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Catalytic Deoxygenation Of Biomass Pyrolysis Vapors To Improve Bio Oil Stability
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Book Synopsis Catalytic Deoxygenation of Biomass Pyrolysis Vapors to Improve Bio-oil Stability by :
Download or read book Catalytic Deoxygenation of Biomass Pyrolysis Vapors to Improve Bio-oil Stability written by and published by . This book was released on 2016 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The President's Advanced Energy Initiative called for a change in the way Americans fuel their vehicles to promote improved energy security. Increasing biofuels production from domestic lignocellulosic resources requires advanced technology development to achieve the aggressive targets set forth to reduce motor gasoline consumption by 20% in ten years (by 2017). The U.S. Department of Energy (USDOE) Office of the Biomass Program (currently Bioenergy Technologies Office) is actively funding research and development in both biochemical and thermochemical conversion technologies to accelerate the deployment of biofuels technologies in the near future to meet the goals of the Advanced Energy Initiative. Thermochemical conversion technology options include both gasification and pyrolysis to enable the developing lignocellulosic biorefineries and maximize biomass resource utilization for production of biofuels.
Book Synopsis Chemical Catalysts for Biomass Upgrading by : Mark Crocker
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.
Book Synopsis Pyrolysis Vapor and Bio-Oil Preconditioning via Ex Situ Hydrodeoxygenation and Alkylation Using a Heteropolyacid Catalyst by :
Download or read book Pyrolysis Vapor and Bio-Oil Preconditioning via Ex Situ Hydrodeoxygenation and Alkylation Using a Heteropolyacid Catalyst written by and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ex situ catalytic preconditioning of biomass pyrolysis vapors (partial deoxygenation) has the potential for both reducing the oxygen content and beneficially influencing the oxygen speciation of condense bio-oils for enhancement of downstream condensed phase upgrading processes. Here, condensed phase upgrading processes may refer to both coprocessing and hydroprocessing with vacuum gas-oil (VGO). Reduction of oxygen content to produce bio-oils with greater hydrophobicity can enhance VGO-solubility while tailoring of oxygen speciation by removal of reactive carbonyls (e.g., acetic acid) can lessen catalytic deactivation via coking reactions. 1,2 Furthermore, enhanced VGO-solubility and reduced coking leads to greater biogenic carbon incorporation in end-products from condensed phase upgrading processes. By leveraging the hydrodeoxygenation and alkylation activity of a titania-supported molybdenum-heteropolyacid (Mo-HPA/TiO2) catalyst, pyrolysis vapors and resulting condensed bio-oils were effectively preconditioned for downstream upgrading. 3 Data regarding the use of Mo-HPA/TiO2 for pyrolysis vapor preconditioning will be presented on, including method of employment, catalyst characterization, and impacts on bio-oil in relation to downstream condensed phase upgrading processes. Our approach is to: Compare Mo-HPA/TiO2 product distribution to HZSM-5; Investigate Mo-HPA/TiO2 regeneration and characterize changes in acid site character; Assess product differences in terms of enhanced VGO-solubility.
