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Economic Analysis Of Ethanol Production From Biomass Using A Hybrid Thermal Biological Conversion Process
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Book Synopsis Economic Analysis of Ethanol Production from Biomass Using a Hybrid Thermal/biological Conversion Process by : Kim Sui So
Download or read book Economic Analysis of Ethanol Production from Biomass Using a Hybrid Thermal/biological Conversion Process written by Kim Sui So and published by . This book was released on 1998 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this case study is to examine the economics of ethanol production using the Waterloo Fast Pyrolysis process integrated with a fermentation step. The raw materials considered are wood and switchgrass. The pyrolytic ethanol process is evaluated in terms of capital costs, operating costs, and ethanol production costs for each type of feedstocks used. Sensitivity analyses are carried out to study the uncertainties of feedstock costs, ethanol production rates and ethanol yields on ethanol production costs. The economics of pyrolytic ethanol is compared to two other widely-known processes: simultaneous saccharification and fermentation, and dilute acid hydrolysis and fermentation. This analysis indicates that the pyrolytic ethanol process is comparable with the other two processes and suggests that it should be considered for further development.
Book Synopsis Economic Analysis of Ethanol Production from Switchgrass Using Hybrid Thermal by :
Download or read book Economic Analysis of Ethanol Production from Switchgrass Using Hybrid Thermal written by and published by . This book was released on 1998 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The economics of ethanol production from switchgrass using Waterloo fast pyrolysis with a fermentation step is investigated. Standard chemical engineering methods are used to estimate capital investment and operating costs. Order of magnitude method is employed for preliminary approximation of capital investment. The azeotropic ethanol production capacity used in this case study is 189 million liters/year (50 million gallons/year). All cost figures are updated to 1997 US $. Total capital investment is estimated to be $142 million, while the annual operating cost is about $118 million with an ethanol selling price of $0.62/l ($2.35/gal). This compares to $0.58/l ($2.20/gal) for ethanol from popular wood as determined in a previous study of the Waterloo fast pyrolysis process. Conservation of energy, especially, in the separation and purification steps, and generation of steam from lignin to meet energy requirements are evaluated in terms of energy saving costs. Additional steam has to be purchased, at $0.30 million/year, in order to meet the heat energy requirement of the process. Sensitivity analyses of feedstock cost and yield of sugar fermentation on the selling price of ethanol show that feedstock cost is positively related to ethanol selling price, while the yield has a negative relationship with selling price.
Book Synopsis Techno-economic Analysis for the Thermochemical Conversion of Lignocellulosic Biomass to Ethanol Via Acetic Acid Synthesis by :
Download or read book Techno-economic Analysis for the Thermochemical Conversion of Lignocellulosic Biomass to Ethanol Via Acetic Acid Synthesis written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomass is a renewable energy resource that can be converted into liquid fuel suitable for transportation applications. As a widely available biomass form, lignocellulosic biomass can have a major impact on domestic transportation fuel supplies and thus help meet the Energy Independence and Security Act renewable energy goals (U.S. Congress 2007). This study performs a techno-economic analysis of the thermo chemical conversion of biomass to ethanol, through methanol and acetic acid, followed by hydrogenation of acetic acid to ethanol. The conversion of syngas to methanol and methanol to acetic acid are well-proven technologies with high conversions and yields. This study was undertaken to determine if this highly selective route to ethanol could provide an already established economically attractive route to ethanol. The feedstock was assumed to be wood chips at 2000 metric ton/day (dry basis). Two types of gasification technologies were evaluated: an indirectly-heated gasifier and a directly-heated oxygen-blown gasifier. Process models were developed and a cost analysis was performed. The carbon monoxide used for acetic acid synthesis from methanol and the hydrogen used for hydrogenation were assumed to be purchased and not derived from the gasifier. Analysis results show that ethanol selling prices are estimated to be $2.79/gallon and $2.81/gallon for the indirectly-heated gasifier and the directly-heated gasifier systems, respectively (1stQ 2008$, 10% ROI). These costs are above the ethanol market price for during the same time period ($1.50 - $2.50/gal). The co-production of acetic acid greatly improves the process economics as shown in the figure below. Here, 20% of the acetic acid is diverted from ethanol production and assumed to be sold as a co-product at the prevailing market prices ($0.40 - $0.60/lb acetic acid), resulting in competitive ethanol production costs.
