National Library of Energy BETA

Sample records for biofuels product ethanol

  1. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J.L.

    2011-01-01

    Biofuel alternatives to ethanol: pumping the microbialtechnologies that enable biofuel production. Decades of workstrategy for producing biofuel. Although ethanol currently

  2. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    2007) Cellulosic ethanol: biofuel researchers prepare toBiofuel alternatives to ethanol: pumping the microbial welltechnologies that enable biofuel production. Decades of work

  3. Importance of systems biology in engineering microbes for biofuel production

    E-Print Network [OSTI]

    Mukhopadhyay, Aindrila

    2011-01-01

    TS, Steen E, Keasling JD: Biofuel Alternatives to ethanol:in engineering microbes for biofuel production Aindrila

  4. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    costs and benefits of biodiesel and ethanol biofuels. Proc.187 24 Fukuda, H. et al. (2001) Biodiesel fuel production by26 Chisti, Y. (2007) Biodiesel from microalgae. Biotechnol.

  5. Biofuel derived from Microalgae Corn-based Ethanol

    E-Print Network [OSTI]

    Blouin-Demers, Gabriel

    · E10 vs. E85 choice · Examined of corn-based ethanol fuel systems on the following: - environmentalBiofuel derived from Microalgae Corn-based Ethanol #12;Outline · Production processes for each;Definitions Biofuel: clean fuel made from animal and plant fats and tissues (Hollebone, 2008) Ethanol

  6. A model for improving microbial biofuel production using a synthetic feedback loop

    E-Print Network [OSTI]

    Dunlop, Mary J.; Keasling, Jay D.; Mukhopadhyay, Aindrila

    2010-01-01

    Steen E, Keasling JD (2008) Biofuel alternatives to ethanol:gene expression. Microbial biofuel production is one areaet al. 2008). Typical biofuel production processes start

  7. The in vitro characterization of heterologously expressed enzymes to inform in vivo biofuel production optimization

    E-Print Network [OSTI]

    Garcia, David Ernest

    2013-01-01

    enzymes to inform in vivo biofuel production optimization Byenzymes to inform in vivo biofuel production optimization byE & Keasling JD (2008) Biofuel alternatives to ethanol:

  8. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    technologies that enable biofuel production. Decades of workefficient systems for biofuel production. The current rangeprimary challenge in biofuel production is achieving yields

  9. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J.L.

    2011-01-01

    technologies that enable biofuel production. Decades of workefficient systems for biofuel production. The current rangeprimary challenge in biofuel production is achieving yields

  10. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    of biodiesel and ethanol biofuels. Proc. Natl. Acad. Sci. U.S. (2006) Bonkers about biofuels. Nat. Biotechnol. 24, 755–Schubert, C. (2006) Can biofuels finally take center stage?

  11. Assessments of biofuel sustainability: air pollution and health impacts

    E-Print Network [OSTI]

    Tsao, Chi-Chung

    2012-01-01

    Land clearing and the biofuel carbon debt. Science 2008,of reactive nitrogen during biofuel ethanol production.of reactive nitrogen during biofuel ethanol production.

  12. Thermodynamics of the Corn-Ethanol Biofuel Cycle

    E-Print Network [OSTI]

    Patzek, Tadeusz W.

    Thermodynamics of the Corn-Ethanol Biofuel Cycle Tad W. Patzek Department of Civil Sustainability & Renewability 28 1 Introduction 28 2 Disclaimer 28 #12;ii Thermodynamics of corn-ethanol biofuel. . . Web Version 3 Preliminaries 29 4 Laws of Thermodynamics 29 5 Thermodynamics and Economics 31 6

  13. Genes related to xylose fermentation and methods of using same for enhanced biofuel production

    DOE Patents [OSTI]

    Wohlbach, Dana J.; Gasch, Audrey P.

    2014-08-05

    The present invention provides isolated gene sequences involved in xylose fermentation and related recombinant yeast which are useful in methods of enhanced biofuel production, particularly ethanol production. Methods of bioengineering recombinant yeast useful for biofuel production are also provided.

  14. Guiding optimal biofuels : a comparative analysis of the biochemical production of ethanol and fatty acid ethyl esters from switchgrass.

    SciTech Connect (OSTI)

    Paap, Scott M.; West, Todd H.; Manley, Dawn Kataoka; Dibble, Dean C.; Simmons, Blake Alexander; Steen, Eric J.; Beller, Harry R.; Keasling, Jay D.; Chang, Shiyan

    2013-01-01

    In the current study, processes to produce either ethanol or a representative fatty acid ethyl ester (FAEE) via the fermentation of sugars liberated from lignocellulosic materials pretreated in acid or alkaline environments are analyzed in terms of economic and environmental metrics. Simplified process models are introduced and employed to estimate process performance, and Monte Carlo analyses were carried out to identify key sources of uncertainty and variability. We find that the near-term performance of processes to produce FAEE is significantly worse than that of ethanol production processes for all metrics considered, primarily due to poor fermentation yields and higher electricity demands for aerobic fermentation. In the longer term, the reduced cost and energy requirements of FAEE separation processes will be at least partially offset by inherent limitations in the relevant metabolic pathways that constrain the maximum yield potential of FAEE from biomass-derived sugars.

  15. The Effect of Ethanol on Fuel Price Behavior and the Viability of Cellulosic Biofuels

    E-Print Network [OSTI]

    Pennycook, Steve

    The Effect of Ethanol on Fuel Price Behavior and the Viability of Cellulosic Biofuels Jacob La's transport fuel in 2010 corn ethanol. #12;Biofuels in the US Biofuels have traditionally been used's transport sector energy from sugar cane. 9.4% of US's transport fuel in 2010 corn ethanol. In 2007, US

  16. A Prospective Target for Advanced Biofuel Production

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    A Prospective Target for Advanced Biofuel Production A Prospective Target for Advanced Biofuel Production Print Thursday, 02 February 2012 13:34 The sesquiterpene bisabolene was...

  17. An Update on Ethanol Production and Utilization in Thailand

    SciTech Connect (OSTI)

    Bloyd, Cary N.

    2009-10-01

    Thailand has continued to promote domestic biofuel utilization. Production and consumption of biofuel in Thailand have continued to increase at a fast rate due to aggressive policies of the Thai government in reducing foreign oil import and increasing domestic renewable energy utilization. This paper focuses on ethanol production and consumption, and the use of gasohol in Thailand. The paper is an update on the previous paper--Biofuel Infrastructure Development and Utilization in Thailand--in August 2008.

  18. Ethanol production from lignocellulose

    DOE Patents [OSTI]

    Ingram, Lonnie O. (Gainesville, FL); Wood, Brent E. (Gainesville, FL)

    2001-01-01

    This invention presents a method of improving enzymatic degradation of lignocellulose, as in the production of ethanol from lignocellulosic material, through the use of ultrasonic treatment. The invention shows that ultrasonic treatment reduces cellulase requirements by 1/3 to 1/2. With the cost of enzymes being a major problem in the cost-effective production of ethanol from lignocellulosic material, this invention presents a significant improvement over presently available methods.

  19. Plant and microbial research seeks biofuel production from lignocellulose

    E-Print Network [OSTI]

    Bartley, Laura E; Ronald, Pamela C

    2009-01-01

    sugar yields for biofuel production. Nat Biotechnol 25(7):research seeks biofuel production from lignocellulose A keylignocellulosic biofuel production and highlight scientific

  20. Can feedstock production for biofuels be sustainable in California?

    E-Print Network [OSTI]

    Kaffka, Stephen R.

    2009-01-01

    extent of po- tential biofuel production in California areglobal increases in biofuel production have raised ques-for sustainable biofuel production. This discussion has been

  1. High biofuel production of Botryococcus braunii using optimized cultivation strategies

    E-Print Network [OSTI]

    Yu, Wei

    2014-01-01

    release from agro-biofuel production negates global warmingcultivation and biofuel production (www.lyxia.com).engineering for biofuel production: towards affordable

  2. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J.L.

    2011-01-01

    ethanol and plant-based biodiesel ( Box 1). Although bio-acid pathway Currently, biodiesel production uses plant oilsbeen developed for use as biodiesel. However, if biodiesel

  3. Wastewater Reclamation and Biofuel Production Using Algae | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Wastewater Reclamation and Biofuel Production Using Algae Wastewater Reclamation and Biofuel Production Using Algae Breakout Session 2-A: The Future of Algae-Based Biofuels...

  4. Biofuels and bio-products derived from

    E-Print Network [OSTI]

    Ginzel, Matthew

    NEED Biofuels and bio- products derived from lignocellulosic biomass (plant materials) are part improve the energy and carbon efficiencies of biofuels production from a barrel of biomass using chemical and thermal catalytic mechanisms. The Center for Direct Catalytic Conversion of Biomass to Biofuels IMPACT

  5. Sustainable Production of Biofuels Rick Gustafson

    E-Print Network [OSTI]

    Brown, Sally

    Sustainable Production of Biofuels Rick Gustafson School of Environmental and Forest Sciences Electricity ­ co-product #12;Net emission #12;#12;ConclusionConclusion ·Regional Sustainable Biofuels Industry College of the Environment #12;Advanced Hardwood Biofuels Northwest http://ahb-nw.com/ #12;Sustainable

  6. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J.L.

    2011-01-01

    Conversion of biomass to biofuels has been the subject ofdiesel transport fuels with biofuels by 2010 [4]. Owing tobelieved that future biofuels will, by necessity, originate

  7. Supercritical carbon dioxide pretreatment of corn stover and switchgrass for lignocellulosic ethanol production

    E-Print Network [OSTI]

    Gu, Tingyue

    ethanol production Naveen Narayanaswamy a , Ahmed Faik b , Douglas J. Goetz a , Tingyue Gu a, a Department). Increased demand in biofuels cannot be met by the use of corn and sugarcane. In the US, corn ethanol has in and Liska, 2007). The production of lignocellulosic ethanol from biomass gener- ally involves four major

  8. Measuring and moderating the water resource impact of biofuel production and trade

    E-Print Network [OSTI]

    Fingerman, Kevin Robert

    2012-01-01

    sustainable  biofuel  production."  Ecotoxicology  Dimensions  in  Biofuel   Production.  Rome,  Italy,  UN  resource impact of biofuel production and trade By Kevin

  9. Environmental, economic, and energetic costs and benefits of biodiesel and ethanol biofuels

    E-Print Network [OSTI]

    Thomas, David D.

    Environmental, economic, and energetic costs and benefits of biodiesel and ethanol biofuels Jason- out reducing food supplies. We use these criteria to evaluate, through life-cycle accounting, ethanol from corn grain and biodie- sel from soybeans. Ethanol yields 25% more energy than the energy invested

  10. Ethanol production by Zymomonas mobilis

    SciTech Connect (OSTI)

    Strandberg, G.W.; Scott, C.D.; Donaldson, T.L.; Worden, R.M.

    1983-01-01

    Research progress is described on the development of laboratory-scale columnar bioreactors utilizing the flocculent bacterium, X. mobilis, for ethanol production. X. mobilis forms stable, ball-like aggregates which maintain structural integrity even when subjected to the high shear forces generated in the active 3-phase fluidized-bed reactors. Cell retention and ethanol production were studied using 3 bioreactor configurations. Ethanol productivity appeared to be primarily affected by glucose feed concentration. In addition, it was found that in the absence of nutrients, the level of ethanol productivity can be maintained for at least 1 h before a severe drop occurred. Ethanol inhibition is considered to be a limiting factor in ethanol production. (DMC)

  11. High biofuel production of Botryococcus braunii using optimized cultivation strategies

    E-Print Network [OSTI]

    Yu, Wei

    2014-01-01

    W. N2O release from agro-biofuel production negates globalcultivation and biofuel production (www.lyxia.com).183 (2001) Amin S. Review on biofuel oil and gas production

  12. Chromatin landscaping in algae reveals novel regulation pathway for biofuels production

    E-Print Network [OSTI]

    Ngan, Chew Yee

    2014-01-01

    regulation pathway for biofuels production Chew Yee Ngan ,regulation pathway for biofuels production Chew Yee Ngan,for the development of biofuels. Biofuels are produced from

  13. Conversion Technologies for Advanced Biofuels - Bio-Oil Production...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Oil Production Conversion Technologies for Advanced Biofuels - Bio-Oil Production RTI International report-out at the CTAB webinar on Conversion Technologies for Advanced Biofuels...

  14. Second-Generation Biofuels from Multi-Product Biorefineries Combine...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Second-Generation Biofuels from Multi-Product Biorefineries Combine Economic Sustainability With Environmental Sustainability Second-Generation Biofuels from Multi-Product...

  15. Single, Key Gene Discovery Could Streamline Production of Biofuels...

    Energy Savers [EERE]

    Single, Key Gene Discovery Could Streamline Production of Biofuels Single, Key Gene Discovery Could Streamline Production of Biofuels August 11, 2011 - 3:51pm Addthis WASHINGTON,...

  16. Biofuels are Helping Your Pocketbook and Our Environment

    SciTech Connect (OSTI)

    2009-10-28

    This fact sheet describes some of the financial and environmental benefits of biofuels and dispells myths about ethanol production.

  17. Defossiling Fuel: How Synthetic Biology Can Transform Biofuel Production

    E-Print Network [OSTI]

    Defossiling Fuel: How Synthetic Biology Can Transform Biofuel Production David F. Savage , Jeffrey through natural intermediates to final molecule is long, and biofuel production is perhaps the ultimate engineering, economic, political, and environmental realities. Are biofuels sustainable? Consider U

  18. Plant and microbial research seeks biofuel production from lignocellulose

    E-Print Network [OSTI]

    Bartley, Laura E; Ronald, Pamela C

    2009-01-01

    sugar yields for biofuel production. Nat Biotechnol 25(7):Plant and microbial research seeks biofuel production fromA key strategy for biofuel produc- tion is making use of the

  19. Measuring and moderating the water resource impact of biofuel production and trade

    E-Print Network [OSTI]

    Fingerman, Kevin Robert

    2012-01-01

    The  United  States'  Biofuel  Policies   and  Compliance  Water  Impacts  of  Biofuel  Extend  Beyond   Irrigation."  for  assessing  sustainable  biofuel  production."  

  20. Metabolomics of Clostridial Biofuel Production

    SciTech Connect (OSTI)

    Rabinowitz, Joshua D; Aristilde, Ludmilla; Amador-Noguez, Daniel

    2015-09-08

    Members of the genus Clostridium collectively have the ideal set of the metabolic capabilities for fermentative biofuel production: cellulose degradation, hydrogen production, and solvent excretion. No single organism, however, can effectively convert cellulose into biofuels. Here we developed, using metabolomics and isotope tracers, basic science knowledge of Clostridial metabolism of utility for future efforts to engineer such an organism. In glucose fermentation carried out by the biofuel producer Clostridium acetobutylicum, we observed a remarkably ordered series of metabolite concentration changes as the fermentation progressed from acidogenesis to solventogenesis. In general, high-energy compounds decreased while low-energy species increased during solventogenesis. These changes in metabolite concentrations were accompanied by large changes in intracellular metabolic fluxes, with pyruvate directed towards acetyl-CoA and solvents instead of oxaloacetate and amino acids. Thus, the solventogenic transition involves global remodeling of metabolism to redirect resources from biomass production into solvent production. In contrast to C. acetobutylicum, which is an avid fermenter, C. cellulolyticum metabolizes glucose only slowly. We find that glycolytic intermediate concentrations are radically different from fast fermenting organisms. Associated thermodynamic and isotope tracer analysis revealed that the full glycolytic pathway in C. cellulolyticum is reversible. This arises from changes in cofactor utilization for phosphofructokinase and an alternative pathway from phosphoenolpyruvate to pyruvate. The net effect is to increase the high-energy phosphate bond yield of glycolysis by 150% (from 2 to 5) at the expense of lower net flux. Thus, C. cellulolyticum prioritizes glycolytic energy efficiency over speed. Degradation of cellulose results in other sugars in addition to glucose. Simultaneous feeding of stable isotope-labeled glucose and unlabeled pentose sugars (xylose or arabinose) to C. acetobutylicum revealed that, as expected, glucose was preferred, with the pentose sugar selectively assimilated into the pentose phosphate pathway (PPP). Simultaneous feeding of xylose and arabinose revealed an unexpected hierarchy among these pentose sugars, with arabinose utilized preferentially over xylose. Pentose catabolism occurred via the phosphoketolase pathway (PKP), an alternative route of pentose catabolism that directly converts xylulose-5-phosphate into acetyl-phosphate and glyceraldehyde-3-phosphate. Taken collectively, these findings reveal two hierarchies in Clostridial pentose metabolism: xylose is subordinate to arabinose, and the PPP is used less than the PKP. Thus, in addition to massively expanding the available data on Clostridial metabolism, we identified three key regulatory points suitable for targeting in future bioengineering efforts: phosphofructokinase for enhancing fermentation, the pyruvate-oxaloacetate node for controlling solventogenesis, and the phosphoketolase reaction for driving pentose catabolism.

  1. Diagram of the Biofuel Production Process (SPORL -Alcohol Production):Introduction: The Northwest Advanced Renewables Alliance (NARA) is an organization

    E-Print Network [OSTI]

    Collins, Gary S.

    Pretreatment for Cellulosic Ethanol Production: Technology and Energy Consumption Evaluation." BioresourceDiagram of the Biofuel Production Process (SPORL - Alcohol Production):Introduction: The Northwest production industry in the Northwest United States. One of NARA's goals is to develop a production process

  2. Ethanol production in non-recombinant hosts

    DOE Patents [OSTI]

    Kim, Youngnyun; Shanmugam, Keelnatham; Ingram, Lonnie O.

    2013-06-18

    Non-recombinant bacteria that produce ethanol as the primary fermentation product, associated nucleic acids and polypeptides, methods for producing ethanol using the bacteria, and kits are disclosed.

  3. F.O. Licht's 17th Annual World Ethanol & Biofuels Conference

    Broader source: Energy.gov [DOE]

    The F.O. Licht's 17th Annual World Ethanol & Biofuels Conference will be held on November 3–6, 2014, in Budapest, Hungary. Valerie Reed, Deputy Director of the Bioenergy Technolgies Office will be serving on two panels: "Maintaining Next Generation Investments in the Years Ahead" on November 4 and "Putting Together a Constant Supply of Feedstocks for Advanced and Cellulosic Biofuels, Biochemicals and Aviation Fuels" on November 5.

  4. 2013 Survey of Non-Starch Ethanol and Renewable Hydrocarbon Biofuels Producers

    SciTech Connect (OSTI)

    Schwab, A.; Geiger, J.; Lewis, J.

    2015-01-01

    In order to understand the status of the industry for non-starch ethanol and renewable hydrocarbon biofuels as of the end of calendar year 2013, the National Renewable Energy Laboratory (NREL) conducted the first of what is anticipated to be an annual survey of U.S. non-starch ethanol and renewable hydrocarbon biofuels producers. This report presents the results of this initial survey and describes the survey methodology. Subsequent surveys will report on the progress over time of the development of these facilities and companies.

  5. Ethanol production method and system

    DOE Patents [OSTI]

    Chen, M.J.; Rathke, J.W.

    1983-05-26

    Ethanol is selectively produced from the reaction of methanol with carbon monoxide and hydrogen in the presence of a transition metal carbonyl catalyst. Methanol serves as a solvent and may be accompanied by a less volatile co-solvent. The solution includes the transition metal carbonyl catalysts and a basic metal salt such as an alkali metal or alkaline earth metal formate, carbonate or bicarbonate. A gas containing a high carbon monoxide to hydrogen ratio, as is present in a typical gasifer product, is contacted with the solution for the preferential production of ethanol with minimal water as a byproduct. Fractionation of the reaction solution provides substantially pure ethanol product and allows return of the catalysts for reuse.

  6. Versatile microbial surface-display for environmental remediation and biofuels production

    E-Print Network [OSTI]

    Hawkes, Daniel S

    2008-01-01

    engineering microbes for biofuels production. Science 315,xenobiotics remediation and biofuels production. TargetP. putida JS444 E. coli Biofuels Production Cellobiose

  7. Consolidated Bio-Processing of Cellulosic Biomass for Efficient Biofuel Production Using Yeast Consortium

    E-Print Network [OSTI]

    Goyal, Garima

    2011-01-01

    Biomass for Efficient Biofuel Production Using YeastBiomass for Efficient Biofuel Production Using YeastConsortium for efficient biofuel production: A New Candidate

  8. Structure and dynamics of the microbial communities underlying the carboxylate platform for biofuel production

    E-Print Network [OSTI]

    Hollister, E.B.

    2012-01-01

    carboxylate platform for biofuel production E.B. Hollisterbiomass conversion and biofuel production. Keywords: mixedbiomass conversion and biofuel production. Materials and

  9. Comparative genomics of xylose-fermenting fungi for enhanced biofuel production

    E-Print Network [OSTI]

    Wohlbach, Dana J.

    2011-01-01

    fermenting fungi for enhanced biofuel production Dana J.fermenting fungi for enhanced biofuel production Dana J.fermenting fungi for enhanced biofuel production Dana J.

  10. Consolidated Bio-Processing of Cellulosic Biomass for Efficient Biofuel Production Using Yeast Consortium

    E-Print Network [OSTI]

    Goyal, Garima

    2011-01-01

    for Efficient Biofuel Production Using Yeast Consortium Afor Efficient Biofuel Production Using Yeast Consortium byConsortium for efficient biofuel production: A New Candidate

  11. A model for improving microbial biofuel production using a synthetic feedback loop

    E-Print Network [OSTI]

    Dunlop, Mary

    2012-01-01

    for improving microbial biofuel production using a synthetica model for microbial biofuel production where a syntheticloop that limits biofuel production. These toxic effects may

  12. The in vitro characterization of heterologously expressed enzymes to inform in vivo biofuel production optimization

    E-Print Network [OSTI]

    Garcia, David Ernest

    2013-01-01

    to inform in vivo biofuel production optimization By Davidto inform in vivo biofuel production optimization by Davidability to increase biofuel production titers. Taking a step

  13. Manipulation of the Carbon Storage Regulator System for Metabolite Remodeling and Biofuel Production in Escherichia coli

    E-Print Network [OSTI]

    2012-01-01

    remodeling and biofuel production in Escherichia coli.JD: Advanced biofuel production in microbes. Biotechnol JJM, Gonzalez R: Biofuel production in Escherichia coli: the

  14. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    Hydrolysis and Biofuel Production. Industrial & EngineeringDegrade Lignocellulose for Biofuel Production A dissertationLignocellulose for Biofuel Production by Timothy David

  15. Metabolic engineering of microorganisms for biofuels production: from bugs to synthetic biology to fuels

    E-Print Network [OSTI]

    Kuk Lee, Sung

    2010-01-01

    economically viable biofuel production, all aspects of thesemany challenges on biofuel production [1,3 ,28-30]. Some ofhigh-flux reactions. Biofuel production efforts can benefit

  16. A model for improving microbial biofuel production using a synthetic feedback loop

    E-Print Network [OSTI]

    Dunlop, Mary J.; Keasling, Jay D.; Mukhopadhyay, Aindrila

    2010-01-01

    expression. Microbial biofuel production is one area whereal. 2008). Typical biofuel production processes start withwith uncertainty in the biofuel production rate. Our ?ndings

  17. Increase in ethanol yield via elimination of lactate production in an ethanol-tolerant mutant of Clostridium thermocellum

    SciTech Connect (OSTI)

    Biswas, Ranjita; Prabhu, Sandeep; Lynd, Lee R; Guss, Adam M

    2014-01-01

    Large-scale production of lignocellulosic biofuel is a potential solution to sustainably meet global energy needs. One-step consolidated bioprocessing (CBP) is a potentially advantageous approach for the production of biofuels, but requires an organism capable of hydrolyzing biomass to sugars and fermenting the sugars to ethanol at commercially viable titers and yields. Clostridium thermocellum, a thermophilic anaerobe, can ferment cellulosic biomass to ethanol and organic acids, but low yield, low titer, and ethanol sensitivity remain barriers to industrial production. Here, we deleted the hypoxanthine phosphoribosyltransferase gene in ethanol tolerant strain of C. thermocellum adhE*(EA) in order to allow use of previously developed gene deletion tools, then deleted lactate dehydrogenase (ldh) to redirect carbon flux towards ethanol. Upon deletion of ldh, the adhE*(EA) ldh strain produced 30% more ethanol than wild type on minimal medium. The adhE*(EA) ldh strain retained tolerance to 5% v/v ethanol, resulting in an ethanol tolerant platform strain of C. thermocellum for future metabolic engineering efforts.