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 2017-06-30 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 Pyrolysis Oils by : Tushar P. Vispute
Download or read book Pyrolysis Oils written by Tushar P. Vispute and published by . This book was released on 2011 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing need to develop the processes to produce renewable fuels and chemicals due to the economical, political, and environmental concerns associated with the fossil fuels. One of the most promising methods for a small scale conversion of biomass into liquid fuels is fast pyrolysis. The liquid product obtained from the fast pyrolysis of biomass is called pyrolysis oil or bio-oil. It is a complex mixture of more than 300 compounds resulting from the depolymerization of biomass building blocks, cellulose; hemi-cellulose; and lignin. Bio-oils have low heating value, high moisture content, are acidic, contain solid char particles, are incompatible with existing petroleum based fuels, are thermally unstable, and degrade with time. They cannot be used directly in a diesel or a gasoline internal combustion engine. One of the challenges with the bio-oil is that it is unstable and can phase separate when stored for long. Its viscosity and molecular weight increases with time. It is important to identify the factors responsible for the bio-oil instability and to stabilize the bio-oil. The stability analysis of the bio-oil showed that the high molecular weight lignin oligomers in the bio-oil are mainly responsible for the instability of bio-oil. The viscosity increase in the bio-oil was due to two reasons: increase in the average molecular weight and increase in the concentration of high molecular weight oligomers. Char can be removed from the bio-oil by microfiltration using ceramic membranes with pore sizes less than 1 [mu meter]. Removal of char does not affect the bio-oil stability but is desired as char can cause difficulty in further processing of the bio-oil. Nanofiltration and low temperature hydrogenation were found to be the promising techniques to stabilize the bio-oil. Bio-oil must be catalytically converted into fuels and chemicals if it is to be used as a feedstock to make renewable fuels and chemicals. The water soluble fraction of bio-oil (WSBO) was found to contain C2 to C6 oxygenated hydrocarbons with various functionalities. In this study we showed that both hydrogen and alkanes can be produced with high yields from WSBO using aqueous phase processing. Hydrogen was produced by aqueous phase reforming over Pt/Al2O3 catalyst. Alkanes were produced by hydrodeoxygenation over Pt/SiO2-Al2O3. Both of these processes were preceded by a low temperature hydrogenation step over Ru/C catalyst. This step was critical to achieve high yields of hydrogen and alkanes. WSBO was also converted to gasoline-range alcohols and C2 to C6 diols with up to 46% carbon yield by a two-stage hydrogenation process over Ru/C catalyst (125 °C) followed by over Pt/C (250 °C) catalyst. Temperature and pressure can be used to tune the product selectivity. The hydroprocessing of bio-oil was followed by zeolite upgrading to produce C6 to C8 aromatic hydrocarbons and C2 to C4 olefins. Up to 70% carbon yield to aromatics and olefins was achieved from the hydrogenated aqueous fraction of bio-oil. The hydroprocessing steps prior to the zeolite upgrading increases the thermal stability of bio-oil as well as the intrinsic hydrogen content. Increasing the thermal stability of bio-oil results in reduced coke yields in zeolite upgrading, whereas, increasing the intrinsic hydrogen content results in more oxygen being removed from bio-oil as H2O than CO and CO2. This results in higher carbon yields to aromatic hydrocarbon and olefins. Integrating hydroprocessing with zeolite upgrading produces a narrow product spectrum and reduces the hydrogen requirement of the process as compared to processes solely based on hydrotreating. Increasing the yield of petrochemical products from biomass therefore requires hydrogen, thus cost of hydrogen dictates the maximum economic potential of the process.
Book Synopsis New and Future Developments in Catalysis by : Li Li
Download or read book New and Future Developments in Catalysis written by Li Li and published by Elsevier Inc. Chapters. This book was released on 2013-07-17 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biokerosene written by Martin Kaltschmitt and published by Springer. This book was released on 2017-08-09 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed overview of aspects related to the overall provision chain for biokerosene as part of the global civil aviation business. Starting with a review of the current market situation for aviation fuels and airplanes and their demands, it then presents in-depth descriptions of classical and especially new types of non-edible biomass feedstock suitable for biokerosene provision. Subsequent chapters discuss those fuel provision processes that are already available and those still under development based on various biomass feedstock materials, and present e.g. an overview of the current state of the art in the production of a liquid biomass-based fuel fulfilling the specifications for kerosene. Further, given the growing interest of the aviation industry and airlines in biofuels for aviation, the experiences of an air-carrier are presented. In closing, the book provides a market outlook for biokerosene. Addressing a broad range of aspects related to the pros and cons of biokerosene as a renewable fuel for aviation, the book offers a unique resource.