Book Synopsis Biochemical Conversion of Lignocellulosic Biomass to Ethanol by : Deepak Kumar
Download or read book Biochemical Conversion of Lignocellulosic Biomass to Ethanol written by Deepak Kumar and published by . This book was released on 2014 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ethanol production from lignocellulosic feedstock has been under intense scrutiny as a transportation fuel due to its potential to address concerns of increasing energy consumption, limited fossil energy resources, climate changes due to greenhouse gas emissions from fossil fuels, and especially use of non-food biomaterials, which address the biggest limitation of first generation bioethanol. Despite these advantages, the lignocellulosic ethanol production on commercial scale is still on verge because of high processing costs of ethanol production. In the biochemical conversion process, biomass is converted to ethanol by sequential steps of pretreatment (to reduce the recalcitrance of biomass), hydrolysis (conversion of sugar polymers to monomers) and fermentation (sugars to ethanol). Every year, about a million ton of grass straw is available as agricultural residue in Pacific Northwest. There were no previous comprehensive studies to evaluate the technical feasibility, economic viability and environmental sustainability of the bioethanol produced using grass straw in Willamette valley. The focus of this dissertation was to investigate the potential of cellulosic ethanol production from grass straw, assess the techno-economic viability and environmental impacts of the bioethanol production and development of a stochastic molecular model for modeling cellulose hydrolysis. This dissertation was divided into four studies focused on individual aspects of the overall objective. The first study evaluated the ethanol production potential from straws produced from three major grass seed varieties (perennial ryegrass (Lolium perenne L.), tall fescue (Festuca arundinacea Schreb) and bentgrass (Agrostis sp.)) in Pacific Northwest. Feedstocks were pretreated using three chemical pretreatments (dilute acid, dilute alkali, and hot water) and subsequently hydrolyzed enzymatically to investigate the effect of pretreatment and estimate the potential ethanol yields. Carbohydrate content in biomass varied from 40.6 to 52.9%, with tall fescue having the maximum cellulose content of 32.4%. All pretreatment were effective in increasing the hydrolysis yields, and theoretical maximum ethanol yields were in the range of 276 to 360 L per ton of biomass. The second study performed the comprehensive techno-economic analysis of ethanol production from tall fescue using dilute acid, dilute alkali, hot water, and steam explosion pretreatment technologies. Detailed process models incorporating all unit operations in lignocellulosic ethanol plant with 250,000 metric ton biomass/ year processing capacity were developed in SuperPro Designer. The ethanol production cost were estimated from $0.81 to $0.88/ L of ethanol, and were found highly sensitive to biomass price, enzyme cost, and pentose sugar fermentation efficiency. Energy from lignin residue burning was found sufficient to meet the steam requirement in the production process. Third study performed the life cycle assessment for bioethanol production from grass straw considering various pretreatment technology options. The study revealed that ethanol production from grass straw provide environmental benefits compared to use of gasoline, with 57.43-112.67% reduction in fossil energy use to produce 10,000 MJ of fuel. The GHG emissions during life cycle of ethanol production were estimated in the range of -131 to -555.4 kg CO2 eq. per 10,000 MJ of fuel. It was observed that assumptions and allocation procedure used during the analysis had a significant effect on the LCA results. During the techno-economic assessment of bioethanol process, it was found that cost of cellulose enzymes was significant fraction of the total ethanol production cost. A comprehensive enzymatic hydrolysis model can play critical role in optimizing the enzyme composition and dosage, improving understanding of the process mechanism and reducing the cost of enzymes, a major bottleneck in the ethanol production process. A novel approach of stochastic molecular modeling, in which each hydrolysis event is translated into a discrete event, was used to develop a mechanistic model for cellulose hydrolysis in the fourth study. Cellulose structure was modeled as a group of microfibrils consisting of elementary fibrils bundles, where each elementary fibril was represented as a three dimensional matrix of glucose molecules. Major structural properties: crystallinity, degree of polymerization, surface accessibility, and enzyme characteristics: mode of action, binding and surface blockage, inhibition, along with the dynamic morphological changes in structure of cellulose were incorporated in the model. Hydrolysis of cellulose was simulated based on Monte Carlo simulation technique. Hydrolysis results predicted by model simulations had shown a good fit with the experimental data from hydrolysis of pure cellulose using purified enzymes for various hydrolysis conditions. The model was effective in capturing the dynamic behavior of cellulose hydrolysis during action of individual as well as multiple cellulases. Model was able to simulate and validate all the important expected experimental observations: effect of structural properties, enzyme inhibition and enzyme loadings on the hydrolysis and degree of synergism on different substrates. The work from this dissertation proved the significance of choosing technology options, drew a comparison among different pretreatment technologies, identified the critical processes and inputs that have significant effect on the ethanol production cost, net energy, and GHG emissions. Results from the last study confirmed the validity of using the stochastic molecular modeling approach to quantitatively and qualitatively describe the cellulose hydrolysis, which has wide potential application in bioethanol production research to reduce the enzyme cost.