  18. Ethanol production by recombinant hosts

    DOE Patents [OSTI]

    Fowler, David E. (Gainesville, FL); Horton, Philip G. (Gainesville, FL); Ben-Bassat, Arie (Gainesville, FL)

    1996-01-01

    Novel plasmids comprising genes which code for the alcohol dehydrogenase and pyruvate decarboxylase are described. Also described are recombinant hosts which have been transformed with genes coding for alcohol dehydrogenase and pyruvate. By virtue of their transformation with these genes, the recombinant hosts are capable of producing significant amounts of ethanol as a fermentation product. Also disclosed are methods for increasing the growth of recombinant hosts and methods for reducing the accumulation of undesirable metabolic products in the growth medium of these hosts. Also disclosed are recombinant host capable of producing significant amounts of ethanol as a fermentation product of oligosaccharides and plasmids comprising genes encoding polysaccharases, in addition to the genes described above which code for the alcohol dehydrogenase and pyruvate decarboxylase. Further, methods are described for producing ethanol from oligomeric feedstock using the recombinant hosts described above. Also provided is a method for enhancing the production of functional proteins in a recombinant host comprising overexpressing an adhB gene in the host. Further provided are process designs for fermenting oligosaccharide-containing biomass to ethanol.

  19. Ethanol production by recombinant hosts

    DOE Patents [OSTI]

    Ingram, Lonnie O. (Gainesville, FL); Beall, David S. (Gainesville, FL); Burchhardt, Gerhard F. H. (Gainesville, FL); Guimaraes, Walter V. (Vicosa, BR); Ohta, Kazuyoshi (Miyazaki, JP); Wood, Brent E. (Gainesville, FL); Shanmugam, Keelnatham T. (Gainesville, FL)

    1995-01-01

    Novel plasmids comprising genes which code for the alcohol dehydrogenase and pyruvate decarboxylase are described. Also described are recombinant hosts which have been transformed with genes coding for alcohol dehydrogenase and pyruvate. By virtue of their transformation with these genes, the recombinant hosts are capable of producing significant amounts of ethanol as a fermentation product. Also disclosed are methods for increasing the growth of recombinant hosts and methods for reducing the accumulation of undesirable metabolic products in the growth medium of these hosts. Also disclosed are recombinant host capable of producing significant amounts of ethanol as a fermentation product of oligosaccharides and plasmids comprising genes encoding polysaccharases, in addition to the genes described above which code for the alcohol dehydrogenase and pyruvate decarboxylase. Further, methods are described for producing ethanol from oligomeric feedstock using the recombinant hosts described above. Also provided is a method for enhancing the production of functional proteins in a recombinant host comprising overexpressing an adhB gene in the host. Further provided are process designs for fermenting oligosaccharide-containing biomass to ethanol.

  20. Ethanol production in recombinant hosts

    DOE Patents [OSTI]

    Ingram, Lonnie O'Neal; Barbosa-Alleyne, Maria D.

    2005-02-01

    The subject invention concerns the transformation of Gram-positive bacteria with heterologous genes which confer upon these microbes the ability to produce ethanol as a fermentation product. Specifically exemplified is the transformation of bacteria with genes, obtainable from Zymomonas mobilis, which encode pyruvate decarboxylase and alcohol dehydrogenase.

  1. Impacts of Climate Change on Biofuels Production

    SciTech Connect (OSTI)

    Melillo, Jerry M.

    2014-04-30

    The overall goal of this research project was to improve and use our biogeochemistry model, TEM, to simulate the effects of climate change and other environmental changes on the production of biofuel feedstocks. We used the improved version of TEM that is coupled with the economic model, EPPA, a part of MIT’s Earth System Model, to explore how alternative uses of land, including land for biofuels production, can help society meet proposed climate targets. During the course of this project, we have made refinements to TEM that include development of a more mechanistic plant module, with improved ecohydrology and consideration of plant-water relations, and a more detailed treatment of soil nitrogen dynamics, especially processes that add or remove nitrogen from ecosystems. We have documented our changes to TEM and used the model to explore the effects on production in land ecosystems, including changes in biofuels production.

  2. A model for improving microbial biofuel production using a synthetic feedback loop

    E-Print Network [OSTI]

    Dunlop, Mary

    2012-01-01

    for improving microbial biofuel production using a synthetica model for microbial biofuel production where a syntheticcell viability and biofuel yields. Although microbes can be

  3. Control and Optimization of Light Transfer in Photobioreactors Used for Biofuel Production

    E-Print Network [OSTI]

    Kandilian, Razmig

    2014-01-01

    sp. used for fixation and biofuel produc- tion”, Journal ofas feedstocks for biofuel production: per- spectives andPhotobioreactors Used for Biofuel Production A dissertation

  4. Manipulation of the Carbon Storage Regulator System for Metabolite Remodeling and Biofuel Production in Escherichia coli

    E-Print Network [OSTI]

    2012-01-01

    metabolite remodeling and biofuel production in Escherichiathrough engineered biofuel pathways. A) Overexpression ofPP, Keasling JD: Advanced biofuel production in microbes.

  5. Re-engineering bacteria for ethanol production

    DOE Patents [OSTI]

    Yomano, Lorraine P; York, Sean W; Zhou, Shengde; Shanmugam, Keelnatham; Ingram, Lonnie O

    2014-05-06

    The invention provides recombinant bacteria, which comprise a full complement of heterologous ethanol production genes. Expression of the full complement of heterologous ethanol production genes causes the recombinant bacteria to produce ethanol as the primary fermentation product when grown in mineral salts medium, without the addition of complex nutrients. Methods for producing the recombinant bacteria and methods for producing ethanol using the recombinant bacteria are also disclosed.

  6. RESEARCH ARTICLE A model for improving microbial biofuel production using

    E-Print Network [OSTI]

    Dunlop, Mary

    RESEARCH ARTICLE A model for improving microbial biofuel production using a synthetic feedback loop be compared. We propose a model for microbial biofuel production where a synthetic control system is used, the fuels are often toxic to cell growth, creating a negative feedback loop that limits biofuel production

  7. USDA Biofuels Strategic Production Report June 23, 2010

    E-Print Network [OSTI]

    USDA Biofuels Strategic Production Report June 23, 2010 1 A USDA Regional Roadmap to Meeting the field that can enhance various models for biofuel production, identify challenges and opportunities;USDA Biofuels Strategic Production Report June 23, 2010 2 Over the last 60 years, the percentage

  8. Innovative Breakthrough Demonstrated for Biological Ethanol Production...

    Broader source: Energy.gov (indexed) [DOE]

    nearly doubled bio-ethanol productivity, increased conversion yields, and minimized microbial contaminants. The process showed increased productivity and efficiency, therefore...

  9. Ethanol Demand in United States Gasoline Production

    SciTech Connect (OSTI)

    Hadder, G.R.

    1998-11-24

    The Oak Ridge National Laboratory (OWL) Refinery Yield Model (RYM) has been used to estimate the demand for ethanol in U.S. gasoline production in year 2010. Study cases examine ethanol demand with variations in world oil price, cost of competing oxygenate, ethanol value, and gasoline specifications. For combined-regions outside California summer ethanol demand is dominated by conventional gasoline (CG) because the premised share of reformulated gasoline (RFG) production is relatively low and because CG offers greater flexibility for blending high vapor pressure components like ethanol. Vapor pressure advantages disappear for winter CG, but total ethanol used in winter RFG remains low because of the low RFG production share. In California, relatively less ethanol is used in CG because the RFG production share is very high. During the winter in California, there is a significant increase in use of ethanol in RFG, as ethanol displaces lower-vapor-pressure ethers. Estimated U.S. ethanol demand is a function of the refiner value of ethanol. For example, ethanol demand for reference conditions in year 2010 is 2 billion gallons per year (BGY) at a refiner value of $1.00 per gallon (1996 dollars), and 9 BGY at a refiner value of $0.60 per gallon. Ethanol demand could be increased with higher oil prices, or by changes in gasoline specifications for oxygen content, sulfur content, emissions of volatile organic compounds (VOCS), and octane numbers.

  10. Biofuels and Transportation

    E-Print Network [OSTI]

    Minnesota, University of

    Biofuels and Transportation Impacts and Uncertainties Some Observations of a Reformed Ethanol and Logistics Symposium 3 Topics · Why Biofuels · Ethanol Economics · Ethanol Transportation Equipment Biofuels? · National Security · Reduce Imports of oil · Peak Oil · Replace Fossil Resources

  11. Metabolic engineering of microorganisms for biofuels production: from bugs to synthetic biology to fuels

    E-Print Network [OSTI]

    Kuk Lee, Sung

    2010-01-01

    of microbial hosts for biofuels production. Metab Eng 2008,delivers next-generation biofuels. Nat Biotechnol 27.furfural (HMF). Biotechnol Biofuels 2008, 1:12. 40. Trinh

  12. Global Biofuel Production and Food Security: Implications for Asia Pacific

    E-Print Network [OSTI]

    Global Biofuel Production and Food Security: Implications for Asia Pacific 56th AARES Annual Conference Fremantle, Western Australia 7-10 February 2012 William T. Coyle #12;Global Biofuel Production and Food Security: Making the Connection --Past analysis and the evidence about biofuels and spiking

  13. Metabolic Engineering of oleaginous yeast for the production of biofuels

    E-Print Network [OSTI]

    Tai, Mitchell

    2012-01-01

    The past few years have introduced a flurry of interest over renewable energy sources. Biofuels have gained attention as renewable alternatives to liquid transportation fuels. Microbial platforms for biofuel production ...

  14. A Realistic Technology and Engineering Assessment of Algae Biofuel Production

    E-Print Network [OSTI]

    Quinn, Nigel

    microalgae biofuel technologies for both oil and biogas production, provides an initial assessment of the US or wastewater treatment, (2) biofuel outputs--either biogas only or biogas plus oil, and (3) farm size

  15. Assessing Impact of Biofuel Production on Regional Water Resource...

    Office of Environmental Management (EM)

    Achieving Water-Sustainable Bioenergy Production Breaking the Biological Barriers to Cellulosic Ethanol, June 2006 Breaking the Biological Barriers to Cellulosic Ethanol, June 2006...

  16. Technoeconomic Comparison of Biofuels: Ethanol, Methanol, and Gasoline from Gasification of Woody Residues (Presentation)

    SciTech Connect (OSTI)

    Tarud, J.; Phillips, S.

    2011-08-01

    This presentation provides a technoeconomic comparison of three biofuels - ethanol, methanol, and gasoline - produced by gasification of woody biomass residues. The presentation includes a brief discussion of the three fuels evaluated; discussion of equivalent feedstock and front end processes; discussion of back end processes for each fuel; process comparisons of efficiencies, yields, and water usage; and economic assumptions and results, including a plant gate price (PGP) for each fuel.

  17. A stochastic feasibility study of Texas ethanol production: analysis of Texas Legislature ethanol subsidy proposal 

    E-Print Network [OSTI]

    Gill, Robert Chope

    2002-01-01

    The recent resurgence of interest in ethanol production has prompted the Texas State Legislature to investigate the feasibility of ethanol production in Texas. The reasons for the increased interest in ethanol production ...

  18. Grazing Strategies for Beef Production Escalating energy costs and alternative cropping systems for biofuels production have

    E-Print Network [OSTI]

    for biofuels production have dramatically increased costs of fertilizer, seed, and feed grains. These increased

  19. World Biofuels Production Potential Understanding the Challenges to Meeting the U.S. Renewable Fuel Standard

    SciTech Connect (OSTI)

    Sastri, B.; Lee, A.

    2008-09-15

    This study by the U.S. Department of Energy (DOE) estimates the worldwide potential to produce biofuels including biofuels for export. It was undertaken to improve our understanding of the potential for imported biofuels to satisfy the requirements of Title II of the 2007 Energy Independence and Security Act (EISA) in the coming decades. Many other countries biofuels production and policies are expanding as rapidly as ours. Therefore, we modeled a detailed and up-to-date representation of the amount of biofuel feedstocks that are being and can be grown, current and future biofuels production capacity, and other factors relevant to the economic competitiveness of worldwide biofuels production, use, and trade. The Oak Ridge National Laboratory (ORNL) identified and prepared feedstock data for countries that were likely to be significant exporters of biofuels to the U.S. The National Renewable Energy Laboratory (NREL) calculated conversion costs by conducting material flow analyses and technology assessments on biofuels technologies. Brookhaven National Laboratory (BNL) integrated the country specific feedstock estimates and conversion costs into the global Energy Technology Perspectives (ETP) MARKAL (MARKet ALlocation) model. The model uses least-cost optimization to project the future state of the global energy system in five year increments. World biofuels production was assessed over the 2010 to 2030 timeframe using scenarios covering a range U.S. policies (tax credits, tariffs, and regulations), as well as oil prices, feedstock availability, and a global CO{sub 2} price. All scenarios include the full implementation of existing U.S. and selected other countries biofuels policies (Table 4). For the U.S., the most important policy is the EISA Title II Renewable Fuel Standard (RFS). It progressively increases the required volumes of renewable fuel used in motor vehicles (Appendix B). The RFS requires 36 billion (B) gallons (gal) per year of renewable fuels by 2022. Within the mandate, amounts of advanced biofuels, including biomass-based diesel and cellulosic biofuels, are required beginning in 2009. Imported renewable fuels are also eligible for the RFS. Another key U.S. policy is the $1.01 per gal tax credit for producers of cellulosic biofuels enacted as part of the 2008 Farm Bill. This credit, along with the DOE's research, development and demonstration (RD&D) programs, are assumed to enable the rapid expansion of U.S. and global cellulosic biofuels production needed for the U.S. to approach the 2022 RFS goal. While the Environmental Protection Agency (EPA) has yet to issue RFS rules to determine which fuels would meet the greenhouse gas (GHG) reduction and land use restrictions specified in EISA, we assume that cellulosic ethanol, biomass-to-liquid fuels (BTL), sugar-derived ethanol, and fatty acid methyl ester biodiesel would all meet the EISA advanced biofuel requirements. We also assume that enough U.S. corn ethanol would meet EISA's biofuel requirements or otherwise be grandfathered under EISA to reach 15 B gal per year.

  20. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    for efficient bioethanol production. Adv. Biochem. Eng.date, the optimization of bioethanol production has involved

  1. Multiphase Flow Modeling of Biofuel Production Processes

    SciTech Connect (OSTI)

    D. Gaston; D. P. Guillen; J. Tester

    2011-06-01

    As part of the Idaho National Laboratory's (INL's) Secure Energy Initiative, the INL is performing research in areas that are vital to ensuring clean, secure energy supplies for the future. The INL Hybrid Energy Systems Testing (HYTEST) Laboratory is being established to develop and test hybrid energy systems with the principal objective to safeguard U.S. Energy Security by reducing dependence on foreign petroleum. HYTEST involves producing liquid fuels in a Hybrid Energy System (HES) by integrating carbon-based (i.e., bio-mass, oil-shale, etc.) with non-carbon based energy sources (i.e., wind energy, hydro, geothermal, nuclear, etc.). Advances in process development, control and modeling are the unifying vision for HES. This paper describes new modeling tools and methodologies to simulate advanced energy processes. Needs are emerging that require advanced computational modeling of multiphase reacting systems in the energy arena, driven by the 2007 Energy Independence and Security Act, which requires production of 36 billion gal/yr of biofuels by 2022, with 21 billion gal of this as advanced biofuels. Advanced biofuels derived from microalgal biomass have the potential to help achieve the 21 billion gal mandate, as well as reduce greenhouse gas emissions. Production of biofuels from microalgae is receiving considerable interest due to their potentially high oil yields (around 600 gal/acre). Microalgae have a high lipid content (up to 50%) and grow 10 to 100 times faster than terrestrial plants. The use of environmentally friendly alternatives to solvents and reagents commonly employed in reaction and phase separation processes is being explored. This is accomplished through the use of hydrothermal technologies, which are chemical and physical transformations in high-temperature (200-600 C), high-pressure (5-40 MPa) liquid or supercritical water. Figure 1 shows a simplified diagram of the production of biofuels from algae. Hydrothermal processing has significant advantages over other biomass processing methods with respect to separations. These 'green' alternatives employ a hybrid medium that, when operated supercritically, offers the prospect of tunable physicochemical properties. Solubility can be rapidly altered and phases partitioned selectively to precipitate or dissolve certain components by altering temperature or pressure in the near-critical region. The ability to tune the solvation properties of water in the highly compressible near-critical region facilitates partitioning of products or by-products into separate phases to separate and purify products. Since most challenges related to lipid extraction are associated with the industrial scale-up of integrated extraction systems, the new modeling capability offers the prospect of addressing previously untenable scaling issues.

  2. Radiation Characteristics of Botryococcus braunii, Chlorococcum littorale, and Chlorella sp. Used For CO2 Fixation and Biofuel Production

    E-Print Network [OSTI]

    Berberoglu, Halil; Gomez, Pedro; Pilon, Laurent

    2009-01-01

    CO 2 Fixation and Biofuel Production Halil Berberoglu + ,2 mitigation and biofuel productions namely (i) Botryococcusfor CO 2 ?xation and biofuel production over the spectral

  3. Mapping the Potential for Biofuel Production on Marginal Lands: Differences in Definitions, Data and Models across Scales

    E-Print Network [OSTI]

    Lewis, Sarah M

    2014-01-01

    availability for biofuel production. Environ. Sci. Technol.of land available for biofuel production. Environ. Sci.the Potential for Biofuel Production on Marginal Lands:

  4. Sequencing of Multiple Clostridial Genomes Related to Biomass Conversion and Biofuel Production

    SciTech Connect (OSTI)

    Hemme, Christopher [University of Oklahoma; Mouttaki, Housna [University of Oklahoma; Lee, Yong-Jin [University of Oklahoma, Norman; Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Copeland, A [U.S. Department of Energy, Joint Genome Institute; Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Glavina Del Rio, Tijana [U.S. Department of Energy, Joint Genome Institute; Tice, Hope [U.S. Department of Energy, Joint Genome Institute; Saunders, Elizabeth H [Los Alamos National Laboratory (LANL); Detter, J. Chris [U.S. Department of Energy, Joint Genome Institute; Han, Cliff [Los Alamos National Laboratory (LANL); Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Land, Miriam L [ORNL; Hauser, Loren John [ORNL; Kyrpides, Nikos C [U.S. Department of Energy, Joint Genome Institute; Mikhailova, Natalia [U.S. Department of Energy, Joint Genome Institute; He, Zhili [University of Oklahoma; Wu, Liyou [University of Oklahoma, Norman; Van Nostrand, Joy [University of Oklahoma, Norman; Henrissat, Bernard [Universite d'Aix-Marseille I & II; HE, Qiang [ORNL; Lawson, Paul A. [University of Oklahoma, Norman; Tanner, Ralph S. [University of Oklahoma, Norman; Lynd, Lee R [Thayer School of Engineering at Dartmouth; Wiegel, Juergen [University of Georgia, Athens, GA; Fields, Dr. Matthew Wayne [Montana State University; Arkin, Adam [Lawrence Berkeley National Laboratory (LBNL); Schadt, Christopher Warren [ORNL; Stevenson, Bradley S. [University of Oklahoma, Norman; McInerney, Michael J. [University of Oklahoma, Norman; Yang, Yunfeng [ORNL; Dong, Hailiang [Miami University, Oxford, OH; Xing, Defeng [State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology; Ren, Nanqi [State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology; Wang, Aijie [State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology; Ding, Shi-You [National Energy Renewable Laboratory; Himmel, Michael E [National Renewable Energy Laboratory (NREL); Taghavi, Safiyh [Brookhaven National Laboratory (BNL)/U.S. Department of Energy; Van Der Lelie, Daniel [Brookhaven National Laboratory (BNL); Rubin, Edward M. [U.S. Department of Energy, Joint Genome Institute; Zhou, Jizhong [University of Oklahoma

    2010-01-01

    Modern methods to develop microbe-based biomass conversion processes require a system-level understanding of the microbes involved. Clostridium species have long been recognized as ideal candidates for processes involving biomass conversion and production of various biofuels and other industrial products. To expand the knowledge base for clostridial species relevant to current biofuel production efforts, we have sequenced the genomes of 20 species spanning multiple genera. The majority of species sequenced fall within the class III cellulosome-encoding Clostridium and the class V saccharolytic Thermoanaerobacteraceae. Species were chosen based on representation in the experimental literature as model organisms, ability to degrade cellulosic biomass either by free enzymes or by cellulosomes, ability to rapidly ferment hexose and pentose sugars to ethanol, and ability to ferment synthesis gas to ethanol. The sequenced strains significantly increase the number of noncommensal/nonpathogenic clostridial species and provide a key foundation for future studies of biomass conversion, cellulosome composition, and clostridial systems biology.

  5. Enzymatically based cellulosic ethanol production technology was selected as a key area for biomass

    E-Print Network [OSTI]

    California at Riverside, University of

    Enzymatically based cellulosic ethanol production technology was selected as a key area for biomass crisis' of the 1970s. Although biological conversion of cellulosic biomass to fuels and chemicals through classical mutagenesis and strain Biofuels (2011) 2(4), 421­450 Enzymatic hydrolysis of cellulosic biomass

  6. Ethanol Production: Energy, Economic, and Environmental Losses

    E-Print Network [OSTI]

    Patzek, Tadeusz W.

    of biomass convert solar energy into plant material, but this conversion requires suitable soil, nutrients.1% of the solar energy. Two early studies by the U.S. Department of Energy (USDOE) con- cerning ethanol productionEthanol Production: Energy, Economic, and Environmental Losses David Pimentel, Tad Patzek

  7. Biofuels Fuels Technology Pathway Options for Advanced Drop-in Biofuels Production

    SciTech Connect (OSTI)

    Kevin L Kenney

    2011-09-01

    Advanced drop-in hydrocarbon biofuels require biofuel alternatives for refinery products other than gasoline. Candidate biofuels must have performance characteristics equivalent to conventional petroleum-based fuels. The technology pathways for biofuel alternatives also must be plausible, sustainable (e.g., positive energy balance, environmentally benign, etc.), and demonstrate a reasonable pathway to economic viability and end-user affordability. Viable biofuels technology pathways must address feedstock production and environmental issues through to the fuel or chemical end products. Potential end products include compatible replacement fuel products (e.g., gasoline, diesel, and JP8 and JP5 jet fuel) and other petroleum products or chemicals typically produced from a barrel of crude. Considering the complexity and technology diversity of a complete biofuels supply chain, no single entity or technology provider is capable of addressing in depth all aspects of any given pathway; however, all the necessary expert entities exist. As such, we propose the assembly of a team capable of conducting an in-depth technology pathway options analysis (including sustainability indicators and complete LCA) to identify and define the domestic biofuel pathways for a Green Fleet. This team is not only capable of conducting in-depth analyses on technology pathways, but collectively they are able to trouble shoot and/or engineer solutions that would give industrial technology providers the highest potential for success. Such a team would provide the greatest possible down-side protection for high-risk advanced drop-in biofuels procurement(s).

