more decentralized biorefineries. Additionally, the book discusses the move from 200 years of raw fossil materials to renewable resources and how this shift is accompanied by fundamental changes in industrial manufacturing technologies (from chemistry to biochemistry) and in logistics and manufacturing concepts (from petrochemical refineries to biorefineries). Waste Biorefinery: Potential and Perspectives designs concepts that enable modern biorefineries to utilize all types of biogenic wastes, and to integrate processes that convert byproduct streams to high-value products, achieving higher cost benefits. This book is an essential resource for researchers and students studying biomass, biorefineries, and biofuels/products/processes, as well as chemists, biochemical/chemical engineers, microbiologists, and biotechnologists working in industries and government agencies. - Details the most advanced and innovative methods for biomass conversion - Covers biochemical and thermo-chemical processes as well as product development - Discusses the integration of technologies to produce bio-fuels, energy products, and biochemicals - Illustrates specific applications in numerous case studies for reference and teaching purposes
Download or read book Pyrolysis of Biomass written by Shurong Wang and published by Walter de Gruyter GmbH & Co KG. This book was released on 2016-12-05 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the development of societies fossil energy is no longer the only energy resource, and increasing attention had been paid to alternative energy. Biomass is considered to be one of the alternatives due to efficiency and low cost. This book presents biomass pyrolysis behavior for three main components: Cellulose, Hemicellulose and Lignin, and discusses the influence of mineral salts , zeolite catalysts and metal oxide on their pyrolysis.
Download or read book Solar Powered Catalytic Pyrolysis of Biomass for Producing Bio based Fuels and Chemicals written by Asif Hasan Rony and published by . This book was released on 2020 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar powered catalytic pyrolysis of waste biomass can pave the way for sustainable fuel and chemical feedstocks with a wide variety of industrial applications. A 5kW concentrating solar device was engineered to power the endothermic pyrolysis process. Furthermore, A condensing system was also developed to collect the produced bio-oil under inert nitrogen condition efficiently. The product distribution from the solar powered pyrolysis system is dependent on the solar flux intensity. The bio-oil produced was analyzed using a GC-MS. It was found that the presence of concentrated solar light can improve the phenolic concentration (up to 52% without any catalyst) of the tar products. Additionally, the feedstocks were analyzed for physical characterization to find the suitability of the material. The reaction kinetics and thermodynamics were studied by using Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa methods to estimate the activation energy, Gibbs energy, Arrhenius pre-exponential factor, enthalpy, and entropy. Among the tested kinetics models, the best fit model for the experimental data is 1-D diffusion one with an R2 value more than 0.94. After confirming the potential of the feed material for the solar biomass pyrolysis application, different catalysts (Fe2O3, Ca2Fe2O5, CaFeO4, CaFe2O6) at a ratio of 1:10 were tested to enhance solar biomass pyrolysis, especially for improvement in product quality, and quantity with a given period. Use of Ca2Fe2O5 can lead to the production of an oil containing as high as 60.1% phenol. The activation energy for the pyrolysis of the biomass due to the use of 9.1% catalyst was lowered from 160 kJ/mol to 92 kJ/mol. The same catalyst was utilized for cyclic tests. Each cycle consists of two steps - a catalytic biomass pyrolysis under concentrated solar light and regeneration of the used catalyst with steam at a temperature of 850 °C. The catalyst Ca2Fe2O5 was found to be stable during the 10-cycle tests, yielding phenolic rich tar during the pyrolysis and H2-rich syngas in the steam gasification-based regeneration step. The Ca2Fe2O5 based solar power biomass pyrolysis scheme illustrates a sustainable pathway for an environmentally friendly chemical feedstock production process.