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 Energy Research Abstracts written by and published by . This book was released on 1986 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master's Theses Directories written by and published by . This book was released on 1999 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Download or read book Fossil Energy Update written by and published by . This book was released on 1981 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Biorefineries by : Paul R. Stuart
Download or read book Integrated Biorefineries written by Paul R. Stuart and published by CRC Press. This book was released on 2012-12-10 with total page 873 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated Biorefineries: Design, Analysis, and Optimization examines how to create a competitive edge in biorefinery innovation through integration into existing processes and infrastructure. Leading experts from around the world working in design, synthesis, and optimization of integrated biorefineries present the various aspects of this complex
Book Synopsis Progressive Thermochemical Biorefining Technologies by : Sonil Nanda
Download or read book Progressive Thermochemical Biorefining Technologies written by Sonil Nanda and published by CRC Press. This book was released on 2021-09-01 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considering the deleterious impacts of fossil fuels on the environmental and natural ecosystems, it has become imperative to make a paradigm shift toward renewable fuels, chemicals, and materials. The exhaustive everyday usage of fossil fuels and processed petrochemical products are the leading causes for the increase in greenhouse gas emissions, global warming, climate changes, acid rain, ozone layer depletion, pollution of air, water, and soil as well as for the accumulation of nonbiodegradable materials in the soil and oceans. On the contrary, biofuels, biochemicals, and biomaterials derived from renewable wastes such as nonedible plant biomass (e.g., agricultural and forestry biomass), energy crops, microalgae, municipal solid waste, sewage sludge, and other biogenic residues seem to be carbon neutral. Therefore, the global interest in biorefining technologies, especially thermochemical and biological conversion processes, is gaining momentum in academic and industrial perspectives. Progressive Thermochemical Biorefining Technologies offers all-inclusive coverage of the most crucial topics as follows: State-of-the-art information on the production and utilization of biofuels through thermochemical biorefining technologies Conversion of waste biomass through pyrolysis, liquefaction, torrefaction, carbonization, gasification, reforming, and other clean technologies Waste-to-energy/chemical generation Fuel upgrading technologies Techno-economic analysis and life-cycle assessment of biorefining processes Specifically designed to be instantly applicable, this volume serves as a reference book for undergraduate and graduate students, scientific investigators, and research scholars working in the areas relating to energy and fuels.
Book Synopsis Hybrid Poly-generation Energy Systems by : Mehdi Mehrpooya
Download or read book Hybrid Poly-generation Energy Systems written by Mehdi Mehrpooya and published by Elsevier. This book was released on 2023-09-21 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid Poly-generation Energy Systems: Thermal Design and Exergy Analysis provides an analysis of the latest technologies and concepts of hybrid energy systems, focusing on thermal applications. The book guides readers through an introduction to hybrid poly-generation systems and the storage options available before working through the types of hybrid systems, including solar, fuel cells, combustion, and heating and cooling. An analysis of the economic and environmental impact of each system is included, as well as methods and approaches for exergy and energy improvement analysis. This book can be used as a tool for understanding new concepts in this emerging field and as a reference for researchers and professionals working on the integrated cogeneration of power systems. Guides the reader through hybrid processes they can apply to their own system designs Explains operational processes and includes multiple examples of optimization techniques Includes renewable energy sources, CO2 capturing processes in combined systems and advanced exergy analysis methods
Book Synopsis Fractionation of Biomass Via Sequential Hydrothermal Liquefaction to Produce Value-Added Products and Techno-Economic Analysis by : Xiangyu Gu
Download or read book Fractionation of Biomass Via Sequential Hydrothermal Liquefaction to Produce Value-Added Products and Techno-Economic Analysis written by Xiangyu Gu and published by . This book was released on 2020 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrothermal liquefaction (HTL) is considered to be a promising technology for biomass conversion. The main advantages of HTL include accepting wet feedstock, operating under moderate temperature and pressure conditions, and having high production yield and conversion efficiency. This work consists of both experimental investigations and techno-economic analysis (TEA) of a two-stage sequential hydrothermal liquefaction (SeqHTL) process as an alternative HTL design for treating various types of biomass. Processing algae was first studied. A critical review on SeqHTL for converting algae was conducted compared to one-stage direct HTL (DHTL). Operating principles, reaction mechanisms, feasibilities, and advantages of SeqHTL for harvesting co-products were