  8. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    materials for efficient bioethanol production. Adv. Biochem.date, the optimization of bioethanol production has involvedREFERENCES 1 (2006) Bioethanol needs biotech now. Nat.

  9. Ethanol Distribution, Dispensing, and Use: Analysis of a Portion of the Biomass-to-Biofuels Supply Chain Using System Dynamics

    SciTech Connect (OSTI)

    Vimmerstedt, L. J.; Bush, B.; Peterson, S.

    2012-05-01

    The Energy Independence and Security Act of 2007 targets use of 36 billion gallons of biofuels per year by 2022. Achieving this may require substantial changes to current transportation fuel systems for distribution, dispensing, and use in vehicles. The U.S. Department of Energy and the National Renewable Energy Laboratory designed a system dynamics approach to help focus government action by determining what supply chain changes would have the greatest potential to accelerate biofuels deployment. The National Renewable Energy Laboratory developed the Biomass Scenario Model, a system dynamics model which represents the primary system effects and dependencies in the biomass-to-biofuels supply chain. The model provides a framework for developing scenarios and conducting biofuels policy analysis. This paper focuses on the downstream portion of the supply chain-represented in the distribution logistics, dispensing station, and fuel utilization, and vehicle modules of the Biomass Scenario Model. This model initially focused on ethanol, but has since been expanded to include other biofuels. Some portions of this system are represented dynamically with major interactions and feedbacks, especially those related to a dispensing station owner's decision whether to offer ethanol fuel and a consumer's choice whether to purchase that fuel. Other portions of the system are modeled with little or no dynamics; the vehicle choices of consumers are represented as discrete scenarios. This paper explores conditions needed to sustain an ethanol fuel market and identifies implications of these findings for program and policy goals. A large, economically sustainable ethanol fuel market (or other biofuel market) requires low end-user fuel price relative to gasoline and sufficient producer payment, which are difficult to achieve simultaneously. Other requirements (different for ethanol vs. other biofuel markets) include the need for infrastructure for distribution and dispensing and widespread use of high ethanol blends in flexible-fuel vehicles.

  10. Advanced Biofuels (and Bio-products) Process Demonstration Unit...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Biofuels (and Bio-products) Process Demonstration Unit Todd Pray, PhD, MBA March 25, 2015 Biochemical Conversion Area DOE Bioenergy Technologies Office (BETO) Project Peer Review...

  11. Importance of systems biology in engineering microbes for biofuel production

    E-Print Network [OSTI]

    Mukhopadhyay, Aindrila

    2011-01-01

    pharmaceuticals by engineered microbes. Nat Chem Biol 2006,K, Dubchak IL, Arkin AP: The Microbes Online Web site forbiology in engineering microbes for biofuel production

  12. Design, Construction, and Implementation of Novel Biofuel Production...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Design, Construction, and Implementation of Novel Biofuel Production Capabilities in Filamentous Fungi March 26, 2015 Technology Area Review Kenneth S. Bruno Pacific Northwest...

  13. An Update on Ethanol Production and Utilization in Thailand—2014

    SciTech Connect (OSTI)

    Bloyd, Cary N.; Foster, Nikolas AF

    2014-09-01

    In spite of the recent political turmoil, Thailand has continued to develop its ethanol based alternative fuel supply and demand infrastructure. Its support of production and sales of ethanol contributed to more than doubling the production over the past five years alone. In April 2014, average consumption stood at 3.18 million liter per day- more than a third on its way to its domestic consumption goal of 9 million liters per day by 2021. Strong government incentives and the phasing out of non-blended gasoline contributed substantially. Concurrently, exports dropped significantly to their lowest level since 2011, increasing the pressure on Thai policy makers to best balance energy independency goals with other priorities, such as Thailand’s trade balance and environmental aspirations. Utilization of second generation biofuels might have the potential to further expand Thailand’s growing ethanol market. Thailand has also dramatically increased its higher ethanol blend vehicle fleet, with all new vehicles sold in the Thai market now being E20 capable and the number of E85 vehicles increasing three fold in the last year from 100,000 in 2013 to 300,000 in 2014.

  14. Reaction Rates and Catalysts in Ethanol Production (1 Activity...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Reaction Rates and Catalysts in Ethanol Production (1 Activity) Reaction Rates and Catalysts in Ethanol Production (1 Activity) Below is information about the student activity...

  15. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

    Broader source: Energy.gov (indexed) [DOE]

    cellulosic ethanol. Addthis Related Articles Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Refining Bio-Oil alongside Petroleum...

  16. Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production

    E-Print Network [OSTI]

    Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production How can the US for increasing biofuel production have already come under fire because of real and perceived threats.S. will be to ensure that bioenergy supplies meet sustainable production standards that include consideration

  17. Biofuel alternatives to ethanol: pumping the microbial well

    E-Print Network [OSTI]

    Fortman, J. L.

    2010-01-01

    Y. (2007) Biodiesel from microalgae. Biotechnol. Adv. 25,fuel production using microalgae. J. Jpn. Pet. Inst. 48,Figure 1). Biodiesel from microalgae-derived lipids has been

  18. Comparative genomics of xylose-fermenting fungi for enhanced biofuel production

    E-Print Network [OSTI]

    Gasch, Audrey P.

    Comparative genomics of xylose-fermenting fungi for enhanced biofuel production Dana J. Wohlbacha creates specific challenges for microbial biofuel production from cellulosic material. Although engineered | transcriptomics Biofuel production from cellulosic material uses available sub- strates without competing

  19. Comparative genomics of xylose-fermenting fungi for enhanced biofuel production

    E-Print Network [OSTI]

    Wohlbach, Dana J.

    2011-01-01

    fungi for enhanced biofuel production Dana J. Wohlbach 1,2 ,fungi for enhanced biofuel production Dana J. Wohlbach 1,2 ,fungi for enhanced biofuel production Dana J. Wohlbach 1,2 ,

  20. Ethanol production using engineered mutant E. coli

    DOE Patents [OSTI]

    Ingram, Lonnie O. (Gainesville, FL); Clark, David P. (Carbondale, IL)

    1991-01-01

    The subject invention concerns novel means and materials for producing ethanol as a fermentation product. Mutant E. coli are transformed with a gene coding for pyruvate decarboxylase activity. The resulting system is capable of producing relatively large amounts of ethanol from a variety of biomass sources.

  1. Outlook for Biomass Ethanol Production and Demand

    Reports and Publications (EIA)

    2000-01-01

    This paper presents a midterm forecast for biomass ethanol production under three different technology cases for the period 2000 to 2020, based on projections developed from the Energy Information Administration's National Energy Modeling System. An overview of cellulose conversion technology and various feedstock options and a brief history of ethanol usage in the United States are also presented.

  2. Mapping the Potential for Biofuel Production on Marginal Lands: Differences in Definitions, Data and Models across Scales

    E-Print Network [OSTI]

    Lewis, Sarah M

    2014-01-01

    D. Land availability for biofuel production. Environ. Sci.of land available for biofuel production. Environ. Sci.so marginal land for biofuel crops is limited. Energy Policy

  3. Radiation Characteristics of Botryococcus braunii, Chlorococcum littorale, and Chlorella sp. Used For CO2 Fixation and Biofuel Production

    E-Print Network [OSTI]

    Berberoglu, Halil; Gomez, Pedro; Pilon, Laurent

    2009-01-01

    For CO 2 Fixation and Biofuel Production Halil Berberoglufor CO 2 mitigation and biofuel productions namely (i)this technology”, (2) culture of biofuel producing algae is

  4. Methods of dealing with co-products of biofuels in life-cycle analysis and consequent results within the U.S. context.

    SciTech Connect (OSTI)

    Wang, M.; Huo, H.; Arora, S. (Energy Systems)

    2011-01-01

    Products other than biofuels are produced in biofuel plants. For example, corn ethanol plants produce distillers grains and solubles. Soybean crushing plants produce soy meal and soy oil, which is used for biodiesel production. Electricity is generated in sugarcane ethanol plants both for internal consumption and export to the electric grid. Future cellulosic ethanol plants could be designed to co-produce electricity with ethanol. It is important to take co-products into account in the life-cycle analysis of biofuels and several methods are available to do so. Although the International Standard Organization's ISO 14040 advocates the system boundary expansion method (also known as the 'displacement method' or the 'substitution method') for life-cycle analyses, application of the method has been limited because of the difficulty in identifying and quantifying potential products to be displaced by biofuel co-products. As a result, some LCA studies and policy-making processes have considered alternative methods. In this paper, we examine the available methods to deal with biofuel co-products, explore the strengths and weaknesses of each method, and present biofuel LCA results with different co-product methods within the U.S. context.

  5. The feasibility of ethanol production in Texas 

    E-Print Network [OSTI]

    Herbst, Brian Keith

    2003-01-01

    been done in Texas. Previous studies are typically for a generic location and only looked at ethanol production from corn. This study looks at four different plant sizes in three different regions using corn and grain sorghum. This study incorporates...

  6. Ethanol Production, Distribution, and Use: Discussions on Key Issues (Presentation)

    SciTech Connect (OSTI)

    Harrow, G.

    2008-05-14

    From production to the environment, presentation discusses issues surrounding ethanol as a transportation fuel.

  7. Second Generation Biofuels: High-Efficiency Microalgae for Biodiesel Production

    E-Print Network [OSTI]

    Kudela, Raphael M.

    range of feedstocks for the production of biodiesel, bioethanol, biomethane and biohydrogen. Biodiesel production systems using microalgae. Keywords Algae . Carbon sequestration . Biofuel . Biogas . Biohydrogen . Biomethane . Bioreactor. Lipid . Oil . Raceway pond . Triacylglycerides . Review Abbreviations BTL biomass

  8. "Trojan Horse" strategy for deconstruction of biomass for biofuels production.

    SciTech Connect (OSTI)

    Sinclair, Michael B.; Hadi, Masood Z.; Timlin, Jerilyn Ann; Thomson, James; Whalen, Maureen; Thilmony, Roger; Tran-Gyamfi, Mary; Simmons, Blake Alexander; Sapra, Rajat

    2008-08-01

    Production of renewable biofuels to displace fossil fuels currently consumed in the transportation sector is a pressing multi-agency national priority. Currently, nearly all fuel ethanol is produced from corn-derived starch. Dedicated 'energy crops' and agricultural waste are preferred long-term solutions for renewable, cheap, and globally available biofuels as they avoid some of the market pressures and secondary greenhouse gas emission challenges currently facing corn ethanol. These sources of lignocellulosic biomass are converted to fermentable sugars using a variety of chemical and thermochemical pretreatments, which disrupt cellulose and lignin cross-links, allowing exogenously added recombinant microbial enzymes to more efficiently hydrolyze the cellulose for 'deconstruction' into glucose. This process is plagued with inefficiencies, primarily due to the recalcitrance of cellulosic biomass, mass transfer issues during deconstruction, and low activity of recombinant deconstruction enzymes. Costs are also high due to the requirement for enzymes and reagents, and energy-intensive and cumbersome pretreatment steps. One potential solution to these problems is found in synthetic biology; they propose to engineer plants that self-produce a suite of cellulase enzymes targeted to the apoplast for cleaving the linkages between lignin and cellulosic fibers; the genes encoding the degradation enzymes, also known as cellulases, are obtained from extremophilic organisms that grow at high temperatures (60-100 C) and acidic pH levels (<5). These enzymes will remain inactive during the life cycle of the plant but become active during hydrothermal pretreatment i.e., elevated temperatures. Deconstruction can be integrated into a one-step process, thereby increasing efficiency (cellulose-cellulase mass-transfer rates) and reducing costs. The proposed disruptive technologies address biomass deconstruction processes by developing transgenic plants encoding a suite of enzymes used in cellulosic deconstruction. The unique aspects of this technology are the rationally engineered, highly productive extremophilic enzymes, targeted to specific cellular locations (apoplast) and their dormancy during normal plant proliferation, which become Trojan horses during pretreatment conditions. They have been leveraging established Sandia's enzyme-engineering and imaging capabilities. Their technical approach not only targets the recalcitrance and mass-transfer problem during biomass degradation but also eliminates the costs associated with industrial-scale production of microbial enzymes added during processing.

  9. Energy Utilization in Fermentation Ethanol Production 

    E-Print Network [OSTI]

    Easley, C. E.

    1987-01-01

    valid consideration when high grade fuel such as petroleum or natural gas is the energy source for the ethanol plant. But for plants running on coal or other solid fuels, ethanol production can be considered to be a form of "coal liquefaction.... The three main steps are cooking, which opens the starch bundles (called gelatinization) making them accessible for enzymatic action; liquefaction, in which large starch molecules are cut into smaller segments by enzymes, thus making the starch...

  10. Viability Studies of Biofuels Though biofuels (like ethanol) promise renewable "green" energy, these

    E-Print Network [OSTI]

    Hill, Wendell T.

    calculates the energy that goes into production, the energy that is extracted out, and the costs associated not displace food crops or increase the cost of food. Little energy is needed to grow these microscopic plants used, and the energy required to make the herbicides. In his cost-benefit analysis, he ultimately

  11. Life-Cycle Greenhouse Gas and Energy Analyses of Algae Biofuels Production

    E-Print Network [OSTI]

    Life-Cycle Greenhouse Gas and Energy Analyses of Algae Biofuels Production Transportation Energy The Issue Algae biofuels directly address the Energy Commission's Public Interest Energy Research fuels more carbonintensive than conventional biofuels. Critics of this study argue that alternative

  12. Alternative and Renewable fuels and Vehicle Technology Program Subject Area: Biofuels production Facilities

    E-Print Network [OSTI]

    Alternative and Renewable fuels and Vehicle Technology Program Subject Area: Biofuels production: Commercial Facilities · Applicant's Legal Name: Yokayo Biofuels, Inc. · Name of project: A Catalyst for Success · Project Description: Yokayo Biofuels, an industry veteran with over 10 years experience

  13. Method and system for ethanol production

    DOE Patents [OSTI]

    Feder, H.M.; Chen, M.J.

    1980-05-21

    A transition metal carbonyl and a tertiary amine are employed as a homogeneous catalytic system in methanol or a less volatile solvent to react methanol with carbon monoxide and hydrogen gas producing ethanol and carbon dioxide. The gas contains a high carbon monoxide to hydrogen ratio as is present in a typical gasifier product. The reaction has potential for anhydrous ethanol production as carbon dioxide rather than water is produced. The only other significant by-product is methane. Selected transition metal carbonyls include those of iron, ruthenium and possibly manganese and osmium. Selected amines include trimethylamine, N-Methylpyrrolidine, 24-diazabicyclooctane, dimethyneopentylamine and 2-pryidinol.

  14. Method and system for ethanol production

    DOE Patents [OSTI]

    Feder, Harold M. (Darien, IL); Chen, Michael J. (Darien, IL)

    1981-01-01

    A transition metal carbonyl and a tertiary amine are employed as a homogeneous catalytic system in methanol or a less volatile solvent to react methanol with carbon monoxide and hydrogen gas producing ethanol and carbon dioxide. The gas contains a high carbon monoxide to hydrogen ratio as is present in a typical gasifier product. The reaction has potential for anhydrous ethanol production as carbon dioxide rather than water is produced. The only other significant by product is methane. Selected transition metal carbonyls include those of iron, ruthenium and possibly manganese and osmium. Selected amines include trimethylamine, N-Methylpyrrolidine, 24-diazabicyclooctane, dimethyneopentylamine and 2-pryidinol.

  15. International Trade of Biofuels (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2013-05-01

    In recent years, the production and trade of biofuels has increased to meet global demand for renewable fuels. Ethanol and biodiesel contribute much of this trade because they are the most established biofuels. Their growth has been aided through a variety of policies, especially in the European Union, Brazil, and the United States, but ethanol trade and production have faced more targeted policies and tariffs than biodiesel. This fact sheet contains a summary of the trade of biofuels among nations, including historical data on production, consumption, and trade.

  16. Impact of Projected Biofuel Production on Water Use and Water...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Impact of Projected Biofuel Production on Water Use and Water Quality March 27-29, 2015 Analysis and Sustainability WBS:4.2.1.10 May Wu Argonne National Laboratory This...

  17. Slab waveguide photobioreactors for microalgae based biofuel production{{ Erica Eunjung Jung,a

    E-Print Network [OSTI]

    Angenent, Lars T.

    Slab waveguide photobioreactors for microalgae based biofuel production{{ Erica Eunjung Jung are a promising feedstock for sustainable biofuel production. At present, however, there are a number to substantial interest in increasing biofuel production. Biofuels can be produced from a number of different

  18. Method and system for ethanol production

    DOE Patents [OSTI]

    Feder, Harold M. (Darien, IL); Chen, Michael J. (Darien, IL)

    1983-01-01

    A transition metal carbonyl and a tertiary amine are employed as a homogeneous catalytic system in methanol or a less volatile solvent to react methanol with carbon monoxide and hydrogen gas producing ethanol and carbon dioxide. The gas contains a high carbon monoxide to hydrogen ratio as is present in a typical gasifier product. The reaction has potential for anhydrous ethanol production as carbon dioxide rather than water is produced. Selected transition metal carbonyls include those of iron, rhodium ruthenium, manganese in combination with iron and possibly osmium. Selected amines include trimethylamine, N-Methylpyrrolidine, 2,4-diazabicyclooctane, dimethylneopentylamine, N-methylpiperidine and derivatives of N-methylpiperidine.

  19. Method and system for ethanol production

    DOE Patents [OSTI]

    Feder, H.M.; Chen, M.J.

    1981-09-24

    A transition metal carbonyl and a tertiary amine are employed as a homogeneous catalytic system in methanol or a less volatile solvent to react methanol with carbon monoxide and hydrogen gas producing ethanol and carbon dioxide. The gas contains a high carbon monoxide to hydrogen ratio as is present in a typical gasifier product. The reaction has potential for anhydrous ethanol production as carbon dioxide rather than water is produced. Selected transition metal carbonyls include those of iron, rhodium, ruthenium, manganese in combination with iron and possibly osmium. Selected amines include trimethylamine, N-Methylpyrrolidine, 2,4-diazabicyclooctane, dimethylneopentylamine, N-methylpiperidine and derivatives of N-methylpiperidine.

  20. An Indirect Route for Ethanol Production

    SciTech Connect (OSTI)

    Eggeman, T.; Verser, D.; Weber, E.

    2005-04-29

    The ZeaChem indirect method is a radically new approach to producing fuel ethanol from renewable resources. Sugar and syngas processing platforms are combined in a novel way that allows all fractions of biomass feedstocks (e.g. carbohydrates, lignins, etc.) to contribute their energy directly into the ethanol product via fermentation and hydrogen based chemical process technologies. The goals of this project were: (1) Collect engineering data necessary for scale-up of the indirect route for ethanol production, and (2) Produce process and economic models to guide the development effort. Both goals were successfully accomplished. The projected economics of the Base Case developed in this work are comparable to today's corn based ethanol technology. Sensitivity analysis shows that significant improvements in economics for the indirect route would result if a biomass feedstock rather that starch hydrolyzate were used as the carbohydrate source. The energy ratio, defined as the ratio of green energy produced divided by the amount of fossil energy consumed, is projected to be 3.11 to 12.32 for the indirect route depending upon the details of implementation. Conventional technology has an energy ratio of 1.34, thus the indirect route will have a significant environmental advantage over today's technology. Energy savings of 7.48 trillion Btu/yr will result when 100 MMgal/yr (neat) of ethanol capacity via the indirect route is placed on-line by the year 2010.

  1. Biofuels

    SciTech Connect (OSTI)

    Kalluri, Udaya

    2014-05-02

    Udaya Kalluri is part of a multidisciplinary scientific team working to unlock plants in order to create more potent biofuels without harsh processing.

  2. Biofuels

    ScienceCinema (OSTI)

    Kalluri, Udaya

    2014-05-23

    Udaya Kalluri is part of a multidisciplinary scientific team working to unlock plants in order to create more potent biofuels without harsh processing.

  3. Questions, Answers and Clarifications Commercial Scale Advanced Biofuels Production Facilities Solicitation

    E-Print Network [OSTI]

    Questions, Answers and Clarifications Commercial Scale Advanced Biofuels Production Facilities biofuels production facility? A.1 An existing biofuels facility is an existing facility that, as of the application due date of PON-13-601, produces (or did produce) biofuels in California. Q.2 Must an eligible

  4. MN Center for Renewable Energy: Cellulosic Ethanol, Optimization of Bio-fuels in Internal Combustion Engines, & Course Development for Technicians in These Areas

    SciTech Connect (OSTI)

    John Frey

    2009-02-22

    This final report for Grant #DE-FG02-06ER64241, MN Center for Renewable Energy, will address the shared institutional work done by Minnesota State University, Mankato and Minnesota West Community and Technical College during the time period of July 1, 2006 to December 30, 2008. There was a no-cost extension request approved for the purpose of finalizing some of the work. The grant objectives broadly stated were to 1) develop educational curriculum to train technicians in wind and ethanol renewable energy, 2) determine the value of cattails as a biomass crop for production of cellulosic ethanol, and 3) research in Optimization of Bio-Fuels in Internal Combustion Engines. The funding for the MN Center for Renewable Energy was spent on specific projects related to the work of the Center.

  5. Ethanol production in Gram-positive microbes

    DOE Patents [OSTI]

    Ingram, L.O.; Barbosa-Alleyne, M.D.F.

    1996-01-09

    The subject invention concerns the transformation of Gram-positive bacteria with heterologous genes which confer upon these microbes the ability to produce ethanol as a fermentation product. Specifically exemplified is the transformation of bacteria with genes, obtainable from Zymomonas mobilis, which encode pyruvate decarboxylase and alcohol dehydrogenase. 2 figs.

  6. Ethanol production in Gram-positive microbes

    DOE Patents [OSTI]

    Ingram, L.O.; Barbosa-Alleyne, M.D.F.

    1999-06-29

    The subject invention concerns the transformation of Gram-positive bacteria with heterologous genes which confer upon these microbes the ability to produce ethanol as a fermentation product. Specifically exemplified is the transformation of bacteria with genes, obtainable from Zymomonas mobilis, which encode pyruvate decarboxylase and alcohol dehydrogenase. 2 figs.

  7. Ethanol production in Gram-positive microbes

    DOE Patents [OSTI]

    Ingram, Lonnie O'Neal (Gainesville, FL); Barbosa-Alleyne, Maria D. F. (Gainesville, FL)

    1996-01-01

    The subject invention concerns the transformation of Gram-positive bacteria with heterologous genes which confer upon these microbes the ability to produce ethanol as a fermentation product. Specifically exemplified is the transformation of bacteria with genes, obtainable from Zymomonas mobilis, which encode pyruvate decarboxylase and alcohol dehydrogenase.