Book Synopsis Catalysis for Renewables by : Gabriele Centi
Download or read book Catalysis for Renewables written by Gabriele Centi and published by John Wiley & Sons. This book was released on 2008-01-08 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its focus on catalysis and addressing two very hot and timely topics with significant implications for our future lives, this will be a white book in the field. The authority behind this practical work is the IDECAT Network of Excellence, and the authors here outline how the use of catalysis will promote the more extensive use of renewable feedstocks in chemical and energy production. They present the latest applications, their applicability and results, making this a ready reference for researchers and engineers working in catalysis, chemistry, and industrial processes wishing to analyze options, outlooks and opportunities in the field.
Book Synopsis Upgrading of Pyrolysis Bio-oil to Renewable Fuels by Hydrodeoxygenation by : Yinglei Han
Download or read book Upgrading of Pyrolysis Bio-oil to Renewable Fuels by Hydrodeoxygenation written by Yinglei Han and published by . This book was released on 2014 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast pyrolysis is a process can convert woody biomass to a crude bio-oil (pyrolysis oil). However, some of these compounds contribute to bio-oil shelf life instability and difficulty in refining. Catalytic hydrodeoxygenation (HDO) of the bio-oil can upgrade the bio-oil into transportation fuels. Therefore, nickel (Ni) and ruthenium (Ru) catalysts supporting on a novel nanomaterial, silica nanospring (NS) showed the best performance for HDO of phenol. In terms of bio-oil hydrotreatment, the bio-oil was fractionated by phase separation by addition of water to obtain a water-insoluble (WIS) and water-soluble (WS) fractions from the bio-oil. The WS of bio-oil can be upgraded into cycloalkanes of 30% wt. and alcohols of 18% wt. over Ni(65%)/SiO2-Al2 O3 catalyst. The WIS of bio-oil had been effectively cracked in methanol over Ni(65%)/SiO2-Al2 O3 catalyst. A further step of HDO on the cracked oil had successfully deoxygenated the phenolics into cycloalkanes.
Book Synopsis Pyrolysis of Biomass by : Shurong Wang
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 445 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.
Book Synopsis In-situ Catalytic Upgrading of Pyrolysis Vapor by :
Download or read book In-situ Catalytic Upgrading of Pyrolysis Vapor written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rising fuel prices, environmental concerns over the emission of greenhouse gases, and the limited availability of fossil fuels led to the current focus on developing alternative fuel sources that are sustainable and environmentally benign. Lignocellulosic biomass, due to its high carbon value, abundance and for being greenhouse gas neutral, is a promising alternative energy resource. Fast pyrolysis of lignocellulosic biomass produces high energy density liquid fuel, called bio-oil, which has the potential as transportation fuel. But, crude bio-oils are chemically complex liquids with high oxygen contents (40 % oxygen content), high viscosity, low pH, low thermal stability, and poor heating values (20 MJ/Kg). Therefore, bio-oils must be substantially upgraded (de-oxygenated) to highly stable, non-corrosive, and high calorific value liquid fuels prior to their use as transportation fuels. This research was conducted to investigate the efficiency of various acid catalysts in upgrading (cracking) the oxygenated pine wood pyrolysis vapors to high quality liquid fuel. Initial catalyst screening studies proved that zeolite acidity and pore structure is essential for effective cracking of pyrolysis vapors. Low space velocities and moderate temperatures were found to be favorable for the deoxygenation of pyrolysis vapors. Various zeolites were tested, of which HZSM-5 with low Si/Al ratio was found to be an effective cracking catalyst. But the use of zeolites resulted in poor liquid yields. Zeolites were promoted with transition metal ions in order to inhibit the secondary cracking reactions occurring on Brönsted acid sites. The meta--promoted bi-functional catalysts were found to be the most effective catalysts, among all the catalysts employed in this research, in promoting hydrocarbon forming reactions without adversely affecting the liquid yields. Catalyst coking was unavoidable but the addition of metal ions to zeolites lowered the extent of coking. TG analysis of used catalysts indicated that the catalysts can be regenerated by calcining at 600-650 °C.