discussed. Next, a comparative TEA between SeqHTL and DHTL for algal biofuel production was performed. Results showed that milder operating conditions and the unique capability of co-product production led to reduced capital and operating costs for SeqHTL. A sensitivity analysis revealed that improving the yield of co-products reduced the biofuel cost. The next study was the HTL treatment of lignocellulose. The first stage of SeqHTL was used to pretreat the biomass at low temperatures to break the cell walls and release sugars. In the second stage, value-added products from sugars and lignin were produced at moderate temperatures. Results showed that SeqHTL achieved higher conversion yields than DHTL due to the pre-extraction of sugars. Various characterization techniques were used to measure the performance differences between SeqHTL and DHTL. Additionally, to overcome the barrier of low sugar recovery in the first stage due to the recalcitrance of the lignocelluloses, a pretreatment method prior to HTL using fungi enhanced with Mn addition was investigated. The pretreatment facilitated thermal decomposition reaction and enabled more sugar recovery. Finally, a TEA was performed on the extraction of bioactive compounds from potato peels via sequential hydrothermal extraction. This generated merits that provided economic results on the two-stage process. This work highlighted the fractionation feature of SeqHTL in comparison with DHTL when used to treat various biomasses. The research encompassed process chemistry, kinetics, design, and economics. Findings demonstrated that SeqHTL technology holds promise in processing various feedstocks for bio-chemical production, natural compounds extraction, and waste resources utilization.
Book Synopsis Process Design and Economics for Conversion of Lignocellulosic Biomass to Ethanol by :
Download or read book Process Design and Economics for Conversion of Lignocellulosic Biomass to Ethanol written by and published by . This book was released on 2011 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This design report describes an up-to-date benchmark thermochemical conversion process that incorporates the latest research from NREL and other sources. Building on a design report published in 2007, NREL and its subcontractor Harris Group Inc. performed a complete review of the process design and economic model for a biomass-to-ethanol process via indirect gasification. The conceptual design presented herein considers the economics of ethanol production, assuming the achievement of internal research targets for 2012 and nth-plant costs and financing.
Book Synopsis From Biomass to Bio-energy and Bio-chemicals: Pretreatment, Thermochemical Conversion, Biochemical Conversion and Its Bio-Based Applications by : Chao Zhao
Download or read book From Biomass to Bio-energy and Bio-chemicals: Pretreatment, Thermochemical Conversion, Biochemical Conversion and Its Bio-Based Applications written by Chao Zhao and published by Frontiers Media SA. This book was released on 2022-11-29 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aqueous Pretreatment of Plant Biomass for Biological and Chemical Conversion to Fuels and Chemicals by : Charles E. Wyman
Download or read book Aqueous Pretreatment of Plant Biomass for Biological and Chemical Conversion to Fuels and Chemicals written by Charles E. Wyman and published by John Wiley & Sons. This book was released on 2013-03-27 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant biomass is attracting increasing attention as a sustainable resource for large-scale production of renewable fuels and chemicals. However, in order to successfully compete with petroleum, it is vital that biomass conversion processes are designed to minimize costs and maximize yields. Advances in pretreatment technology are critical in order to develop high-yielding, cost-competitive routes to renewable fuels and chemicals. Aqueous Pretreatment of Plant Biomass for Biological and Chemical Conversion to Fuels and Chemicals presents a comprehensive overview of the currently available aqueous pretreatment technologies for cellulosic biomass, highlighting the fundamental chemistry and biology of each method, key attributes and limitations, and opportunities for future advances. Topics covered include: • The importance of biomass conversion to fuels • The role of pretreatment in biological and chemical conversion of biomass • Composition and structure of biomass, and recalcitrance to conversion • Fundamentals of biomass pretreatment at low, neutral and high pH • Ionic liquid and organosolv pretreatments to fractionate biomass • Comparative data for application of leading pretreatments and effect of enzyme formulations • Physical and chemical features of pretreated biomass • Economics of pretreatment for biological processing • Methods of analysis and enzymatic conversion of biomass streams • Experimental pretreatment systems from multiwell plates to pilot plant operations This comprehensive reference book provides an authoritative source of information on the pretreatment of cellulosic biomass to aid those experienced in the field to access the most current information on the topic. It will also be invaluable to those entering the growing field of biomass conversion.
Book Synopsis Energy Abstracts for Policy Analysis by :
Download or read book Energy Abstracts for Policy Analysis written by and published by . This book was released on 1986 with total page 1438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Energy Update written by and published by . This book was released on 1983 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