  8. Ethanol production in gram-positive microbes

    DOE Patents [OSTI]

    Ingram, Lonnie O'Neal (Gainesville, FL); Barbosa-Alleyne, Maria D. F. (Gainesville, FL)

    1999-01-01

    The subject invention concerns the transformation of Gram-positive bacteria with heterologous genes which confer upon these microbes the ability to produce ethanol as a fermentation product. Specifically exemplified is the transformation of bacteria with genes, obtainable from Zymomonas mobilis, which encode pyruvate decarboxylase and alcohol dehydrogenase.

  9. Biofuels and Agriculture

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    Biofuels and Agriculture Biofuels and Agriculture A Factsheet for Farmers American farmers have "biofuels" like ethanol and biodiesel mean that new markets are opening up. These can provide extra farm as growing markets for other biofuels like biodiesel. What are biofuels? Biofuels (short for "biomass fuels

  10. RESEARCH Open Access Simultaneous cell growth and ethanol production

    E-Print Network [OSTI]

    Chen, Wilfred

    RESEARCH Open Access Simultaneous cell growth and ethanol production from cellulose steps to their practical usage for ethanol production. Ideally, a recombinant microorganism, possessing the capability to utilize cellulose for simultaneous growth and ethanol production, is of great interest. We have

  11. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, Charles R.

    2012-01-01

    13 Javier Perez I II. ETHANOL FERMENTATION STUDIES A. B.Development Studies of Ethanol Production--------------- 19of Cellulose and Production of Ethanol." (June 1979) and (b)

  12. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2011-01-01

    EthanolOf Cellulose And Production Of Ethanol I Charles R. WilkeCELLULOSE AND PRODUCTION OF ETHANOL under auspices of U.S.

  13. Biochemical Production of Endophytic Yeast Biofuel: what and why

    E-Print Network [OSTI]

    Brown, Sally

    , local production of crops, CO2 reincorporation Degrade lands due to oil sand mining, drilling, exBiochemical Production of Endophytic Yeast Biofuel: what and why In the U.S., the debate about because the farms are growing corns (first generation) for fuel production instead of for human and animal

  14. Biofuels: Review of Policies and Impacts

    E-Print Network [OSTI]

    Janda, Karel; Kristoufek, Ladislav; Zilberman, David

    2011-01-01

    energy markets: the German biodiesel market. DARE Discussioncosts and bene?ts of biodiesel and ethanol biofuels.Keywords: Biofuels; Ethanol; Biodiesel JEL Codes: Q16; Q42

  15. Ethanol Production and Gasoline Prices: A Spurious Correlation

    E-Print Network [OSTI]

    Rothman, Daniel

    Ethanol Production and Gasoline Prices: A Spurious Correlation Christopher R. Knittel and Aaron proponents of ethanol have argued that ethanol production greatly lowers gasoline prices, with one industry group claiming it reduced gasoline prices by 89 cents in 2010 and $1.09 in 2011. The estimates have been

  16. Development of a microbial process for the conversion of carbon dioxide and electricity to higher alcohols as biofuels

    E-Print Network [OSTI]

    Li, Han

    2013-01-01

    costs and benefits of biodiesel and ethanol biofuels. Proc3):264-271. Chisti Y: Biodiesel from microalgae. Biotechnolcoli: implications for biodiesel production. Metab Eng 2008,

  17. Genetic resources for advanced biofuel production described with the Gene Ontology

    SciTech Connect (OSTI)

    Torto-Alalibo, Trudy; Purwantini, Endang; Lomax, Jane; Setubal, Joao C.; Mukhopadhyay, Biswarup; Tyler, Brett M.

    2014-10-10

    Dramatic increases in research in the area of microbial biofuel production coupled with high-throughput data generation on bioenergy-related microbes has led to a deluge of information in the scientific literature and in databases. Consolidating this information and making it easily accessible requires a unified vocabulary.The Gene Ontology (GO) fulfills that requirement, as it is a well-developed structured vocabulary that describes the activities and locations of gene products in a consistent manner across all kingdoms of life. The Microbial ENergy processes Gene Ontology (http://www.mengo.biochem.vt.edu) project is extending the GO to include new terms to describe microbial processes of interest to bioenergy production. Our effort has added over 600 bioenergy related terms to the Gene Ontology. These terms will aid in the comprehensive annotation of gene products from diverse energy-related microbial genomes. An area of microbial energy research that has received a lot of attention is microbial production of advanced biofuels. These include alcohols such as butanol, isopropanol, isobutanol, and fuels derived from fatty acids, isoprenoids, and polyhydroxyalkanoates. These fuels are superior to first generation biofuels (ethanol and biodiesel esterified from vegetable oil or animal fat), can be generated from non-food feedstock sources, can be used as supplements or substitutes for gasoline, diesel and jet fuels, and can be stored and distributed using existing infrastructure. We review the roles of genes associated with synthesis of advanced biofuels, and at the same time introduce the use of the GO to describe the functions of these genes in a standardized way.

  18. Genetic resources for advanced biofuel production described with the Gene Ontology

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Torto-Alalibo, Trudy; Purwantini, Endang; Lomax, Jane; Setubal, Joao C.; Mukhopadhyay, Biswarup; Tyler, Brett M.

    2014-10-10

    Dramatic increases in research in the area of microbial biofuel production coupled with high-throughput data generation on bioenergy-related microbes has led to a deluge of information in the scientific literature and in databases. Consolidating this information and making it easily accessible requires a unified vocabulary.The Gene Ontology (GO) fulfills that requirement, as it is a well-developed structured vocabulary that describes the activities and locations of gene products in a consistent manner across all kingdoms of life. The Microbial ENergy processes Gene Ontology (http://www.mengo.biochem.vt.edu) project is extending the GO to include new terms to describe microbial processes of interest to bioenergymore »production. Our effort has added over 600 bioenergy related terms to the Gene Ontology. These terms will aid in the comprehensive annotation of gene products from diverse energy-related microbial genomes. An area of microbial energy research that has received a lot of attention is microbial production of advanced biofuels. These include alcohols such as butanol, isopropanol, isobutanol, and fuels derived from fatty acids, isoprenoids, and polyhydroxyalkanoates. These fuels are superior to first generation biofuels (ethanol and biodiesel esterified from vegetable oil or animal fat), can be generated from non-food feedstock sources, can be used as supplements or substitutes for gasoline, diesel and jet fuels, and can be stored and distributed using existing infrastructure. We review the roles of genes associated with synthesis of advanced biofuels, and at the same time introduce the use of the GO to describe the functions of these genes in a standardized way.« less

  19. Physical Energy Accounting in California: A Case Study of Cellulosic Ethanol Production

    SciTech Connect (OSTI)

    Coughlin, Katie; Fridley, David

    2008-07-17

    California's target for greenhouse gas reduction in part relies on the development of viable low-carbon fuel alternatives to gasoline. It is often assumed that cellulosic ethanol--ethanol made from the structural parts of a plant and not from the food parts--will be one of these alternatives. This study examines the physical viability of a switchgrass-based cellulosic ethanol industry in California from the point of view of the physical requirements of land, water, energy and other material use. Starting from a scenario in which existing irrigated pastureland and fiber-crop land is converted to switchgrass production, the analysis determines the total acreage and water supply available and the resulting total biofuel feedstock output under different assumed yields. The number and location of cellulosic ethanol biorefineries that can be supported is also determined, assuming that the distance from field to biorefinery would be minimized. The biorefinery energy input requirement, available energy from the fraction of biomass not converted to ethanol, and energy output is calculated at various levels of ethanol yields, making different assumptions about process efficiencies. The analysis shows that there is insufficient biomass (after cellulose separation and fermentation into ethanol) to provide all the process energy needed to run the biorefinery; hence, the purchase of external energy such as natural gas is required to produce ethanol from switchgrass. The higher the yield of ethanol, the more external energy is needed, so that the net gains due to improved process efficiency may not be positive. On 2.7 million acres of land planted in switchgrass in this scenario, the switchgrass outputproduces enough ethanol to substitute for only 1.2 to 4.0percent of California's gasoline consumption in 2007.

  20. Can feedstock production for biofuels be sustainable in California?

    E-Print Network [OSTI]

    Kaffka, Stephen R.

    2009-01-01

    tolife.org/biofuels. [US EPA] US Environmental Protection1–9. The path forward for biofuels and biomaterials. Scienceof individual assessment of biofuels. EMPA, Technology and

  1. SYNTHESIS Industrial-strength ecology: trade-offs and opportunities in algal biofuel production

    E-Print Network [OSTI]

    for biofuel productivity and resilience. We argue that a community engineering approach that manages and productive biofuel ecosystems. We review evidence for trade-offs, challenges and opportunities in algal biofuel cultivation with a goal of guiding research towards intensifying bioenergy production using

  2. Impacts of land use change due to biofuel crops on carbon balance, bioenergy production, and agricultural

    E-Print Network [OSTI]

    Zhuang, Qianlai

    Impacts of land use change due to biofuel crops on carbon balance, bioenergy production that biofuel crops have much higher net pri- mary production (NPP) than soybean and wheat crops. When food). Global biofuel production has increased dramatically in the last decade, especially in United States

  3. Increasing corn for biofuel production reduces biocontrol services in agricultural landscapes

    E-Print Network [OSTI]

    Landis, Doug

    Increasing corn for biofuel production reduces biocontrol services in agricultural landscapes-fold expansion of biofuel production (4), which will likely drive further expansion of corn area crops that compete with corn for land. Increased corn acreage for biofuel production has raised con

  4. Directed Evolution of a Cellodextrin Transporter for Improved Biofuel Production Under Anaerobic

    E-Print Network [OSTI]

    Zhao, Huimin

    Directed Evolution of a Cellodextrin Transporter for Improved Biofuel Production Under Anaerobic that anaerobic biofuel production could be significantly improved via directed evolution of a sugar transporter for cellulosic biofuel production (Hong and Nielsen, 2012; Sun et al., 2012). Unfortunately, wild type S

  5. Potential Direct and Indirect Effects of Global Cellulosic Biofuel Production on Greenhouse

    E-Print Network [OSTI]

    Potential Direct and Indirect Effects of Global Cellulosic Biofuel Production on Greenhouse Gas on recycled paper #12;1 Potential Direct and Indirect Effects of Global Cellulosic Biofuel Production. Melillo*, John M. Reilly§ , and Sergey Paltsev§ Abstract The production of cellulosic biofuels may have

  6. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, Charles R.

    2011-01-01

    60,700 ETHANOL RECOVERY Dist. Column CondenserF2 Steam Exchanger Ethanol Absorber 10 ft. diameter. 38Cellulose and Production of Ethanol," Progress Report, LBL-

  7. PILOT PLANT STUDIES OF THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2010-01-01

    5 EthanolBazua, D.C. and C.R. Wilke, "Ethanol Effects on the Kineticsto the Production of Ethanol, LBL-5963. (Submitted to

  8. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2011-01-01

    BIOCONVERSION TO SUGARS AND ETHANOL BERKELEY PROGRAM--JulyXylose Fermentation to Ethanol (a) (b) Fusarium oxysporum (OF CELLULOSE AND PRODUCTION OF ETHANOL under auspices of

  9. Cutting Biofuel Production Costs | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding inCustomer-Comments Sign In About |NationalCutting Biofuel

  10. Biofuel impacts on water.

    SciTech Connect (OSTI)

    Tidwell, Vincent Carroll; Malczynski, Leonard A.; Sun, Amy Cha-Tien

    2011-01-01

    Sandia National Laboratories and General Motors Global Energy Systems team conducted a joint biofuels systems analysis project from March to November 2008. The purpose of this study was to assess the feasibility, implications, limitations, and enablers of large-scale production of biofuels. 90 billion gallons of ethanol (the energy equivalent of approximately 60 billion gallons of gasoline) per year by 2030 was chosen as the book-end target to understand an aggressive deployment. Since previous studies have addressed the potential of biomass but not the supply chain rollout needed to achieve large production targets, the focus of this study was on a comprehensive systems understanding the evolution of the full supply chain and key interdependencies over time. The supply chain components examined in this study included agricultural land use changes, production of biomass feedstocks, storage and transportation of these feedstocks, construction of conversion plants, conversion of feedstocks to ethanol at these plants, transportation of ethanol and blending with gasoline, and distribution to retail outlets. To support this analysis, we developed a 'Seed to Station' system dynamics model (Biofuels Deployment Model - BDM) to explore the feasibility of meeting specified ethanol production targets. The focus of this report is water and its linkage to broad scale biofuel deployment.

  11. Methods for the economical production of biofuel from biomass

    DOE Patents [OSTI]

    Hawkins, Andrew C; Glassner, David A; Buelter, Thomas; Wade, James; Meinhold, Peter; Peters, Matthew W; Gruber, Patrick R; Evanko, William A; Aristidou, Aristos A; Landwehr, Marco

    2013-04-30

    Methods for producing a biofuel are provided. Also provided are biocatalysts that convert a feedstock to a biofuel.

  12. Photobioreactor Design for Commercial Biofuel Production from Microalgae Aditya M. Kunjapur* and R. Bruce Eldridge

    E-Print Network [OSTI]

    Eldridge, R. Bruce

    Photobioreactor Design for Commercial Biofuel Production from Microalgae Aditya M. Kunjapur* and R This review paper describes systems used to cultivate microalgae for biofuel production. It addresses general of biofuel. This paper also highlights the concept of combining open and closed systems and concludes

  13. Measurements and predictions of the radiation characteristics of biofuel-producing microorganisms

    E-Print Network [OSTI]

    Heng, Ri-Liang

    2015-01-01

    Biofuel Production frommicroalgal biofuel production [1]. . . . . . . . . . . . . .2 ?xation and biofuel production”, Journal of Quantitative

  14. Second-Generation Biofuels from Multi-Product Biorefineries Combine Economic Sustainability With Environmental Sustainability

    Broader source: Energy.gov [DOE]

    Breakout Session 3B—Integration of Supply Chains III: Algal Biofuels Strategy Second-Generation Biofuels from Multi-Product Biorefineries Combine Economic Sustainability With Environmental Sustainability Martin Sabarsky, Chief Executive Officer, Cellana

  15. Tappable Pine Trees: Commercial Production of Terpene Biofuels in Pine

    SciTech Connect (OSTI)

    None

    2012-01-01

    PETRO Project: The University of Florida is working to increase the amount of turpentine in harvested pine from 4% to 20% of its dry weight. While enhanced feedstocks for biofuels have generally focused on fuel production from leafy plants and grasses, the University of Florida is experimenting with enhancing fuel production in a species of pine that is currently used in the paper pulping industry. Pine trees naturally produce around 3-5% terpene content in the wood—terpenes are the energy-dense fuel molecules that are the predominant components of turpentine. The team aims to increase the terpene storage potential and production capacity while improving the terpene composition to a point at which the trees could be tapped while alive, like sugar maples. Growth and production from these trees will take years, but this pioneering technology could have significant impact in making available an economical and domestic source of aviation and diesel biofuels.

  16. Biofuels: Review of Policies and Impacts

    E-Print Network [OSTI]

    Janda, Karel; Kristoufek, Ladislav; Zilberman, David

    2011-01-01

    standards for biofuel production make little economic sense.to biofuels. While the biofuel production and consumptionand further increases in biofuel production are driven pri-

  17. Turning Bacteria into Biofuel: Development of an Integrated Microbial Electrocatalytic (MEC) System for Liquid Biofuel Production from CO2

    SciTech Connect (OSTI)

    2010-08-01

    Electrofuels Project: LBNL is improving the natural ability of a common soil bacteria called Ralstonia eutropha to use hydrogen and carbon dioxide for biofuel production. First, LBNL is genetically modifying the bacteria to produce biofuel at higher concentrations. Then, LBNL is using renewable electricity obtained from solar, wind, or wave power to produce high amounts of hydrogen in the presence of the bacteria—increasing the organism’s access to its energy source and improving the efficiency of the biofuel-creation process. Finally, LBNL is tethering electrocatalysts to the bacteria’s surface which will further accelerate the rate at which the organism creates biofuel. LBNL is also developing a chemical method to transform the biofuel that the bacteria produce into ready-to-use jet fuel.

  18. Biofuels from Microalgae: Review of Products, Processes and Potential, with Special Focus on Dunaliella sp.

    SciTech Connect (OSTI)

    Huesemann, Michael H.; Benemann, John R.

    2009-12-31

    There is currently great interest in using microalgae for the production of biofuels, mainly due to the fact that microalgae can produce biofuels at a much higher productivity than conventional plants and that they can be cultivated using water, in particular seawater, and land not competing for resources with conventional agriculture. However, at present such microalgae-based technologies are not yet developed and the economics of such processes are uncertain. We review power generation by direct combustion, production of hydrogen and other fuel gases and liquids by gasification and pyrolysis, methane generation by anaerobic digestion, ethanol fermentations, and hydrogen production by dark and light-driven metabolism. We in particular discuss the production of lipids, vegetable oils and hydrocarbons, which could be converted to biodiesel. Direct combustion for power generation has two major disadvantages in that the high N-content of algal biomass causes unacceptably high NOx emissions and losses of nitrogen fertilizer. Thus, the use of sun-dried microalgal biomass would not be cost-competitive with other solid fuels such as coal and wood. Thermochemical conversion processes such as gasification and pyrolysis have been successfully demonstrated in the laboratory but will be difficult to scale up commercially and suffers from similar, though sometimes not as stringent, limitations as combustion. Anaerobic digestion of microalgal cells yields only about 0.3 L methane per g volatile solids destroyed, about half of the maximum achievable, but yields can be increased by adding carbon rich substrates to circumvent ammonia toxicity caused by the N-rich algal biomass. Anaerobic digestion would be best suited for the treatment of algal biomass waste after value-added products have been separated. Algae can also be grown to accumulate starches or similar fermentable products, and ethanol or similar (e.g., butanol) fermentations could be applied to such biomass, but research is required on increasing solvent yields. Dark fermentation of algal biomass can also produce hydrogen, but, as for other fermentations, only at low yields. Hydrogen can also be generated by algae in the light, however, this process has not yet been demonstrated in any way that could be scaled up and, in any event, Dunaliella, is not known to produce hydrogen. In response to nutrient deficiency (nitrogen or silicon), some microalgae accumulate neutral lipids which, after physical extraction, could be converted, via transesterification with methanol, to biodiesel. Nitrogen-limitation does not appear to increase either cellular lipid content or lipid productivity in Dunaliella. Results from life cycle energy analyses indicate that cultivation of microalgal biomass in open raceway ponds has a positive energy output ratio (EOR), approaching up to 10 (i.e., the caloric energy output from the algae is 10 times greater than the fossil energy inputs), but EOR are less than 1 for biomass grown in engineered photobioreactors. Thus, from both an energetic as well as economic perspective, only open ponds systems can be considered. Significant long-term R&D will be required to make microalgal biofuels processes economically competitive. Specifically, future research should focus on (a) the improvement of biomass productivities (i.e., maximizing solar conversion efficiencies), (b) the selection and isolation of algal strains that can be mass cultured and maintained stably for long periods, (c) the production of algal biomass with a high content of lipids, carbohydrates, and co-products, at high productivity, (d) the low cost harvesting of the biomass, and (e) the extraction and conversion processes to actually derive the biofuels. For Dunaliella specifically, the highest potential is in the co-production of biofuels with high-value animal feeds based on their carotenoid content.

  19. Increasing Feedstock Production for Biofuels: Economic Drivers, Environmental Implications, and the Role of Research

    SciTech Connect (OSTI)

    none,

    2009-10-27

    The Biomass Research and Development Board (Board) commissioned an economic analysis of feedstocks to produce biofuels. The Board seeks to inform investments in research and development needed to expand biofuel production. This analysis focuses on feedstocks; other interagency teams have projects underway for other parts of the biofuel sector (e.g., logistics). The analysis encompasses feedstocks for both conventional and advanced biofuels from agriculture and forestry sources.

  20. Sugar-Based Ethanol Biorefinery: Ethanol, Succinic Acid and By-Product Production

    SciTech Connect (OSTI)

    Donal F. Day

    2009-03-31

    The work conducted in this project is an extension of the developments itemized in DE-FG-36-04GO14236. This program is designed to help the development of a biorefinery based around a raw sugar mill, which in Louisiana is an underutilized asset. Some technical questions were answered regarding the addition of a biomass to ethanol facility to existing sugar mills. The focus of this work is on developing technology to produce ethanol and valuable by-products from bagasse. Three major areas are addressed, feedstock storage, potential by-products and the technology for producing ethanol from dilute ammonia pre-treated bagasse. Sugar mills normally store bagasse in a simple pile. During the off season there is a natural degradation of the bagasse, due to the composting action of microorganisms in the pile. This has serious implications if bagasse must be stored to operate a bagasse/biorefinery for a 300+ day operating cycle. Deterioration of the fermentables in bagasse was found to be 6.5% per month, on pile storage. This indicates that long term storage of adequate amounts of bagasse for year-round operation is probably not feasible. Lignin from pretreatment seemed to offer a potential source of valuable by-products. Although a wide range of phenolic compounds were present in the effluent from dilute ammonia pretreatment, the concentrations of each (except for benzoic acid) were too low to consider for extraction. The cellulosic hydrolysis system was modified to produce commercially recoverable quantities of cellobiose, which has a small but growing market in the food process industries. A spin-off of this led to the production of a specific oligosaccharide which appears to have both medical and commercial implications as a fungal growth inhibitor. An alternate use of sugars produced from biomass hydrolysis would be to produce succinic acid as a chemical feedstock for other conversions. An organism was developed which can do this bioconversion, but the economics of succinic acid production were such that it could not compete with current commercial practice. To allow recovery of commercial amounts of ethanol from bagasse fermentation, research was conducted on high solids loading fermentations (using S. cerevisiae) with commercial cellulase on pretreated material. A combination of SHF/SSF treatment with fed-batch operation allowed fermentation at 30% solids loading. Supplementation of the fermentation with a small amount of black-strap molasses had results beyond expectation. There was an enhancement of conversion as well as production of ethanol levels above 6.0% w/w, which is required both for efficient distillation as well as contaminant repression. The focus of fermentation development was only on converting the cellulose to ethanol, as this yeast is not capable of fermenting both glucose and xylose (from hemicellulose). In anticipation of the future development of such an organism, we screened the commercially available xylanases to find the optimum mix for conversion of both cellulose and hemicellulose. A different mixture than the spezyme/novozyme mix used in our fermentation research was found to be more efficient at converting both cellulose and hemicellulose. Efforts were made to select a mutant of Pichia stipitis for ability to co-ferment glucose and xylose to ethanol. New mutation technology was developed, but an appropriate mutant has not yet been isolated. The ability to convert to stillage from biomass fermentations were determined to be suitable for anaerobic degradation and methane production. An economic model of a current sugar factory was developed in order to provide a baseline for the cost/benefit analysis of adding cellulosic ethanol production.

  1. Lipid-enhanced ethanol production from xylose by Pachysolen tannophilus

    SciTech Connect (OSTI)

    Dekker, R.F.H.

    1986-01-01

    This paper reports improved ethanol yields following the fermentation of xylose by a Pachysolen tannophilus strain when grown semi-aerobically in the presence of exogenous-added lipids. Profiles for ethanol production from 45 g/L xylose when grown on a medium containing ergosterol, linoleic acid, Tween-80, a mixture of the three lipids and no lipids (control) are presented. The enhancement in the amount of ethanol produced was most pronounced after 72 h fermentation.