Book Synopsis Pyrolysis of Biomass for Fuels and Chemicals by : Akwasi A. Boateng
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
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.
Book Synopsis Thermochemical Processing of Biomass by : Robert C. Brown
Download or read book Thermochemical Processing of Biomass written by Robert C. Brown and published by John Wiley & Sons. This book was released on 2019-05-28 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive examination of the large number of possible pathways for converting biomass into fuels and power through thermochemical processes Bringing together a widely scattered body of information into a single volume, this book provides complete coverage of the many ways that thermochemical processes are used to transform biomass into fuels, chemicals and power. Fully revised and updated, this new edition highlights the substantial progress and recent developments that have been made in this rapidly growing field since publication of the first edition and incorporates up-to-date information in each chapter. Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power, 2nd Edition incorporates two new chapters covering: condensed phased reactions of thermal deconstruction of biomass and life cycle analysis of thermochemical processing systems. It offers a new introductory chapter that provides a more comprehensive overview of thermochemical technologies. The book also features fresh perspectives from new authors covering such evolving areas as solvent liquefaction and hybrid processing. Other chapters cover combustion, gasification, fast pyrolysis, upgrading of syngas and bio-oil to liquid transportation fuels, and the economics of thermochemically producing fuels and power, and more. Features contributions by a distinguished group of European and American researchers offering a broad and unified description of thermochemical processing options for biomass Combines an overview of the current status of thermochemical biomass conversion as well as engineering aspects to appeal to the broadest audience Edited by one of Biofuels Digest’s "Top 100 People" in bioenergy for six consecutive years Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power, 2nd Edition will appeal to all academic researchers, process chemists, and engineers working in the field of biomass conversion to fuels and chemicals. It is also an excellent book for graduate and advanced undergraduate students studying biomass, biofuels, renewable resources, and energy and power generation.
Book Synopsis Catalytic Pyrolysis of Pinewood for Improving Hydrocarbon Yield and Oil Stability Using Low-cost Metal-supported Catalysts by : Angelika S. Quedraogo
Download or read book Catalytic Pyrolysis of Pinewood for Improving Hydrocarbon Yield and Oil Stability Using Low-cost Metal-supported Catalysts written by Angelika S. Quedraogo and published by . This book was released on 2020 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: The objectives of this research are to develop low-cost metal-supported catalysts to improve the hydrocarbon yield in the bio-oil and to reduce the undesired compounds such as aldehydes, ketones, and acids. In this study, a fixed bed reactor was constructed using a stainless steel pipe, a split furnace, and an ice bath condenser for the catalytic pyrolysis of pine sawdust. A low-cost metal-supported catalyst has been developed and characterized using SEM, EDS, and BET analysis methods. In addition, the effects of temperature and catalyst type on the yield and quality of the pyrolysis bio-oil were investigated. The experiment was carried out at 400, 500, and 600°C at 1 atmosphere in the presence of 100 mL/min nitrogen without a catalyst, over HZSM-5 or Ni/HZSM-5. Prior to the pyrolysis, the pine sawdust was sized using a 1.18 mm sieve and dried for 24 hours at 105°C in an oven. The feedstock’s ultimate and proximate analyses were completed using a CHNS-O analyzer, a thermogravimetric analyzer, and a furnace. The output products collected were bio-oil, biochar, and syngas. The bio-oil was collected by condensation and analyzed using Gas Chromatography and Mass Spectrometry (GCMS). The non-catalytic pyrolysis had a high yield (37.44w.%) at 500°C; however, HZSM-5 and Ni/HZSM-5 had a similar amount of bio-oil (36.601 and 35.341 wt.%, respectively) at 400°C. The presence of catalysts has improved the bio-oil viscosity by producing more than 90% of light bio-oil and approximately ≤ 10% of heavy bio-oil. The qualitative analysis is categorized into two subgroups of compounds. The first subgroup was constituted of desired compounds such as hydrocarbons, alcohols, phenols, and derived phenol compounds. The other subgroup represents the undesired compounds such as aldehydes, ketones, and acids. The hydrocarbon content in the heavy bio-oil was relatively high, while alcohols, phenols and their derivatives constituted the major compounds in light bio-oils. The presence of Ni/HZSM-5 has increased the selectivity towards the desired compounds from 49.742% to 80.179% in heavy bio-oils and 34.945% to 56.270% in light bio-oils at 400°C.