  2. Assessments of biofuel sustainability: air pollution and health impacts

    E-Print Network [OSTI]

    Tsao, Chi-Chung

    2012-01-01

    of biodiesel and ethanol biofuels. Proc. Natl. Acad. Sci. U.Use of US croplands for biofuels increases greenhouse gasesovercome carbon savings from biofuels in Brazil. Proc. Natl.

  3. Elimination of hydrogenase post-translational modification blocks H2 production and increases ethanol yield in Clostridium thermocellum

    SciTech Connect (OSTI)

    Biswas, Ranjita; Zheng, Tianyong; Olson, Daniel G.; Lynd, Lee R; Guss, Adam M

    2015-01-01

    The native ability of Clostridium thermocellum to rapidly consume cellulose and produce ethanol makes it a leading candidate for a consolidated bioprocessing (CBP) biofuel production strategy. C. thermocellum also synthesizes lactate, formate, acetate, H2, and amino acids that compete with ethanol production for carbon and electrons. Elimination of H2 production could redirect carbon flux towards ethanol production by making more electrons available for acetyl-CoA reduction to ethanol. C. thermocellum encodes four hydrogenases and rather than delete each individually, we targeted a hydrogenase maturase gene (hydG), involved in converting the three [FeFe] hydrogenase apoenzymes into holoenzymes. Further deletion of the [NiFe] hydrogenase (ech) resulted in a mutant that functionally lacks all four hydrogenases. H2 production in hydG ech was undetectable and ethanol yield increased nearly 2-fold compared to wild type. Interestingly, mutant growth improved upon the addition of acetate, which led to increased expression of genes related to sulfate metabolism, suggesting these mutants may use sulfate as a terminal electron acceptor to balance redox reactions. Genomic analysis of hydG revealed a mutation in adhE, resulting in a strain with both NADH- and NADPH-dependent alcohol dehydrogenase activities. While this same adhE mutation is found in ethanol tolerant C. thermocellum strain E50C, hydG and hydG ech are not more ethanol tolerant than wild type, illustrating the complicated interactions between redox balancing and ethanol tolerance in C. thermocellum. The dramatic increase in ethanol production here suggests that targeting protein post-translational modification is a promising new approach for inactivation of multiple enzymes simultaneously for metabolic engineering.

  4. National Microalgae Biofuel Production Potential and Resource Demand

    SciTech Connect (OSTI)

    Wigmosta, Mark S.; Coleman, Andre M.; Skaggs, Richard; Huesemann, Michael H.; Lane, Leonard J.

    2011-04-14

    Microalgae continue to receive global attention as a potential sustainable "energy crop" for biofuel production. An important step to realizing the potential of algae is quantifying the demands commercial-scale algal biofuel production will place on water and land resources. We present a high-resolution national resource and oil production assessment that brings to bear fundamental research questions of where open pond microalgae production can occur, how much land and water resource is required, and how much energy is produced. Our study suggests under current technology microalgae have the potential to generate 220 billion liters/year of oil, equivalent to 48% of current U.S. petroleum imports for transportation fuels. However, this level of production would require 5.5% of the land area in the conterminous U.S., and nearly three times the volume of water currently used for irrigated agriculture, averaging 1,421 L water per L of oil. Optimizing the selection of locations for microalgae production based on water use efficiency can greatly reduce total water demand. For example, focusing on locations along the Gulf Coast, Southeastern Seaboard, and areas adjacent to the Great Lakes, shows a 75% reduction in water demand to 350 L per L of oil produced with a 67% reduction in land use. These optimized locations have the potential to generate an oil volume equivalent to 17% of imports for transportation fuels, equal to the Energy Independence and Security Act year 2022 "advanced biofuels" production target, and utilizing some 25% of the current irrigation consumptive water demand for the U. S. These results suggest that, with proper planning, adequate land and water are available to meet a significant portion of the U.S. renewable fuel goals.

  5. Ethanol: Producting Food, Feed, and Fuel

    Broader source: Energy.gov [DOE]

    At the August 7, 2008 joint quarterly Web conference of DOE's Biomass and Clean Cities programs, Todd Sneller (Nebraska Ethanol Board) discussed the food versus fuel issue.

  6. The U.S. Dry-Mill Ethanol Industry: Biobased Products and Bioenergy Initiative Success Stories

    SciTech Connect (OSTI)

    2009-10-28

    This fact sheet provides an overview of the history of ethanol production in the United States and describes innovations in dry-mill ethanol production.

  7. Low-Cost Hydrogen-from-Ethanol: A Distributed Production System...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low-Cost Hydrogen-from-Ethanol: A Distributed Production System (Presentation) Low-Cost Hydrogen-from-Ethanol: A Distributed Production System (Presentation) Presented at the 2007...

  8. A Pre-Treatment Model for Ethanol Production Using a Colorimetric...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    A Pre-Treatment Model for Ethanol Production Using a Colorimetric Analysis of Starch Solutions (1 Activity) A Pre-Treatment Model for Ethanol Production Using a Colorimetric...

  9. Development of Agave as a dedicated biomass source: production of biofuels from whole plants

    SciTech Connect (OSTI)

    Mielenz, Jonathan R; Mielenz, Jonathan R; Rodriguez Jr, Miguel; Thompson, Olivia A; Yang, Xiaohan; Yin, Hengfu

    2015-01-01

    Background: Agave species can grow well in semi-arid marginal agricultural lands around the world. Selected Agave species are used largely for alcoholic beverage production in Mexico. There are expanding research efforts to use the plentiful residues (bagasse) for ethanol production as the beverage manufacturing process only uses the juice from the central core of mature plants. Here we investigate the potential of over a dozen Agave species, including three from cold semi-arid regions of the United States, to produce biofuels using the whole plant. Results: Ethanol was readily produced by Saccharomyces cerevisiae from hydrolysate of ten whole Agaves with the use of a proper blend of biomass degrading enzymes that overcomes toxicity of most of the species tested. Unlike yeast fermentations, Clostridium beijerinckii produced butanol plus acetone from nine species tested. Butyric acid, a precursor of butanol, was also present due to incomplete conversion during the screening process. Since Agave contains high levels of free and poly-fructose which are readily destroyed by acidic pretreatment, a two step process was used developed to depolymerized poly-fructose while maintaining its fermentability. The hydrolysate from before and after dilute acid processing was used in C. beijerinckii acetone and butanol fermentations with selected Agave species. Conclusions: Results have shown Agave s potential to be a source of fermentable sugars beyond the existing beverage species to now include species previously unfermentable by yeast, including cold tolerant lines. This development may stimulate development of Agave as a dedicated feedstock for biofuels in semi-arid regions throughout the globe.

  10. Recombinant host cells and media for ethanol production

    DOE Patents [OSTI]

    Wood, Brent E; Ingram, Lonnie O; Yomano, Lorraine P; York, Sean W

    2014-02-18

    Disclosed are recombinant host cells suitable for degrading an oligosaccharide that have been optimized for growth and production of high yields of ethanol, and methods of making and using these cells. The invention further provides minimal media comprising urea-like compounds for economical production of ethanol by recombinant microorganisms. Recombinant host cells in accordance with the invention are modified by gene mutation to eliminate genes responsible for the production of unwanted products other than ethanol, thereby increasing the yield of ethanol produced from the oligosaccharides, relative to unmutated parent strains. The new and improved strains of recombinant bacteria are capable of superior ethanol productivity and yield when grown under conditions suitable for fermentation in minimal growth media containing inexpensive reagents. Systems optimized for ethanol production combine a selected optimized minimal medium with a recombinant host cell optimized for use in the selected medium. Preferred systems are suitable for efficient ethanol production by simultaneous saccharification and fermentation (SSF) using lignocellulose as an oligosaccharide source. The invention also provides novel isolated polynucleotide sequences, polypeptide sequences, vectors and antibodies.

  11. Lipid-enhanced ethanol production from xylose by Pachysolen tannophilus

    SciTech Connect (OSTI)

    Dekker, R.F.H.

    1986-04-01

    A number of different yeasts are now recognized as being capable of fermenting the pentose sugar, D-xylose, into ethanol. The most prominent among these are Pachysolen tannophilus and several Candida species. D-Xylose is found principally in lignocellulosic materials where it occurs as the main constitutent of the hemicellulosic xylans (1,4-..beta..-D-heteroxylans). With the exception of Candida XF-217, the conversion yields of xylose into ethanol for most yeasts were generally low (less than 70% of theoretical when grown on at least 50 g/l xylose). The low ethanol yields are attributable to a number of factors: 1) fermentation was not performed under conditions that maximize ethanol formation; 2) ethanol was not the major fermentation end-product, (e.g., acetic acid xylitol, and arabinitol are also known products, 3) ethanol toxicity; 4) ethanol is assimilated when the substrate becomes limiting; 4.8 and 5) osmotic sensitivity to high substrate levels, i.e. substrate inhibition. Attempts to increase ethanol yields of yeasts by adding exogenous lipids (e.g., oleic and linoleic acids, or ergosterol or its ester, lipid mixtures, or protein-lipid mixtures) to nutrient medium have succeeded in improving ethanol yields and also in reducing fermentation times. These lipids, when added to the nutrient medium, were incorporated into the yeast's cellular membrane. The protective action of these lipids was to alleviate the inhibitory effect of ethanol which then allowed the cells to tolerate higher ethanol levels. This communication reports on improved ethanol yields arising from the fermentation of xylose by a Pachysolen tannophilus strain when grown semi-aerobically in the presence of exogenous-added lipids. 17 references.

  12. Environmental indicators for sustainable production of algal biofuels

    SciTech Connect (OSTI)

    Efroymson, Rebecca Ann; Dale, Virginia H

    2014-01-01

    For analyzing sustainability of algal biofuels, we identify 16 environmental indicators that fall into six categories: soil quality, water quality and quantity, air quality, greenhouse gas emissions, biodiversity, and productivity. Indicators are selected to be practical, widely applicable, predictable in response, anticipatory of future changes, independent of scale, and responsive to management. Major differences between algae and terrestrial plant feedstocks, as well as their supply chains for biofuel, are highlighted, for they influence the choice of appropriate sustainability indicators. Algae strain selection characteristics do not generally affect which indicators are selected. The use of water instead of soil as the growth medium for algae determines the higher priority of water- over soil-related indicators. The proposed set of environmental indicators provides an initial checklist for measures of biofuel sustainability but may need to be modified for particular contexts depending on data availability, goals of the stakeholders, and financial constraints. Use of these indicators entails defining sustainability goals and targets in relation to stakeholder values in a particular context and can lead to improved management practices.

  13. An integrative modeling framework to evaluate the productivity and sustainability of biofuel crop production systems

    SciTech Connect (OSTI)

    Zhang, X [University of Maryland; Izaurralde, R. C. [University of Maryland; Manowitz, D. [University of Maryland; West, T. O. [University of Maryland; Thomson, A. M. [University of Maryland; Post, Wilfred M [ORNL; Bandaru, Vara Prasad [ORNL; Nichols, Jeff [ORNL; Williams, J. [AgriLIFE, Temple, TX

    2010-10-01

    The potential expansion of biofuel production raises food, energy, and environmental challenges that require careful assessment of the impact of biofuel production on greenhouse gas (GHG) emissions, soil erosion, nutrient loading, and water quality. In this study, we describe a spatially explicit integrative modeling framework (SEIMF) to understand and quantify the environmental impacts of different biomass cropping systems. This SEIMF consists of three major components: (1) a geographic information system (GIS)-based data analysis system to define spatial modeling units with resolution of 56 m to address spatial variability, (2) the biophysical and biogeochemical model Environmental Policy Integrated Climate (EPIC) applied in a spatially-explicit way to predict biomass yield, GHG emissions, and other environmental impacts of different biofuel crops production systems, and (3) an evolutionary multiobjective optimization algorithm for exploring the trade-offs between biofuel energy production and unintended ecosystem-service responses. Simple examples illustrate the major functions of the SEIMF when applied to a nine-county Regional Intensive Modeling Area (RIMA) in SW Michigan to (1) simulate biofuel crop production, (2) compare impacts of management practices and local ecosystem settings, and (3) optimize the spatial configuration of different biofuel production systems by balancing energy production and other ecosystem-service variables. Potential applications of the SEIMF to support life cycle analysis and provide information on biodiversity evaluation and marginal-land identification are also discussed. The SEIMF developed in this study is expected to provide a useful tool for scientists and decision makers to understand sustainability issues associated with the production of biofuels at local, regional, and national scales.

  14. An Integrative Modeling Framework to Evaluate the Productivity and Sustainability of Biofuel Crop Production Systems

    SciTech Connect (OSTI)

    Zhang, Xuesong; Izaurralde, Roberto C.; Manowitz, David H.; West, T. O.; Post, W. M.; Thomson, Allison M.; Bandaru, V. P.; Nichols, J.; Williams, J.R.

    2010-09-08

    The potential expansion of biofuel production raises food, energy, and environmental challenges that require careful assessment of the impact of biofuel production on greenhouse gas (GHG) emissions, soil erosion, nutrient loading, and water quality. In this study, we describe a spatially-explicit integrative modeling framework (SEIMF) to understand and quantify the environmental impacts of different biomass cropping systems. This SEIMF consists of three major components: 1) a geographic information system (GIS)-based data analysis system to define spatial modeling units with resolution of 56 m to address spatial variability, 2) the biophysical and biogeochemical model EPIC (Environmental Policy Integrated Climate) applied in a spatially-explicit way to predict biomass yield, GHG emissions, and other environmental impacts of different biofuel crops production systems, and 3) an evolutionary multi-objective optimization algorithm for exploring the trade-offs between biofuel energy production and unintended ecosystem-service responses. Simple examples illustrate the major functions of the SEIMF when applied to a 9-county Regional Intensive Modeling Area (RIMA) in SW Michigan to 1) simulate biofuel crop production, 2) compare impacts of management practices and local ecosystem settings, and 3) optimize the spatial configuration of different biofuel production systems by balancing energy production and other ecosystem-service variables. Potential applications of the SEIMF to support life cycle analysis and provide information on biodiversity evaluation and marginal-land identification are also discussed. The SEIMF developed in this study is expected to provide a useful tool for scientists and decision makers to understand sustainability issues associated with the production of biofuels at local, regional, and national scales.

  15. %22Trojan Horse%22 strategy for deconstruction of biomass for biofuels production.

    SciTech Connect (OSTI)

    Simmons, Blake Alexander; Sinclair, Michael B.; Yu, Eizadora; Timlin, Jerilyn Ann; Hadi, Masood Z.; Tran-Gyamfi, Mary

    2011-02-01

    Production of renewable biofuels to displace fossil fuels currently consumed in the transportation sector is a pressing multiagency national priority (DOE/USDA/EERE). Currently, nearly all fuel ethanol is produced from corn-derived starch. Dedicated 'energy crops' and agricultural waste are preferred long-term solutions for renewable, cheap, and globally available biofuels as they avoid some of the market pressures and secondary greenhouse gas emission challenges currently facing corn ethanol. These sources of lignocellulosic biomass are converted to fermentable sugars using a variety of chemical and thermochemical pretreatments, which disrupt cellulose and lignin cross-links, allowing exogenously added recombinant microbial enzymes to more efficiently hydrolyze the cellulose for 'deconstruction' into glucose. This process is plagued with inefficiencies, primarily due to the recalcitrance of cellulosic biomass, mass transfer issues during deconstruction, and low activity of recombinant deconstruction enzymes. Costs are also high due to the requirement for enzymes and reagents, and energy-intensive cumbersome pretreatment steps. One potential solution to these problems is found in synthetic biology-engineered plants that self-produce a suite of cellulase enzymes. Deconstruction can then be integrated into a one-step process, thereby increasing efficiency (cellulose-cellulase mass-transfer rates) and reducing costs. The unique aspects of our approach are the rationally engineered enzymes which become Trojan horses during pretreatment conditions. During this study we rationally engineered Cazy enzymes and then integrated them into plant cells by multiple transformation techniques. The regenerated plants were assayed for first expression of these messages and then for the resulting proteins. The plants were then subjected to consolidated bioprocessing and characterized in detail. Our results and possible implications of this work on developing dedicated energy crops and their advantage in a consolidated bioprocessing system.

  16. PETRO: Higher Productivity Crops for Biofuels

    SciTech Connect (OSTI)

    2012-01-01

    PETRO Project: The 10 projects that comprise ARPA-E’s PETRO Project, short for “Plants Engineered to Replace Oil,” aim to develop non-food crops that directly produce transportation fuel. These crops can help supply the transportation sector with agriculturally derived fuels that are cost-competitive with petroleum and do not affect U.S. food supply. PETRO aims to redirect the processes for energy and carbon dioxide (CO2) capture in plants toward fuel production. This would create dedicated energy crops that serve as a domestic alternative to petroleum-based fuels and deliver more energy per acre with less processing prior to the pump.

  17. Predicting the adsorption of second generation biofuels by polymeric resins with applications for in situ product recovery (ISPR)

    E-Print Network [OSTI]

    Nielsen, David R.

    The application of hydrophobic polymeric resins as solid-phase adsorbent materials for the recovery and purification of prospective second generation biofuel compounds, including ethanol, iso-propanol, n-propanol, iso-butanol, ...

  18. Techno-Economic Analysis of Biochemical Scenarios for Production of Cellulosic Ethanol

    SciTech Connect (OSTI)

    Kazi, F. K.; Fortman, J.; Anex, R.; Kothandaraman, G.; Hsu, D.; Aden, A.; Dutta, A.

    2010-06-01

    A techno-economic analysis on the production of cellulosic ethanol by fermentation was conducted to understand the viability of liquid biofuel production processes within the next 5-8 years. Initially, 35 technologies were reviewed, then a two-step down selection was performed to choose scenarios to be evaluated in a more detailed economic analysis. The lignocellulosic ethanol process was selected because it is well studied and portions of the process have been tested at pilot scales. Seven process variations were selected and examined in detail. Process designs were constrained to public data published in 2007 or earlier, without projecting for future process improvements. Economic analysis was performed for an 'nth plant' (mature technology) to obtain total investment and product value (PV). Sensitivity analysis was performed on PV to assess the impact of variations in process and economic parameters. Results show that the modeled dilute acid pretreatment process without any downstream process variation had the lowest PV of $3.40/gal of ethanol ($5.15/gallon of gasoline equivalent) in 2007 dollars. Sensitivity analysis shows that PV is most sensitive to feedstock and enzyme costs.

  19. Microorganisms to Speed Production of Biofuels - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on darkMicroorganisms to Speed Production of Biofuels Oak Ridge

  20. Comparison of ethanol production by different Zymomonas strains

    SciTech Connect (OSTI)

    Skotnicki, M.L.; Lee, K.J.; Tribe, D.E.; Rogers, P.L.

    1981-04-01

    A comparison of the rates of growth and ethanol production by 11 different strains of Zymomonas revealed a wide range of characteristics, with some strains being more tolerant of high sugar or ethanol concentrations and high incubation temperatures than others. Some strains were unable to utilize sucrose; others produced large amounts of levan, and one strain grew well but produced no levan. One strain, CP4, was considerably better in all respects than most of the other strains and was chosen as a starting strain for genetic improvement of ethanol production.

  1. Uncertainty in techno-economic estimates of cellulosic ethanol production due to experimental measurement uncertainty

    E-Print Network [OSTI]

    Vicari, Kristin Jenise

    Abstract Background Cost-effective production of lignocellulosic biofuels remains a major financial and technical challenge at the industrial scale. A critical tool in biofuels process development is the techno-economic ...

  2. Technical Feasibility Study on Biofuels Production from Pyrolysis of Nannochloropsis oculata and Algal Bio-oil Upgrading 

    E-Print Network [OSTI]

    Maguyon, Monet

    2013-12-02

    Increasing environmental concerns over greenhouse gas emissions, depleting petroleum reserves and rising oil prices has stimulated interest on biofuels production from biomass sources. This study explored on biofuels production from pyrolysis...

  3. Biofuel Production Initiative at Claflin University Final Report

    SciTech Connect (OSTI)

    Chowdhury, Kamal

    2011-07-20

    For US transportation fuel independence or reduced dependence on foreign oil, the Federal Government has mandated that the country produce 36 billion gallons (bg) of renewable transportation fuel per year for its transportation fuel supply by 2022. This can be achieved only if development of efficient technology for second generation biofuel from ligno-cellulosic sources is feasible. To be successful in this area, development of a widely available, renewable, cost-effective ligno-cellulosic biomass feedstock that can be easily and efficiently converted biochemically by bacteria or other fast-growing organisms is required. Moreover, if the biofuel type is butanol, then the existing infrastructure to deliver fuel to the customer can be used without additional costs and retrofits. The Claflin Biofuel Initiative project is focused on helping the US meet the above-mentioned targets. With support from this grant, Claflin University (CU) scientists have created over 50 new strains of microorganisms that are producing butanol from complex carbohydrates and cellulosic compounds. Laboratory analysis shows that a number of these strains are producing higher percentages of butanol than other methods currently in use. All of these recombinant bacterial strains are producing relatively high concentrations of acetone and numerous other byproducts as well. Therefore, we are carrying out intense mutations in the selected strains to reduce undesirable byproducts and increase the desired butanol production to further maximize the yield of butanol. We are testing the proof of concept of producing pre-industrial large scale biobutanol production by utilizing modifications of currently commercially available fermentation technology and instrumentation. We have already developed an initial process flow diagram (PFD) and selected a site for a biobutanol pilot scale facility in Orangeburg, SC. With the recent success in engineering new strains of various biofuel producing bacteria at CU, it will soon be possible to provide other technical information for the development of process flow diagrams (PFD’s) and piping and instrumentation diagrams (P&ID’s). This information can be used for the equipment layout and general arrangement drawings for the proposed process and eventual plant. An efficient bio-butanol pilot plant to convert ligno-cellulosic biomass feedstock from bagasse and wood chips will create significant number of green jobs for the Orangeburg, SC community that will be environmentally-friendly and generate much-needed income for farmers in the area.

  4. Simultaneous cell growth and ethanol production from cellulose by an engineered yeast consortium displaying a functional mini-cellulosome

    E-Print Network [OSTI]

    Goyal, Garima; Tsai, Shen-Long; Madan, Bhawna; DaSilva, Nancy A; Chen, Wilfred

    2011-01-01

    Cellulase, clostridia, and ethanol. Microbiol Mol Biol RevNext- generation cellulosic ethanol technologies and theirProduction of cellulosic ethanol in Saccharomyces cerevisiae

  5. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2011-01-01

    OF CELLULOSE AND PRODUCTION OF ETHANOL under auspices of22 Mohammad Riaz ETHANOL FERMENTATION STUDIES II I. A. B.Hydrolyzates to Ethanol J2 Ren-Der Yang

  6. Energy, Carbon Dioxide and Water Use Implications of Hydrous Ethanol Production

    E-Print Network [OSTI]

    Saffy, Howard A.; Northrop, William; Kittelson, David; Boies, Adam M.

    2015-08-24

    than anhydrous ethanol. In this study, we investigate corn ethanol production from a dry-mill, natural gas-fired corn ethanol refinery, producing ethanol with a range of ethanol concentrations from 58°wt% - 100°wt% to determine the effect on energy use...

  7. Methods for increasing the production of ethanol from microbial fermentation

    DOE Patents [OSTI]

    Gaddy, James L. (Fayetteville, AR); Arora, Dinesh K. (Fayetteville, AR); Ko, Ching-Whan (Fayetteville, AR); Phillips, John Randall (Fayetteville, AR); Basu, Rahul (Bethlehem, PA); Wikstrom, Carl V. (Fayetteville, AR); Clausen, Edgar C. (Fayetteville, AR)

    2007-10-23

    A stable continuous method for producing ethanol from the anaerobic bacterial fermentation of a gaseous substrate containing at least one reducing gas involves culturing a fermentation bioreactor anaerobic, acetogenic bacteria in a liquid nutrient medium; supplying the gaseous substrate to the bioreactor; and manipulating the bacteria in the bioreactor by reducing the redox potential, or increasing the NAD(P)H TO NAD(P) ratio, in the fermentation broth after the bacteria achieves a steady state and stable cell concentration in the bioreactor. The free acetic acid concentration in the bioreactor is maintained at less than 5 g/L free acid. This method allows ethanol to be produced in the fermentation broth in the bioreactor at a productivity greater than 10 g/L per day. Both ethanol and acetate are produced in a ratio of ethanol to acetate ranging from 1:1 to 20:1.

  8. Biofuels: Review of Policies and Impacts

    E-Print Network [OSTI]

    Janda, Karel; Kristoufek, Ladislav; Zilberman, David

    2011-01-01

    the biofuel production and consumption exhibited signi?cantBiofuels The biofuels production and consumption is closelysystem of the fuel production and consumption beginning with

  9. ON THE INDIRECT EFFECT OF BIOFUEL

    E-Print Network [OSTI]

    Zilberman, D; Barrows, G; Hochman, G; Rajagopal, D

    2013-01-01

    chain. Assume that biofuel production includes two stages:the ILUC of biofuel production in the LCA assessment. Theof their output to biofuel production. For simplicity, we

  10. Comparing Scales of Environmental Effects from Gasoline and Ethanol Production

    SciTech Connect (OSTI)

    Parish, Esther S; Kline, Keith L; Dale, Virginia H; Efroymson, Rebecca Ann; McBride, Allen; Johnson, Timothy L; Hilliard, Michael R; Bielicki, Dr Jeffrey M

    2013-01-01

    Understanding the environmental effects of alternative fuel production is critical to characterizing the sustainability of energy resources to inform policy and regulatory decisions. The magnitudes of these environmental effects vary according to the intensity and scale of fuel production along each step of the supply chain. We compare the scales (i.e., spatial extent and temporal duration) of ethanol and gasoline production processes and environmental effects based on a literature review, and then synthesize the scale differences on space-time diagrams. Comprehensive assessment of any fuel-production system is a moving target, and our analysis shows that decisions regarding the selection of spatial and temporal boundaries of analysis have tremendous influences on the comparisons. Effects that strongly differentiate gasoline and ethanol supply chains in terms of scale are associated with when and where energy resources are formed and how they are extracted. Although both gasoline and ethanol production may result in negative environmental effects, this study indicates that ethanol production traced through a supply chain may impact less area and result in more easily reversed effects of a shorter duration than gasoline production.

  11. Carbon Accounting and Economic Model Uncertainty of Emissions from Biofuels-Induced Land Use Change

    E-Print Network [OSTI]

    Plevin, Richard J; Beckman, Jayson; Golub, Alla A; Witcover, Julie; O'??Hare, Michael

    2015-01-01

    of U.S. Croplands for Biofuels Increases Greenhouse GasesLife-Cycle Assessment of Biofuels. Environmental Science &cellulosic ethanol. Biotechnol Biofuels 6 (1), 51. Elliott,

  12. Use of tamarisk as a potential feedstock for biofuel production.

    SciTech Connect (OSTI)

    Sun, Amy Cha-Tien; Norman, Kirsten

    2011-01-01

    This study assesses the energy and water use of saltcedar (or tamarisk) as biomass for biofuel production in a hypothetical sub-region in New Mexico. The baseline scenario consists of a rural stretch of the Middle Rio Grande River with 25% coverage of mature saltcedar that is removed and converted to biofuels. A manufacturing system life cycle consisting of harvesting, transportation, pyrolysis, and purification is constructed for calculating energy and water balances. On a dry short ton woody biomass basis, the total energy input is approximately 8.21 mmBTU/st. There is potential for 18.82 mmBTU/st of energy output from the baseline system. Of the extractable energy, approximately 61.1% consists of bio-oil, 20.3% bio-char, and 18.6% biogas. Water consumptive use by removal of tamarisk will not impact the existing rate of evapotranspiration. However, approximately 195 gal of water is needed per short ton of woody biomass for the conversion of biomass to biocrude, three-quarters of which is cooling water that can be recovered and recycled. The impact of salt presence is briefly assessed. Not accounted for in the baseline are high concentrations of Calcium, Sodium, and Sulfur ions in saltcedar woody biomass that can potentially shift the relative quantities of bio-char and bio-oil. This can be alleviated by a pre-wash step prior to the conversion step. More study is needed to account for the impact of salt presence on the overall energy and water balance.

  13. Metabolic engineering of microorganisms for biofuels production: from bugs to synthetic biology to fuels

    SciTech Connect (OSTI)

    Kuk Lee, Sung; Chou, Howard; Ham, Timothy S.; Soon Lee, Taek; Keasling, Jay D.

    2009-12-02

    The ability to generate microorganisms that can produce biofuels similar to petroleum-based transportation fuels would allow the use of existing engines and infrastructure and would save an enormous amount of capital required for replacing the current infrastructure to accommodate biofuels that have properties significantly different from petroleum-based fuels. Several groups have demonstrated the feasibility of manipulating microbes to produce molecules similar to petroleum-derived products, albeit at relatively low productivity (e.g. maximum butanol production is around 20 g/L). For cost-effective production of biofuels, the fuel-producing hosts and pathways must be engineered and optimized. Advances in metabolic engineering and synthetic biology will provide new tools for metabolic engineers to better understand how to rewire the cell in order to create the desired phenotypes for the production of economically viable biofuels.

  14. COMPUTATIONAL RESOURCES FOR BIOFUEL FEEDSTOCK SPECIES

    SciTech Connect (OSTI)

    Buell, Carol Robin [Michigan State University; Childs, Kevin L [Michigan State University

    2013-05-07

    While current production of ethanol as a biofuel relies on starch and sugar inputs, it is anticipated that sustainable production of ethanol for biofuel use will utilize lignocellulosic feedstocks. Candidate plant species to be used for lignocellulosic ethanol production include a large number of species within the Grass, Pine and Birch plant families. For these biofuel feedstock species, there are variable amounts of genome sequence resources available, ranging from complete genome sequences (e.g. sorghum, poplar) to transcriptome data sets (e.g. switchgrass, pine). These data sets are not only dispersed in location but also disparate in content. It will be essential to leverage and improve these genomic data sets for the improvement of biofuel feedstock production. The objectives of this project were to provide computational tools and resources for data-mining genome sequence/annotation and large-scale functional genomic datasets available for biofuel feedstock species. We have created a Bioenergy Feedstock Genomics Resource that provides a web-based portal or �clearing house� for genomic data for plant species relevant to biofuel feedstock production. Sequence data from a total of 54 plant species are included in the Bioenergy Feedstock Genomics Resource including model plant species that permit leveraging of knowledge across taxa to biofuel feedstock species.We have generated additional computational analyses of these data, including uniform annotation, to facilitate genomic approaches to improved biofuel feedstock production. These data have been centralized in the publicly available Bioenergy Feedstock Genomics Resource (http://bfgr.plantbiology.msu.edu/).

  15. Transportation Biofuels in the US A Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    a greater focus on specific biofuel production technologies.differences for certain biofuel feedstocks as well as policy24 Biofuel

  16. Transportation Biofuels in the USA Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    a greater focus on specific biofuel production technologies.differences for certain biofuel feedstocks as well as policy24 Biofuel

  17. Quantifying the climate impacts of albedo changes due to biofuel production: a comparison with biogeochemical effects

    E-Print Network [OSTI]

    Caiazzo, Fabio

    Lifecycle analysis is a tool widely used to evaluate the climate impact of greenhouse gas emissions attributable to the production and use of biofuels. In this paper we employ an augmented lifecycle framework that includes ...

  18. at Western University From the production of biofuels, fuel cells and alternative forms of energy,

    E-Print Network [OSTI]

    Lennard, William N.

    at Western University From the production of biofuels, fuel cells and alternative forms of energy tailored nanotube- based materials for applications in such areas as fuel cells, batteries and sensing

  19. Risks to global biodiversity from fossil-fuel production exceed those from biofuel production

    SciTech Connect (OSTI)

    Dale, Virginia H; Parish, Esther S; Kline, Keith L

    2015-01-01

    Potential global biodiversity impacts from near-term gasoline production are compared to biofuel, a renewable liquid transportation fuel expected to substitute for gasoline in the near term (i.e., from now until c. 2030). Petroleum exploration activities are projected to extend across more than 5.8 billion ha of land and ocean worldwide (of which 3.1 billion is on land), much of which is in remote, fragile terrestrial ecosystems or off-shore oil fields that would remain relatively undisturbed if not for interest in fossil fuel production. Future biomass production for biofuels is projected to fall within 2.0 billion ha of land, most of which is located in areas already impacted by human activities. A comparison of likely fuel-source areas to the geospatial distribution of species reveals that both energy sources overlap with areas with high species richness and large numbers of threatened species. At the global scale, future petroleum production areas intersect more than double the area and higher total number of threatened species than future biofuel production. Energy options should be developed to optimize provisioning of ecosystem services while minimizing negative effects, which requires information about potential impacts on critical resources. Energy conservation and identifying and effectively protecting habitats with high-conservation value are critical first steps toward protecting biodiversity under any fuel production scenario.

  20. Biofuels Information Center

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    biofuels production facilities and infrastructure by providing essential biofuels data, tools, and information to all stakeholders * The Bioenergy Atlas tools provide interactive...

  1. Ethanol production in fermentation of mixed sugars containing xylose

    DOE Patents [OSTI]

    Viitanen, Paul V. (West Chester, PA); Mc Cutchen, Carol M. (Wilmington, DE); Li; Xu (Newark, DE); Emptage, Mark (Wilmington, DE); Caimi, Perry G. (Kennett Square, PA); Zhang, Min (Lakewood, CO); Chou, Yat-Chen (Lakewood, CO); Franden, Mary Ann (Centennial, CO)

    2009-12-08

    Xylose-utilizing Z. mobilis strains were found to have improved ethanol production when grown in medium containing mixed sugars including xylose if sorbitol or mannitol was included in the medium. The effect was seen in concentrations of mixed sugars where no growth lag period occurs, as well as in higher sugars concentrations.

  2. Biofuel Boundaries: Estimating the Medium-Term Supply Potential of Domestic Biofuels

    E-Print Network [OSTI]

    Jones, Andrew; O'Hare, Michael; Farrell, Alexander

    2007-01-01

    sizable increases in biofuel production need not result ina reasonable level of biofuel production that avoids pushing26 Appendix A - Biofuel Production

  3. Response to "Ethanol Production and Gasoline Prices: A Spurious Correlation" by Knittel and Smith

    E-Print Network [OSTI]

    Rothman, Daniel

    Response to "Ethanol Production and Gasoline Prices: A Spurious Correlation" by Knittel and Smith Beardshear Hall, (515) 294-7612." #12;1 Response to "Ethanol Production and Gasoline Prices: A Spurious Relating Ethanol Production to Gasoline Prices" written by myself and Xiadong Du, and published in 2009

  4. Natural Oil Production from Microorganisms: Bioprocess and Microbe Engineering for Total Carbon Utilization in Biofuel Production

    SciTech Connect (OSTI)

    2010-07-15

    Electrofuels Project: MIT is using carbon dioxide (CO2) and hydrogen generated from electricity to produce natural oils that can be upgraded to hydrocarbon fuels. MIT has designed a 2-stage biofuel production system. In the first stage, hydrogen and CO2 are fed to a microorganism capable of converting these feedstocks to a 2-carbon compound called acetate. In the second stage, acetate is delivered to a different microorganism that can use the acetate to grow and produce oil. The oil can be removed from the reactor tank and chemically converted to various hydrocarbons. The electricity for the process could be supplied from novel means currently in development, or more proven methods such as the combustion of municipal waste, which would also generate the required CO2 and enhance the overall efficiency of MIT’s biofuel-production system.

  5. Can feedstock production for biofuels be sustainable in California?

    E-Print Network [OSTI]

    Kaffka, Stephen R.

    2009-01-01

    supply of ethanol and biodiesel for transportation. Current1 bil- lion gallons of biodiesel (primarily soy) and anothercellulosic sources Biodiesel Petroleum† et al. 2007). Some

  6. Development of a microbial process for the conversion of carbon dioxide and electricity to higher alcohols as biofuels

    E-Print Network [OSTI]

    Li, Han

    2013-01-01

    Li H, Cann AF, Liao JC: Biofuels: biomolecular engineeringthe predominant portion of biofuels produced currently, itof biodiesel and ethanol biofuels. Proc Natl Acad Sci U S A

  7. The effect of CO regulations on the cost of corn ethanol production

    E-Print Network [OSTI]

    Kammen, Daniel M.

    The effect of CO 2 regulations on the cost of corn ethanol production This article has been) 024003 (9pp) doi:10.1088/1748-9326/3/2/024003 The effect of CO2 regulations on the cost of corn ethanol the effect of CO2 price on the effective cost of ethanol production we have developed a model that integrates

  8. Screening Prosopis (Mesquite or Algarrobo) for Biofuel Production on Semiarid Lands1

    E-Print Network [OSTI]

    Screening Prosopis (Mesquite or Algarrobo) for Biofuel Production on Semiarid Lands1 Peter Felker of Prosopis have been screened in field experiments for biomass production, frost tolerance, and heat with 600 mm total water applica- tion. Dry matter production of 14,000 kg/ha has been obtained at projected

  9. NREL's Cyanobacteria Engineering Shortens Biofuel Production Process, Captures CO2

    SciTech Connect (OSTI)

    2015-09-01

    This highlight describes NREL's work to systematically analyze the flow of energy in a photosynthetic microbe and show how the organism adjusts its metabolism to meet the increased energy demand for making ethylene. This work successfully demonstrates that the organism could cooperate by stimulating photosynthesis. The results encourage further genetic engineering for the conversion of CO2 to biofuels and chemicals. This highlight is being developed for the September 2015 Alliance S&T Board meeting. biofuels and chemicals. This highlight is being developed for the September 2015 Alliance S&T Board meeting.

  10. Author's personal copy Distributed hydrogen production from ethanol in a microfuel processor

    E-Print Network [OSTI]

    Khandekar, Sameer

    Author's personal copy Distributed hydrogen production from ethanol in a microfuel processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525 2. Methods of hydrogen production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525 2.4. Bio-hydrogen

  11. Transcriptome sequencing and annotation of the microalgae Dunaliella tertiolecta: Pathway description and gene discovery for production of next-generation biofuels

    E-Print Network [OSTI]

    Rismani-Yazdi, Hamid

    Background Biodiesel or ethanol derived from lipids or starch produced by microalgae may overcome many of the sustainability challenges previously ascribed to petroleum-based fuels and first generation plant-based biofuels. ...

  12. World Biofuels Study

    SciTech Connect (OSTI)

    Alfstad,T.

    2008-10-01

    This report forms part of a project entitled 'World Biofuels Study'. The objective is to study world biofuel markets and to examine the possible contribution that biofuel imports could make to help meet the Renewable Fuel Standard (RFS) of the Energy Independence and Security Act of 2007 (EISA). The study was sponsored by the Biomass Program of the Assistant Secretary for Energy Efficiency and Renewable Energy (EERE), U.S. Department of Energy. It is a collaborative effort among the Office of Policy and International Affairs (PI), Department of Energy and Oak Ridge National Laboratory (ORNL), National Renewable Energy Laboratory (NREL) and Brookhaven National Laboratory (BNL). The project consisted of three main components: (1) Assessment of the resource potential for biofuel feedstocks such as sugarcane, grains, soybean, palm oil and lignocellulosic crops and development of supply curves (ORNL). (2) Assessment of the cost and performance of biofuel production technologies (NREL). (3) Scenario-based analysis of world biofuel markets using the ETP global energy model with data developed in the first parts of the study (BNL). This report covers the modeling and analysis part of the project conducted by BNL in cooperation with PI. The Energy Technology Perspectives (ETP) energy system model was used as the analytical tool for this study. ETP is a 15 region global model designed using the MARKAL framework. MARKAL-based models are partial equilibrium models that incorporate a description of the physical energy system and provide a bottom-up approach to study the entire energy system. ETP was updated for this study with biomass resource data and biofuel production technology cost and performance data developed by ORNL and NREL under Tasks 1 and 2 of this project. Many countries around the world are embarking on ambitious biofuel policies through renewable fuel standards and economic incentives. As a result, the global biofuel demand is expected to grow very rapidly over the next two decades, provided policymakers stay the course with their policy goals. This project relied on a scenario-based analysis to study global biofuel markets. Scenarios were designed to evaluate the impact of different policy proposals and market conditions. World biofuel supply for selected scenarios is shown in Figure 1. The reference case total biofuel production increases from 12 billion gallons of ethanol equivalent in 2005 to 54 billion gallons in 2020 and 83 billion gallons in 2030. The scenarios analyzed show volumes ranging from 46 to 64 billion gallons in 2020, and from about 72 to about 100 billion gallons in 2030. The highest production worldwide occurs in the scenario with high feedstock availability combined with high oil prices and more rapid improvements in cellulosic biofuel conversion technologies. The lowest global production is found in the scenario with low feedstock availability, low oil prices and slower technology progress.

  13. Bio-Fuel Production Assisted with High Temperature Steam Electrolysis

    SciTech Connect (OSTI)

    Grant Hawkes; James O'Brien; Michael McKellar

    2012-06-01

    Two hybrid energy processes that enable production of synthetic liquid fuels that are compatible with the existing conventional liquid transportation fuels infrastructure are presented. Using biomass as a renewable carbon source, and supplemental hydrogen from high-temperature steam electrolysis (HTSE), these two hybrid energy processes have the potential to provide a significant alternative petroleum source that could reduce dependence on imported oil. The first process discusses a hydropyrolysis unit with hydrogen addition from HTSE. Non-food biomass is pyrolyzed and converted to pyrolysis oil. The pyrolysis oil is upgraded with hydrogen addition from HTSE. This addition of hydrogen deoxygenates the pyrolysis oil and increases the pH to a tolerable level for transportation. The final product is synthetic crude that could then be transported to a refinery and input into the already used transportation fuel infrastructure. The second process discusses a process named Bio-Syntrolysis. The Bio-Syntrolysis process combines hydrogen from HTSE with CO from an oxygen-blown biomass gasifier that yields syngas to be used as a feedstock for synthesis of liquid synthetic crude. Conversion of syngas to liquid synthetic crude, using a biomass-based carbon source, expands the application of renewable energy beyond the grid to include transportation fuels. It can also contribute to grid stability associated with non-dispatchable power generation. The use of supplemental hydrogen from HTSE enables greater than 90% utilization of the biomass carbon content which is about 2.5 times higher than carbon utilization associated with traditional cellulosic ethanol production. If the electrical power source needed for HTSE is based on nuclear or renewable energy, the process is carbon neutral. INL has demonstrated improved biomass processing prior to gasification. Recyclable biomass in the form of crop residue or energy crops would serve as the feedstock for this process. A process model of syngas production using high temperature electrolysis and biomass gasification is presented. Process heat from the biomass gasifier is used to heat steam for the hydrogen production via the high temperature steam electrolysis process. Oxygen produced form the electrolysis process is used to control the oxidation rate in the oxygen-blown biomass gasifier.

  14. Cellulosic Biomass Feedstocks and Logistics for Ethanol Production

    SciTech Connect (OSTI)

    J. Richard Hess; Christopher T. Wright; Kevin L. Kenney

    2007-10-01

    The economic competitiveness of cellulosic ethanol production is highly dependent on feedstock cost, which constitutes 35–50% of the total ethanol production cost, depending on various geographical factors and the types of systems used for harvesting, collecting, preprocessing, transporting, and handling the material. Consequently, as the deployment of cellulosic ethanol biorefi neries approaches, feedstock cost and availability are the driving factors that infl uence pioneer biorefi nery locations and will largely control the rate at which this industry grows. Initial scenarios were postulated to develop a pioneer dry feedstock supply system design case as a demonstration of the current state of technology. Based on this pioneer design, advanced scenarios were developed to determine key cost barriers, needed supply system improvements, and technology advancements to achieve government and private sector cost targets. Analysis of the pioneer supply system resulted in a delivered feedstock cost to the throat of the pretreatment reactor of $37.00 per dry tonne (2002 $). Pioneer supply systems will start by using current infrastructure and technologies and be individually designed for biorefi neries using specifi c feedstock types and varieties based on local geographic conditions. As the industry develops and cost barriers are addressed, the supply systems will incorporate advanced technologies that will eliminate downstream diversity and provide a uniform, tailored feedstock for multiple biorefi neries located in different regions.

  15. Energy Policy 35 (2007) 35503570 Biofuels: What a Biopact between North and South could achieve

    E-Print Network [OSTI]

    2007-01-01

    , Australia Received 21 December 2006; accepted 5 February 2007 Available online 27 March 2007 Abstract-intensive cultivation in the North is broken, and a quite different scenario involving production in the South addressed. r 2007 Published by Elsevier Ltd. Keywords: Biofuels; Ethanol; Biopact Ethanol produced in Brazil

  16. Impacts of Ethanol on Anaerobic Production of Tert-Butyl Alcohol (TBA) from Methyl Tert-Butyl Ether (MTBE) in Groundwater

    E-Print Network [OSTI]

    Scow, K M; MacKay, Douglas

    2008-01-01

    Project title: Impacts of Ethanol on Anaerobic Production oftert-butanol (TBA). As ethanol is being promoted as ainvestigate the effect of ethanol release on existing MTBE

  17. Recombinant yeast with improved ethanol tolerance and related methods of use

    DOE Patents [OSTI]

    Gasch, Audrey P. (Madison, WI); Lewis, Jeffrey A. (Madison, WI)

    2012-05-15

    The present invention provides isolated Elo1 and Mig3 nucleic acid sequences capable of conferring increased ethanol tolerance on recombinant yeast and methods of using same in biofuel production, particularly ethanol production. Methods of bioengineering yeast using the Elo1 and, or, Mig3 nucleic acid sequences are also provided.

  18. Application of monoclonal antibodies to investigate plant cell wall deconstruction for biofuels production

    E-Print Network [OSTI]

    California at Riverside, University of

    Application of monoclonal antibodies to investigate plant cell wall deconstruction for biofuels production Jaclyn D. DeMartini,abe Sivakumar Pattathil,ce Utku Avci,ce Kaitlyn Szekalski,c Koushik Mazumder Lignocellulosic biomass is the only sustainable resource for large-scale production of liquid transportation fuel

  19. Water Footprints of Cassava- and Molasses-Based Ethanol Production in Thailand

    SciTech Connect (OSTI)

    Mangmeechai, Aweewan; Pavasant, Prasert

    2013-12-15

    The Thai government has been promoting renewable energy as well as stimulating the consumption of its products. Replacing transport fuels with bioethanol will require substantial amounts of water and enhance water competition locally. This study shows that the water footprint (WF) of molasses-based ethanol is less than that of cassava-based ethanol. The WF of molasses-based ethanol is estimated to be in the range of 1,510-1,990 L water/L ethanol, while that of cassava-based ethanol is estimated at 2,300-2,820 L water/L ethanol. Approximately 99% of the water in each of these WFs is used to cultivate crops. Ethanol production requires not only substantial amounts of water but also government interventions because it is not cost competitive. In Thailand, the government has exploited several strategies to lower ethanol prices such as oil tax exemptions for consumers, cost compensation for ethanol producers, and crop price assurances for farmers. For the renewable energy policy to succeed in the long run, the government may want to consider promoting molasses-based ethanol production as well as irrigation system improvements and sugarcane yield-enhancing practices, since molasses-based ethanol is more favorable than cassava-based ethanol in terms of its water consumption, chemical fertilizer use, and production costs.