Book Synopsis Fast Pyrolysis of an Agricultural Residue for Bio Energy Products by : Salman Raza Naqvi
Download or read book Fast Pyrolysis of an Agricultural Residue for Bio Energy Products written by Salman Raza Naqvi and published by LAP Lambert Academic Publishing. This book was released on 2020-07-22 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bio-energy products from agricultural biomass residue such as paddy husk is an attractive option due to its abundance in Malaysia. Thermo-chemical process such as fast pyrolysis shows a great potential for production of high quality bio-oil and bio-char production. A detailed experimentation and their results are presented for fast pyrolysis process chemistry, rectors used for fast pyrolysis process, catalytic application for upgrading the biomass pyrolysis vapors, zeolite based catalysts, deoxygenation mechanism and role of zeolite pore topology and acidity on biomass conversion. The research on one step high quality production of bio-oil and bio-char from agricultural residue is still explored completely. The book serves as a reference material for students, process engineers and scientists working in the area of bio-oil production and fast pyrolysis of biomass.
Book Synopsis Conceptual Process Design and Techno-economic Assessment of Ex Situ Catalytic Fast Pyrolysis of Biomass by :
Download or read book Conceptual Process Design and Techno-economic Assessment of Ex Situ Catalytic Fast Pyrolysis of Biomass written by and published by . This book was released on 2015 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ex situ catalytic fast pyrolysis of biomass is a promising route for the production of fungible liquid biofuels. There is significant ongoing research on the design and development of catalysts for this process. However, there are a limited number of studies investigating process configurations and their effects on biorefinery economics. Herein we present a conceptual process design with techno-economic assessment; it includes the production of upgraded bio-oil via fixed bed ex situ catalytic fast pyrolysis followed by final hydroprocessing to hydrocarbon fuel blendstocks. This study builds upon previous work using fluidized bed systems, as detailed in a recent design report led by the National Renewable Energy Laboratory (NREL/TP-5100-62455); overall yields are assumed to be similar, and are based on enabling future feasibility. Assuming similar yields provides a basis for easy comparison and for studying the impacts of areas of focus in this study, namely, fixed bed reactor configurations and their catalyst development requirements, and the impacts of an inline hot gas filter. A comparison with the fluidized bed system shows that there is potential for higher capital costs and lower catalyst costs in the fixed bed system, leading to comparable overall costs. The key catalyst requirement is to enable the effective transformation of highly oxygenated biomass into hydrocarbons products with properties suitable for blending into current fuels. Potential catalyst materials are discussed, along with their suitability for deoxygenation, hydrogenation and C-C coupling chemistry. This chemistry is necessary during pyrolysis vapor upgrading for improved bio-oil quality, which enables efficient downstream hydroprocessing; C-C coupling helps increase the proportion of diesel/jet fuel range product. One potential benefit of fixed bed upgrading over fluidized bed upgrading is catalyst flexibility, providing greater control over chemistry and product composition. Since this study is based on future projections, the impacts of uncertainties in the underlying assumptions are quantified via sensitivity analysis. As a result, this analysis indicates that catalyst researchers should prioritize by: carbon efficiency> catalyst cost> catalyst lifetime, after initially testing for basic operational feasibility.