  20. Study of the Enzymatic Hydrolysis of Cellulose for Production of Fuel Ethanol

    E-Print Network [OSTI]

    California at Riverside, University of

    Study of the Enzymatic Hydrolysis of Cellulose for Production of Fuel Ethanol by the Simultaneous to ethanol, a promising alternative fuel, can be carried out efficiently and economically using-glucosidase, with the fermentative synthesis of ethanol. Because the enzymatic step determines the availability of glucose

  1. Assessments of biofuel sustainability: air pollution and health impacts

    E-Print Network [OSTI]

    Tsao, Chi-Chung

    2012-01-01

    costs and benefits of biodiesel and ethanol biofuels. Proc.History and policy of biodiesel in Brazil. Energy Policyincluding ethanol and biodiesel is expected to grow rapidly

  2. Model estimates food-versus-biofuel trade-off

    E-Print Network [OSTI]

    Rajagapol, Deepak; Sexton, Steven; Hochman, Gal; Roland-Holst, David; Zilberman, David D

    2009-01-01

    associ- ated with biofuel production and model the effectspolicymakers blame biofuel production mandates for the foodfood crisis struck as biofuel production, driven largely by

  3. The effect of biofuel on the international oil market

    E-Print Network [OSTI]

    Hochman, Gal; Rajagopal, Deepak; Zilberman, David D.

    2010-01-01

    and estimate that biofuel production in 2007 increased fuelcompetitive. About 50% of biofuel production costs come fromelasticity is above 8.5, biofuel production meets the RFS2

  4. Transportation Biofuels in the USA Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    focus on specific biofuel production technologies. The nextinterested in. If the biofuel production technology itselffor existing and new biofuel production technologies. Their

  5. The Economics of Trade, Biofuel, and the Environment

    E-Print Network [OSTI]

    Hochman, Gal; Sexton, Steven; Zilberman, David D.

    2010-01-01

    agriculture and in biofuel production that improve feedstockagricultural or biofuel production, requires a tax paymentemissions from biofuel production increases. Therefore, the

  6. Creating Markets for Green Biofuels: Measuring and improving environmental performance

    E-Print Network [OSTI]

    Turner, Brian T.; Plevin, Richard J.; O'Hare, Michael; Farrell, Alexander E.

    2007-01-01

    case studies of specific biofuel production pathways using aenvironmental impacts of biofuel production and use are notimpacts. In addition, biofuel production facilities can use

  7. Engineering microbial biofuel tolerance and export using efflux pumps

    E-Print Network [OSTI]

    Dunlop, Mary

    2012-01-01

    pathways for biofuel production because the engineeredincrease the yield of a biofuel production strain. Resultsalso enhanced biofuel production. Two pumps consistently

  8. Assessments of biofuel sustainability: air pollution and health impacts

    E-Print Network [OSTI]

    Tsao, Chi-Chung

    2012-01-01

    the indirect effects of biofuel production on biodiversity:to incremental Brazilian biofuel production of 39 billionChair Accelerating biofuel production has been promoted as

  9. Energy and Greenhouse Impacts of Biofuels: A Framework for Analysis

    E-Print Network [OSTI]

    Kammen, Daniel M.; Farrell, Alexander E.; Plevin, Richard J.; Jones, Andrew D.; Nemet, Gregory F.; Delucchi, Mark A.

    2008-01-01

    The rapid rise in biofuel production is driven by governmentprices. Globally, biofuel production is dominated bysoybeans) and current biofuel production processes are many

  10. Genetic and biotechnological approaches for biofuel crop improvement.

    E-Print Network [OSTI]

    Vega-Sánchez, Miguel E; Ronald, Pamela C

    2010-01-01

    engineering for biofuel production: towards affordablebiomass feedstocks for biofuel production. Genome Biol 2008,sugar yields for biofuel production. Nat Biotechnol 2007,

  11. Spectral optical properties of selected photosynthetic microalgae producing biofuels

    E-Print Network [OSTI]

    Lee, Euntaek; Heng, Ri-Liang; Pilon, Laurent

    2013-01-01

    2 fixation and biofuel production”, Journal of Quantitativeunder open raceway pond for biofuel production”, Bioresourceof microalgae for biofuel production be- tween 400 and 750

  12. Transportation Biofuels in the US A Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    focus on specific biofuel production technologies. The nextinterested in. If the biofuel production technology itselffor existing and new biofuel production technologies. Their

  13. Conversion Technologies for Advanced Biofuels - Carbohydrates...

    Energy Savers [EERE]

    More Documents & Publications Conversion Technologies for Advanced Biofuels - Carbohydrates Production Advanced Conversion Roadmap Workshop Innovative Topics for Advanced Biofuels...

  14. Biofuels' Time of Transition Achieving high performance in a world

    E-Print Network [OSTI]

    Kammen, Daniel M.

    the challenges of 2007, biofuels production will probably exceed the International Energy Agency predictions was approximately 20 percent in the United States and approxi- mately 30 percent in Germany.1 ·High and volatile increase).2 ·Low product prices. Ethanol spot prices went from a high of $4/gallon in 2006 to an average

  15. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    Synthesis of three advanced biofuels from ionic liquid-Synthesis of three advanced biofuels from ionic liquid-C. Somerville. 2009. Cellulosic biofuels. Annual review of

  16. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    of second generation biofuel technologies. Bioresourceas biocatalysts in the biofuel industry. Advances in appliedas biocatalysts in the biofuel industry. Adv Appl Microbiol

  17. Ethanol production using a soy hydrolysate-based medium or a yeast autolysate-based medium

    DOE Patents [OSTI]

    Ingram, Lonnie O. (Gainesville, FL)

    2000-01-01

    This invention presents a method for the production of ethanol that utilizes a soy hydrolysate-based nutrient medium or a yeast autolysate-based medium nutrient medium in conjunction with ethanologenic bacteria and a fermentable sugar for the cost-effective production of ethanol from lignocellulosic biomass. The invention offers several advantages over presently available media for use in ethanol production, including consistent quality, lack of toxins and wide availability.

  18. Method for producing ethanol and co-products from cellulosic biomass

    DOE Patents [OSTI]

    Nguyen, Quang A

    2013-10-01

    The present invention generally relates to processes for production of ethanol from cellulosic biomass. The present invention also relates to production of various co-products of preparation of ethanol from cellulosic biomass. The present invention further relates to improvements in one or more aspects of preparation of ethanol from cellulosic biomass including, for example, improved methods for cleaning biomass feedstocks, improved acid impregnation, and improved steam treatment, or "steam explosion."

  19. future science group 9ISSN 1759-726910.4155/BFS.11.151 2012 Future Science Ltd Synthetic biology approaches to biofuel production

    E-Print Network [OSTI]

    Hasty, Jeff

    approaches to biofuel production Editorial Biofuels (2012) 3(1), 9­12 "...it is important for synthetic will focus on the use of synthetic biology to engineer organisms for the more efficient production of biofuel over the current production level of about 13 billion gallons [1]. Given the expanding mar- ket

  20. Growing the renewable chemicals and advanced biofuels cluster in MN

    E-Print Network [OSTI]

    Levinson, David M.

    Growing the renewable chemicals and advanced biofuels cluster in MN #12;Renewable Chemical Value% Reduction 60% Reduction 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Gasoline Corn Ethanol Advanced Biofuel Cellulosic Biofuel Corn Ethanol 20% GHG Reduction Compared to gasoline: Advanced Biofuel 50% GHG Reduction e

  1. Supramolecular self-assembled chaos: polyphenolic lignin's barrier to cost-effective lignocellulosic biofuels

    E-Print Network [OSTI]

    Achyuthan, Komandoor

    2014-01-01

    thereby  cost-­? effective  biofuels  production.   PMID:  effective  lignocellulosic  biofuels.   Achyuthan  KE,  effective   lignocellulosic  biofuels.  Post-­?synthesis  

  2. EA-1940: Proposed Federal Loan Guarantee for Montana Advanced Biofuels

    Broader source: Energy.gov [DOE]

    Montana Advanced Biofuels (MAB) submitted an application to DOE for a Federal loan guarantee to support construction of a multi-feedstock biorefinery that would produce approximately 115 million gallons per year of ethanol in Great Falls, Montana. The biorefinery would utilize renewable biomass in the form of barley and wheat to produce ethanol and other by-products, including wheat gluten, barley bran, and barley meal. NOTE: The EA is cancelled because the applicant withdrew from the program.

  3. Nucleic acid molecules conferring enhanced ethanol tolerance and microorganisms having enhanced tolerance to ethanol

    DOE Patents [OSTI]

    Brown, Steven; Guss, Adam; Yang, Shihui; Karpinets, Tatiana; Lynd, Lee; Shao, Xiongjun

    2014-01-14

    The present invention provides isolated nucleic acid molecules which encode a mutant acetaldehyde-CoA/alcohol dehydrogenase or mutant alcohol dehydrogenase and confer enhanced tolerance to ethanol. The invention also provides related expression vectors, genetically engineered microorganisms having enhanced tolerance to ethanol, as well as methods of making and using such genetically modified microorganisms for production of biofuels based on fermentation of biomass materials.

  4. Genetic and biotechnological approaches for biofuel crop improvement.

    E-Print Network [OSTI]

    Vega-Sánchez, Miguel E; Ronald, Pamela C

    2010-01-01

    Plant genetic engineering for biofuel production: towardsbiomass feedstocks for biofuel production. Genome Biol 2008,3:354-359. 25. Fairless D: Biofuel: the little shrub that

  5. Economic contribution of lignins to ethanol production from biomass

    SciTech Connect (OSTI)

    Chum, H.L.; Parker, S.K.; Feinberg, D.A.; Wright, J.D.; Rice, P.A.; Sinclair, S.A.; Glasser, W.G.

    1985-05-01

    Lignin, one of the three major polymeric components of biomass (16% to 33% by weight in wood), has the highest specific heat content. Therefore, it can be burned for process fuel. Compared to coal, its fuel value is 2.2 cents/lb. This report investigates markets for lignin utilization of higher value. After lignin isolation from the process, purchase of replacement fuel (coal was analyzed), lignin sale for the manufacture of solid materials or higher value octane enhancers was evaluated. Polymeric applications evaluated were: surfactants, asphalt, carbon black, adhesives, and lignin plastics; agricultural applications were briefly reviewed. These lignins would generate coproduct credits of 25 cents to 150 cents/gallon of ethanol respectively for 7.5 cents to 60 cents/lb lignin value (isolation and eventual modification costs were taken into account). Overall markets for these polymeric applications were projected at 11 billion lb/year by the year 2000. These projections are intensities of demand and not actual shipments of lignins. In addition, this report investigates the possibility of converting lignins into mixtures of methyls aryl ethers and methyl substituted-aryl ethers which are high value octane enhancers, fully compatible with gasoline. The report intends to show that if fuel ethanol production in the billions of gallons scale occurs lignin markets would not be saturated. 10 refs., 14 figs., 36 tabs.

  6. FRACTIONATION OF LIGNOCELLULOSIC BIOMASS FOR FUEL-GRADE ETHANOL PRODUCTION

    SciTech Connect (OSTI)

    F.D. Guffey; R.C. Wingerson

    2002-10-01

    PureVision Technology, Inc. (PureVision) of Fort Lupton, Colorado is developing a process for the conversion of lignocellulosic biomass into fuel-grade ethanol and specialty chemicals in order to enhance national energy security, rural economies, and environmental quality. Lignocellulosic-containing plants are those types of biomass that include wood, agricultural residues, and paper wastes. Lignocellulose is composed of the biopolymers cellulose, hemicellulose, and lignin. Cellulose, a polymer of glucose, is the component in lignocellulose that has potential for the production of fuel-grade ethanol by direct fermentation of the glucose. However, enzymatic hydrolysis of lignocellulose and raw cellulose into glucose is hindered by the presence of lignin. The cellulase enzyme, which hydrolyzes cellulose to glucose, becomes irreversibly bound to lignin. This requires using the enzyme in reagent quantities rather than in catalytic concentration. The extensive use of this enzyme is expensive and adversely affects the economics of ethanol production. PureVision has approached this problem by developing a biomass fractionator to pretreat the lignocellulose to yield a highly pure cellulose fraction. The biomass fractionator is based on sequentially treating the biomass with hot water, hot alkaline solutions, and polishing the cellulose fraction with a wet alkaline oxidation step. In September 2001 PureVision and Western Research Institute (WRI) initiated a jointly sponsored research project with the U.S. Department of Energy (DOE) to evaluate their pretreatment technology, develop an understanding of the chemistry, and provide the data required to design and fabricate a one- to two-ton/day pilot-scale unit. The efforts during the first year of this program completed the design, fabrication, and shakedown of a bench-scale reactor system and evaluated the fractionation of corn stover. The results from the evaluation of corn stover have shown that water hydrolysis prior to alkaline hydrolysis may be beneficial in removing hemicellulose and lignin from the feedstock. In addition, alkaline hydrolysis has been shown to remove a significant portion of the hemicellulose and lignin. The resulting cellulose can be exposed to a finishing step with wet alkaline oxidation to remove the remaining lignin. The final product is a highly pure cellulose fraction containing less than 1% of the native lignin with an overall yield in excess of 85% of the native cellulose. This report summarizes the results from the first year's effort to move the technology to commercialization.

  7. EFFECTS OF CHANGES IN U.S. ETHANOL PRODUCTION FROM CORN GRAIN, CORN STOVER, AND SWITCHGRASS ON WORLD AGRICULTURAL MARKETS AND TRADE 

    E-Print Network [OSTI]

    Campiche, Jody L.

    2010-07-14

    The renewable energy industry continues to expand at a rapid pace. New advances in cellulosic ethanol technologies have the potential to reduce our dependency on foreign oil. The evolution of these new biofuel markets could have significant effects...

  8. Chromatin landscaping in algae reveals novel regulation pathway for biofuels production

    SciTech Connect (OSTI)

    Ngan, Chew Yee; Wong, Chee-Hong; Choi, Cindy; Pratap, Abhishek; Han, James; Wei, Chia-Lin

    2013-02-19

    The diminishing reserve of fossil fuels calls for the development of biofuels. Biofuels are produced from renewable resources, including photosynthetic organisms, generating clean energy. Microalgae is one of the potential feedstock for biofuels production. It grows easily even in waste water, and poses no competition to agricultural crops for arable land. However, little is known about the algae lipid biosynthetic regulatory mechanisms. Most studies relied on the homology to other plant model organisms, in particular Arabidopsis or through low coverage expression analysis to identify key enzymes. This limits the discovery of new components in the biosynthetic pathways, particularly the genetic regulators and effort to maximize the production efficiency of algal biofuels. Here we report an unprecedented and de novo approach to dissect the algal lipid pathways through disclosing the temporal regulations of chromatin states during lipid biosynthesis. We have generated genome wide chromatin maps in chlamydomonas genome using ChIP-seq targeting 7 histone modifications and RNA polymerase II in a time-series manner throughout conditions activating lipid biosynthesis. To our surprise, the combinatory profiles of histone codes uncovered new regulatory mechanism in gene expression in algae. Coupled with matched RNA-seq data, chromatin changes revealed potential novel regulators and candidate genes involved in the activation of lipid accumulations. Genetic perturbation on these candidate regulators further demonstrated the potential to manipulate the regulatory cascade for lipid synthesis efficiency. Exploring epigenetic landscape in microalgae shown here provides powerful tools needed in improving biofuel production and new technology platform for renewable energy generation, global carbon management, and environmental survey.

  9. Solid state fermentation system for production of ethanol from apple pomace

    SciTech Connect (OSTI)

    Hang, Y.D.; Lee, C.Y.; Woodams, E.E.

    1982-01-01

    A solid state fermentation system for the production of ethanol from apple pomace with a Montrachet strain of Saccharomyces cerevisiae is described. The yields of ethanol varied from about 29 g to more than 40 g/kg of apple pomace, depending on the samples fermented. Separation of up to 99% of the ethanol from spent qpple pomace was achieved with a rotary vacuum evaporator. Alcohol fermentation of apple pomace might be an efficient method of alleviating waste disposal problems with the concomitant production of ethanol.

  10. Analysis of advanced biofuels.

    SciTech Connect (OSTI)

    Dec, John E.; Taatjes, Craig A.; Welz, Oliver; Yang, Yi

    2010-09-01

    Long chain alcohols possess major advantages over ethanol as bio-components for gasoline, including higher energy content, better engine compatibility, and less water solubility. Rapid developments in biofuel technology have made it possible to produce C{sub 4}-C{sub 5} alcohols efficiently. These higher alcohols could significantly expand the biofuel content and potentially replace ethanol in future gasoline mixtures. This study characterizes some fundamental properties of a C{sub 5} alcohol, isopentanol, as a fuel for homogeneous-charge compression-ignition (HCCI) engines. Wide ranges of engine speed, intake temperature, intake pressure, and equivalence ratio are investigated. The elementary autoignition reactions of isopentanol is investigated by analyzing product formation from laser-photolytic Cl-initiated isopentanol oxidation. Carbon-carbon bond-scission reactions in the low-temperature oxidation chemistry may provide an explanation for the intermediate-temperature heat release observed in the engine experiments. Overall, the results indicate that isopentanol has a good potential as a HCCI fuel, either in neat form or in blend with gasoline.

  11. Interactions of woody biofuel feedstock production systems with water resources: Considerations for sustainability.

    SciTech Connect (OSTI)

    Trettin, Carl,C.; Amatya, Devendra; Coleman, Mark.

    2008-07-01

    Abstract. Water resources are important for the production of woody biofuel feedstocks. It is necessary to ensure that production systems do not adversely affect the quantity or quality of surface and ground water. The effects of woody biomass plantations on water resources are largely dependent on the prior land use and the management regime. Experience from both irrigated and non-irrigated systems has demonstrated that woody biofuel production systems do not impair water quality. Water quality actually improves from conversion of idle or degraded agricultural lands to woody biomass plantations. Site water balance may be altered by cultivation of woody biomass plantations relative to agricultural use, due to increases in evapostranspiration (ET) and storage. Incorporation of woody biomass production plantations within the landscape provides an opportunity to improve the quality of runoff water and soil conservation. Given the centrality of water resources to the sustainability of ecosystem services and other values derived, the experience with woody biofuels feedstock production systems is positive. Keywords. Short rotation woody crop, forest hydrology, water quality, hardwood plantation.

  12. Biochemical Production of Ethanol from Corn Stover: 2007 State...

    Broader source: Energy.gov (indexed) [DOE]

    Process Design and Economics for Biochemical Conversion of Lignocellulosic Biomass to Ethanol: Dilute-Acid Pretreatment and Enzymatic Hydrolysis of Corn Stover Process Design and...

  13. The impact of co-occurring tree and grassland species on carbon sequestration and potential biofuel production

    E-Print Network [OSTI]

    Thomas, David D.

    for terrestrial carbon sequestration and potential biofuel production. For P. strobus, above- ground plant carbonThe impact of co-occurring tree and grassland species on carbon sequestration and potential biofuel production R A M E S H L A U N G A N I and J O H A N N E S M . H . K N O P S School of Biological Sciences

  14. Recycling of Nutrients and Water in Algal Biofuels Production

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    not substantially improve nutrient solubilization after anaerobic and aerobic digestions. Biogas production increased by 15%, but that is insufficient to cover the energy input of...

  15. Measuring and moderating the water resource impact of biofuel production and trade

    E-Print Network [OSTI]

    Fingerman, Kevin Robert

    2012-01-01

    for   ethanol  and  biodiesel  in  the  European  Union-­?IEA  2009).   Thousand  barrels  per  day   ROW  biodiesel  Europe  Biodiesel   ROW  Ethanol   Brazil  Ethanol   US  

  16. Ethanol increases matrix metalloproteinase-12 expression via NADPH oxidase-dependent ROS production in macrophages

    SciTech Connect (OSTI)

    Kim, Mi Jin; Nepal, Saroj; Lee, Eung-Seok; Jeong, Tae Cheon; Kim, Sang-Hyun; Park, Pil-Hoon

    2013-11-15

    Matrix metalloproteinase-12 (MMP-12), an enzyme responsible for degradation of extracellular matrix, plays an important role in the progression of various diseases, including inflammation and fibrosis. Although most of those are pathogenic conditions induced by ethanol ingestion, the effect of ethanol on MMP-12 has not been explored. In the present study, we investigated the effect of ethanol on MMP-12 expression and its potential mechanisms in macrophages. Here, we demonstrated that ethanol treatment increased MMP-12 expression in primary murine peritoneal macrophages and RAW 264.7 macrophages at both mRNA and protein levels. Ethanol treatment also significantly increased the activity of nicotinamide adenine dinucleotide (NADPH) oxidase and the expression of NADPH oxidase-2 (Nox2). Pretreatment with an anti-oxidant (N-acetyl cysteine) or a selective inhibitor of NADPH oxidase (diphenyleneiodonium chloride (DPI)) prevented ethanol-induced MMP-12 expression. Furthermore, knockdown of Nox2 by small interfering RNA (siRNA) prevented ethanol-induced ROS production and MMP-12 expression in RAW 264.7 macrophages, indicating a critical role for Nox2 in ethanol-induced intracellular ROS production and MMP-12 expression in macrophages. We also showed that ethanol-induced Nox2 expression was suppressed by transient transfection with dominant negative I?B-? plasmid or pretreatment with Bay 11-7082, a selective inhibitor of NF-?B, in RAW 264.7 macrophages. In addition, ethanol-induced Nox2 expression was also attenuated by treatment with a selective inhibitor of p38 MAPK, suggesting involvement of p38 MAPK/NF-?B pathway in ethanol-induced Nox2 expression. Taken together, these results demonstrate that ethanol treatment elicited increase in MMP-12 expression via increase in ROS production derived from Nox2 in macrophages. - Highlights: • Ethanol increases ROS production through up-regulation of Nox2 in macrophages. • Enhanced oxidative stress contributes to ethanol-induced MMP-12 expression. • p38 MAPK/NF-?B signaling pathway modulates ethanol-induced Nox2 expression.

  17. Preliminary Economics for the Production of Pyrolysis Oil from Lignin in a Cellulosic Ethanol Biorefinery

    SciTech Connect (OSTI)

    Jones, Susanne B.; Zhu, Yunhua

    2009-04-01

    Cellulosic ethanol biorefinery economics can be potentially improved by converting by-product lignin into high valued products. Cellulosic biomass is composed mainly of cellulose, hemicellulose and lignin. In a cellulosic ethanol biorefinery, cellulose and hemicellullose are converted to ethanol via fermentation. The raw lignin portion is the partially dewatered stream that is separated from the product ethanol and contains lignin, unconverted feed and other by-products. It can be burned as fuel for the plant or can be diverted into higher-value products. One such higher-valued product is pyrolysis oil, a fuel that can be further upgraded into motor gasoline fuels. While pyrolysis of pure lignin is not a good source of pyrolysis liquids, raw lignin containing unconverted feed and by-products may have potential as a feedstock. This report considers only the production of the pyrolysis oil and does not estimate the cost of upgrading that oil into synthetic crude oil or finished gasoline and diesel. A techno-economic analysis for the production of pyrolysis oil from raw lignin was conducted. comparing two cellulosic ethanol fermentation based biorefineries. The base case is the NREL 2002 cellulosic ethanol design report case where 2000 MTPD of corn stover is fermented to ethanol (NREL 2002). In the base case, lignin is separated from the ethanol product, dewatered, and burned to produce steam and power. The alternate case considered in this report dries the lignin, and then uses fast pyrolysis to generate a bio-oil product. Steam and power are generated in this alternate case by burning some of the corn stover feed, rather than fermenting it. This reduces the annual ethanol production rate from 69 to 54 million gallons/year. Assuming a pyrolysis oil value similar to Btu-adjusted residual oil, the estimated ethanol selling price ranges from $1.40 to $1.48 (2007 $) depending upon the yield of pyrolysis oil. This is considerably above the target minimum ethanol selling price of $1.33 for the 2012 goal case process as reported in the 2007 State of Technology Model (NREL 2008). Hence, pyrolysis oil does not appear to be an economically attractive product in this scenario. Further research regarding fast pyrolysis of raw lignin from a cellulosic plant as an end product is not recommended. Other processes, such as high-pressure liquefaction or wet gasification, and higher value products, such as gasoline and diesel from fast pyrolysis oil should be considered in future studies.

  18. High-biomass sorghums for biomass biofuel production 

    E-Print Network [OSTI]

    Packer, Daniel

    2011-05-09

    photoperiod-sensitive (PS) hybrids within the Ma1/Ma5/Ma6 hybrid production system. High-biomass sorghums are PS and the Ma1/Ma5/Ma6 hybrid production system produces PS hybrids with PI parents by manipulating alleles at the Ma1, Ma5 and Ma6 sorghum maturity...

  19. Biofuels from Corn Stover: Pyrolytic Production and Catalytic Upgrading Studies 

    E-Print Network [OSTI]

    Capunitan, Jewel Alviar

    2013-01-15

    product properties (lower moisture, TAN, and highest heating value), and can be a potential feedstock for co-processing with crude oils in existing refineries. Major reactions involved were conversion of phenolics to aromatics and hydrogenation of ketones...

  20. Ethanol Production and Gasoline Prices: A Spurious Correlation

    E-Print Network [OSTI]

    Smith, Aaron

    Ethanol made from corn comprises 10% of U.S. gasoline, up from 3% in 2003. This dramatic increase was spurred by recent policy initiatives such as the Renewable Fuel Standard and state-level blend mandates and supported ...

  1. Biomass to ethanol : potential production and environmental impacts

    E-Print Network [OSTI]

    Groode, Tiffany Amber, 1979-

    2008-01-01

    This study models and assesses the current and future fossil fuel consumption and greenhouse gas impacts of ethanol produced from three feedstocks; corn grain, corn stover, and switchgrass. A life-cycle assessment approach ...

  2. Review: Continuous hydrolysis and fermentation for cellulosic ethanol production Simone Brethauer, Charles E. Wyman *

    E-Print Network [OSTI]

    California at Riverside, University of

    Review: Continuous hydrolysis and fermentation for cellulosic ethanol production Simone Brethauer for these benefits to be realized. Continuous hydrolysis and fermentation processes offer important potential advantages in reducing costs, but little has been done on continuous processing of cellulosic biomass

  3. Fact #681: June 27, 2011 U.S. Ethanol Production, 2001-2010

    Broader source: Energy.gov [DOE]

    Ethanol production has been rising rapidly over the last 10 years driven largely by government standards requiring the use of renewable fuels. The first Renewable Fuels Standard (RFS) was...

  4. A Pre-treatment Model for Ethanol Production Using a Colorimetric...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    A Pre-treatment Model for Ethanol Production Using a Colorimetric Analysis of Starch Solutions AUTHORS: Eric Benson and Chris Ederer E-mail Addresses: eric.benson@theloganschool.o...

  5. Measurements and predictions of the radiation characteristics of biofuel-producing microorganisms

    E-Print Network [OSTI]

    Heng, Ri-Liang

    2015-01-01

    Biofuel Production fromFigures Lifecycle diagram of microalgal biofuel production [used for CO 2 ?xation and biofuel production”, Journal of

  6. Energy and Greenhouse Gas Impacts of Biofuels: A Framework for Analysis

    E-Print Network [OSTI]

    Kammen, Daniel M.; Farrell, Alexander E; Plevin, Richard J; Jones, Andrew; Nemet, Gregory F; Delucchi, Mark

    2008-01-01

    The rapid rise in biofuel production is driven by governmentprices. Globally, biofuel production is dominated bysoybeans) and current biofuel production processes are many

  7. Essays on the Economics of Climate Change, Biofuel and Food Prices

    E-Print Network [OSTI]

    Seguin, Charles

    2012-01-01

    negative impacts that biofuel production might have on foodbrought about by biofuel production. Non-convexities inlook at the optimal biofuel production when it competes for

  8. Biofuel policy must evaluate environmental, food security and energy goals to maximize net benefits

    E-Print Network [OSTI]

    Sexton, Steven E; Rajagapol, Deepak; Hochman, Gal; Zilberman, David D; Roland-Holst, David

    2009-01-01

    associated with biofuel production, including environmental3. Water use in biofuel production. Fig. 4. Water embeddedthe water consumed in biofuel production. By some estimates,

  9. Carbon Accounting and Economic Model Uncertainty of Emissions from Biofuels-Induced Land Use Change

    E-Print Network [OSTI]

    Plevin, Richard J; Beckman, Jayson; Golub, Alla A; Witcover, Julie; O'??Hare, Michael

    2015-01-01

    an increase in biofuel production. According to several;emissions from ILUC. Biofuel production also affects foodfrom increased biofuel production. AEZ- EF takes the GTAP

  10. Life of Sugar: Developing Lifecycle Methods to Evaluate the Energy and Environmental Impacts of Sugarcane Biofuels

    E-Print Network [OSTI]

    Gopal, Anand Raja

    2011-01-01

    for Sustainable Biofuel Production. RSB, pages 1–29. [Birur2008b). Impact of Biofuel Production on World AgriculturalPolicies for Biofuel Production. Conservation Biology, 22(

  11. Designer synthetic media for studying microbial-catalyzed biofuel production

    SciTech Connect (OSTI)

    Tang, Xiaoyu [Biogas Inst. of Ministry of Agriculture, Chengdu (China); da Costa Sousa, Leonardo [Michigan State Univ., East Lansing, MI (United States); Jin, Mingjie [Michigan State Univ., East Lansing, MI (United States); Chundawat, Shishir [Michigan State Univ., East Lansing, MI (United States); State Univ. of New Jersey, Piscataway, NJ (United States); Chambliss, Charles [Baylor Univ., Waco, TX (United States); Lau, Ming W [Michigan State Univ., East Lansing, MI (United States); Xiao, Zeyi [Sichuan Univ., Chengdu (China); Dale, Bruce E [Michigan State Univ., East Lansing, MI (United States); Balan, Venkatesh [Michigan State Univ., East Lansing, MI (United States)

    2015-01-01

    Background: The fermentation inhibition of yeast or bacteria by lignocellulose-derived degradation products, during hexose/pentose co-fermentation, is a major bottleneck for cost-effective lignocellulosic biorefineries. To engineer microbial strains for improved performance, it is critical to understand the mechanisms of inhibition that affect fermentative organisms in the presence of major components of a lignocellulosic hydrolysate. The development of a synthetic lignocellulosic hydrolysate (SH) media with a composition similar to the actual biomass hydrolysate will be an important advancement to facilitate these studies. In this work, we characterized the nutrients and plant-derived decomposition products present in AFEX™ pretreated corn stover hydrolysate (ACH). The SH was formulated based on the ACH composition and was further used to evaluate the inhibitory effects of various families of decomposition products during Saccharomyces cerevisiae 424A (LNH-ST) fermentation. Results: The ACH contained high levels of nitrogenous compounds, notably amides, pyrazines, and imidazoles. In contrast, a relatively low content of furans and aromatic and aliphatic acids were found in the ACH. Though most of the families of decomposition products were inhibitory to xylose fermentation, due to their abundance, the nitrogenous compounds showed the most inhibition. From these compounds, amides (products of the ammonolysis reaction) contributed the most to the reduction of the fermentation performance. However, this result is associated to a concentration effect, as the corresponding carboxylic acids (products of hydrolysis) promoted greater inhibition when present at the same molar concentration as the amides. Due to its complexity, the formulated SH did not perfectly match the fermentation profile of the actual hydrolysate, especially the growth curve. However, the SH formulation was effective for studying the inhibitory effect of various compounds on yeast fermentation. Conclusions: The formulation of SHs is an important advancement for future multi-omics studies and for better understanding the mechanisms of fermentation inhibition in lignocellulosic hydrolysates. The SH formulated in this work was instrumental for defining the most important inhibitors in the ACH. Major AFEX decomposition products are less inhibitory to yeast fermentation than the products of dilute acid or steam explosion pretreatments; thus, ACH is readily fermentable by yeast without any detoxification.

  12. Designer synthetic media for studying microbial-catalyzed biofuel production

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tang, Xiaoyu; da Costa Sousa, Leonardo; Jin, Mingjie; Chundawat, Shishir; Chambliss, Charles; Lau, Ming W; Xiao, Zeyi; Dale, Bruce E; Balan, Venkatesh

    2015-01-01

    Background: The fermentation inhibition of yeast or bacteria by lignocellulose-derived degradation products, during hexose/pentose co-fermentation, is a major bottleneck for cost-effective lignocellulosic biorefineries. To engineer microbial strains for improved performance, it is critical to understand the mechanisms of inhibition that affect fermentative organisms in the presence of major components of a lignocellulosic hydrolysate. The development of a synthetic lignocellulosic hydrolysate (SH) media with a composition similar to the actual biomass hydrolysate will be an important advancement to facilitate these studies. In this work, we characterized the nutrients and plant-derived decomposition products present in AFEX™ pretreated corn stover hydrolysate (ACH). Themore »SH was formulated based on the ACH composition and was further used to evaluate the inhibitory effects of various families of decomposition products during Saccharomyces cerevisiae 424A (LNH-ST) fermentation. Results: The ACH contained high levels of nitrogenous compounds, notably amides, pyrazines, and imidazoles. In contrast, a relatively low content of furans and aromatic and aliphatic acids were found in the ACH. Though most of the families of decomposition products were inhibitory to xylose fermentation, due to their abundance, the nitrogenous compounds showed the most inhibition. From these compounds, amides (products of the ammonolysis reaction) contributed the most to the reduction of the fermentation performance. However, this result is associated to a concentration effect, as the corresponding carboxylic acids (products of hydrolysis) promoted greater inhibition when present at the same molar concentration as the amides. Due to its complexity, the formulated SH did not perfectly match the fermentation profile of the actual hydrolysate, especially the growth curve. However, the SH formulation was effective for studying the inhibitory effect of various compounds on yeast fermentation. Conclusions: The formulation of SHs is an important advancement for future multi-omics studies and for better understanding the mechanisms of fermentation inhibition in lignocellulosic hydrolysates. The SH formulated in this work was instrumental for defining the most important inhibitors in the ACH. Major AFEX decomposition products are less inhibitory to yeast fermentation than the products of dilute acid or steam explosion pretreatments; thus, ACH is readily fermentable by yeast without any detoxification.« less

  13. OPTIMIZATION OF SUGAR CONSUMPTION IN THE FERMENTATION OF TEMULOSE FOR ETHANOL PRODUCTION 

    E-Print Network [OSTI]

    Michalka, Jacquelyn

    2007-07-14

    OPTIMIZATION OF SUGAR CONSUMPTION IN THE FERMENTATION OF TEMULOSE FOR ETHANOL PRODUCTION A Senior Honors Thesis by JACQUELYN MICHALKA Submitted to the Office of Honors Programs & Academic Scholarships Texas A&M University In partial fulfillment... of the requirements of the UNIVERSITY UNDERGRADUATE RESEARCH FELLOWS April 2007 Major: Biological Systems Engineering ii ABSTRACT Optimization of Sugar Consumption in the Fermentation of Temulose for the Production of Ethanol Jacquelyn Michalka...

  14. Soil Carbon Change and Net Energy Associated with Biofuel Production on Marginal Lands: A Regional Modeling Perspective

    SciTech Connect (OSTI)

    Bandaru, Varaprasad; Izaurralde, Roberto C.; Manowitz, David H.; Link, Robert P.; Zhang, Xuesong; Post, W. M.

    2013-12-01

    The use of marginal lands (MLs) for biofuel production has been contemplated as a promising solution for meeting biofuel demands. However, there have been concerns with spatial location of MLs, their inherent biofuel potential, and possible environmental consequences with the cultivation of energy crops. Here, we developed a new quantitative approach that integrates high-resolution land cover and land productivity maps and uses conditional probability density functions for analyzing land use patterns as a function of land productivity to classify the agricultural lands. We subsequently applied this method to determine available productive croplands (P-CLs) and non-crop marginal lands (NC-MLs) in a nine-county Southern Michigan. Furthermore, Spatially Explicit Integrated Modeling Framework (SEIMF) using EPIC (Environmental Policy Integrated Climate) was used to understand the net energy (NE) and soil organic carbon (SOC) implications of cultivating different annual and perennial production systems.

  15. Techno-Economic Analysis of Biofuels Production Based on Gasification

    SciTech Connect (OSTI)

    Swanson, R. M.; Platon, A.; Satrio, J. A.; Brown, R. C.; Hsu, D. D.

    2010-11-01

    This study compares capital and production costs of two biomass-to-liquid production plants based on gasification. The first biorefinery scenario is an oxygen-fed, low-temperature (870?C), non-slagging, fluidized bed gasifier. The second scenario is an oxygen-fed, high-temperature (1,300?C), slagging, entrained flow gasifier. Both are followed by catalytic Fischer-Tropsch synthesis and hydroprocessing to naphtha-range (gasoline blend stock) and distillate-range (diesel blend stock) liquid fractions. Process modeling software (Aspen Plus) is utilized to organize the mass and energy streams and cost estimation software is used to generate equipment costs. Economic analysis is performed to estimate the capital investment and operating costs. Results show that the total capital investment required for nth plant scenarios is $610 million and $500 million for high-temperature and low-temperature scenarios, respectively. Product value (PV) for the high-temperature and low-temperature scenarios is estimated to be $4.30 and $4.80 per gallon of gasoline equivalent (GGE), respectively, based on a feedstock cost of $75 per dry short ton. Sensitivity analysis is also performed on process and economic parameters. This analysis shows that total capital investment and feedstock cost are among the most influential parameters affecting the PV.

  16. A Green Technology for the Production of Biofuels . The past several decades have been demarcated by growing concerns about

    E-Print Network [OSTI]

    Appanna, Vasu

    A Green Technology for the Production of Biofuels Dan Whalen #12;Abstract . The past several of green technologies and alternative fuel sources in an effort to diminish GHG production. One of hemicellulose, a major component of woody materials, in the production of alternative fuels remains elusive

  17. An Integrated Assessment of Location-Dependent Scaling for Microalgae Biofuel Production Facilities

    SciTech Connect (OSTI)

    Coleman, Andre M.; Abodeely, Jared; Skaggs, Richard; Moeglein, William AM; Newby, Deborah T.; Venteris, Erik R.; Wigmosta, Mark S.

    2014-07-01

    Successful development of a large-scale microalgae-based biofuels industry requires comprehensive analysis and understanding of the feedstock supply chain—from facility siting/design through processing/upgrading of the feedstock to a fuel product. The evolution from pilot-scale production facilities to energy-scale operations presents many multi-disciplinary challenges, including a sustainable supply of water and nutrients, operational and infrastructure logistics, and economic competitiveness with petroleum-based fuels. These challenges are addressed in part by applying the Integrated Assessment Framework (IAF)—an integrated multi-scale modeling, analysis, and data management suite—to address key issues in developing and operating an open-pond facility by analyzing how variability and uncertainty in space and time affect algal feedstock production rates, and determining the site-specific “optimum” facility scale to minimize capital and operational expenses. This approach explicitly and systematically assesses the interdependence of biofuel production potential, associated resource requirements, and production system design trade-offs. The IAF was applied to a set of sites previously identified as having the potential to cumulatively produce 5 billion-gallons/year in the southeastern U.S. and results indicate costs can be reduced by selecting the most effective processing technology pathway and scaling downstream processing capabilities to fit site-specific growing conditions, available resources, and algal strains.

  18. Advancing Commercialization of Algal Biofuels Through Increased Biomass Productivity and Technology Integration

    SciTech Connect (OSTI)

    Bai, Xuemei; Sabarsky, Martin

    2013-09-30

    Cellana is a leading developer of algae-based bioproducts, and its pre-commercial production of marine microalgae takes place at Cellana?s Kona Demonstration Facility (KDF) in Hawaii. KDF is housing more than 70 high-performing algal strains for different bioproducts, of which over 30 have been grown outside at scale. So far, Cellana has produced more than 10 metric tons of algal biomass for the development of biofuels, animal feed, and high-value nutraceuticals. Cellana?s ALDUO algal cultivation technology allows Cellana to grow non-extremophile algal strains at large scale with no contamination disruptions. Cellana?s research and production at KDF have addressed three major areas that are crucial for the commercialization of algal biofuels: yield improvement, cost reduction, and the overall economics. Commercially acceptable solutions have been developed and tested for major factors limiting areal productivity of algal biomass and lipids based on years of R&D work conducted at KDF. Improved biomass and lipid productivity were achieved through strain improvement, culture management strategies (e.g., alleviation of self-shading, de-oxygenation, and efficient CO2 delivery), and technical advancement in downstream harvesting technology. Cost reduction was achieved through optimized CO2 delivery system, flue gas utilization technology, and energy-efficient harvesting technology. Improved overall economics was achieved through a holistic approach by integration of high-value co-products in the process, in addition to yield improvements and cost reductions.

  19. Continuous Ethanol Production Using Immobilized-Cell/Enzyme Biocatalysts in Fluidized-Bed Bioreactor (FBR)

    SciTech Connect (OSTI)

    Nghiem, NP

    2003-11-16

    The immobilized-cell fluidized-bed bioreactor (FBR) was developed at Oak Ridge National Laboratory (ORNL). Previous studies at ORNL using immobilized Zymomonas mobilis in FBR at both laboratory and demonstration scale (4-in-ID by 20-ft-tall) have shown that the system was more than 50 times as productive as industrial benchmarks (batch and fed-batch free cell fermentations for ethanol production from glucose). Economic analysis showed that a continuous process employing the FBR technology to produce ethanol from corn-derived glucose would offer savings of three to six cents per gallon of ethanol compared to a typical batch process. The application of the FBR technology for ethanol production was extended to investigate more complex feedstocks, which included starch and lignocellulosic-derived mixed sugars. Economic analysis and mathematical modeling of the reactor were included in the investigation. This report summarizes the results of these extensive studies.

  20. Catalytic Fast Pyrolysis for the Production of the Hydrocarbon Biofuels

    SciTech Connect (OSTI)

    Nimlos, M. R.; Robichaud, D. J.; Mukaratate, C.; Donohoe, B. S.; Iisa, K.

    2013-01-01

    Catalytic fast pyrolysis is a promising technique for conversion of biomass into hydrocarbons for use as transportation fuels. For over 30 years this process has been studied and it has been demonstrated that oils can be produced with high concentrations of hydrocarbons and low levels of oxygen. However, the yields from this type of conversion are typically low and the catalysts, which are often zeolites, are quickly deactivated through coking. In addition, the hydrocarbons produced are primarily aromatic molecules (benzene, toluene, xylene) that not desirable for petroleum refineries and are not well suited for diesel or jet engines. The goals of our research are to develop new multifunction catalysts for the production of gasoline, diesel and jet fuel range molecules and to improve process conditions for higher yields and low coking rates. We are investigating filtration and the use of hydrogen donor molecules to improve catalyst performance.

  1. Biofuel Production Datasets from DOE's Bioenergy Knowledge Discovery Framework (KDF)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Bioenergy Knowledge Discovery Framework invites users to discover the power of bioenergy through an interface that provides extensive access to research data and literature, GIS mapping tools, and collaborative networks. The Bioenergy KDF supports efforts to develop a robust and sustainable bioenergy industry. The KDF facilitates informed decision making by providing a means to synthesize, analyze, and visualize vast amounts of information in a relevant and succinct manner. It harnesses Web 2.0 and social networking technologies to build a collective knowledge system that can better examine the economic and environmental impacts of development options for biomass feedstock production, biorefineries, and related infrastructure. [copied from https://www.bioenergykdf.net/content/about]

    Holdings include datasets, models, and maps and the collections arel growing due to both DOE contributions and data uploads from individuals.

  2. Fuel from Tobacco and Arundo Donax: Synthetic Crop for Direct Drop-in Biofuel Production through Re-routing the Photorespiration Intermediates and Engineering Terpenoid Pathways

    SciTech Connect (OSTI)

    None

    2012-02-15

    PETRO Project: Biofuels offer renewable alternatives to petroleum-based fuels that reduce net greenhouse gas emissions to nearly zero. However, traditional biofuels production is limited not only by the small amount of solar energy that plants convert through photosynthesis into biological materials, but also by inefficient processes for converting these biological materials into fuels. Farm-ready, non-food crops are needed that produce fuels or fuel-like precursors at significantly lower costs with significantly higher productivity. To make biofuels cost-competitive with petroleum-based fuels, biofuels production costs must be cut in half.

  3. Understanding and engineering enzymes for enhanced biofuel production.

    SciTech Connect (OSTI)

    Simmons, Blake Alexander; Volponi, Joanne V.; Sapra, Rajat; Faulon, Jean-Loup Michel; Buffleben, George M.; Roe, Diana C.

    2009-01-01

    Today, carbon-rich fossil fuels, primarily oil, coal and natural gas, provide 85% of the energy consumed in the United States. The release of greenhouse gases from these fuels has spurred research into alternative, non-fossil energy sources. Lignocellulosic biomass is renewable resource that is carbon-neutral, and can provide a raw material for alternative transportation fuels. Plant-derived biomass contains cellulose, which is difficult to convert to monomeric sugars for production of fuels. The development of cost-effective and energy-efficient processes to transform the cellulosic content of biomass into fuels is hampered by significant roadblocks, including the lack of specifically developed energy crops, the difficulty in separating biomass components, the high costs of enzymatic deconstruction of biomass, and the inhibitory effect of fuels and processing byproducts on organisms responsible for producing fuels from biomass monomers. One of the main impediments to more widespread utilization of this important resource is the recalcitrance of cellulosic biomass and techniques that can be utilized to deconstruct cellulosic biomass.

  4. Versatile microbial surface-display for environmental remediation and biofuels production

    SciTech Connect (OSTI)

    Wu, Cindy H.; Mulchandani, Ashok; Chen, wilfred

    2008-02-14

    Surface display is a powerful technique that utilizes natural microbial functional components to express proteins or peptides on the cell exterior. Since the reporting of the first surface-display system in the mid-1980s, a variety of new systems have been reported for yeast, Gram-positive and Gram-negative bacteria. Non-conventional display methods are emerging, eliminating the generation of genetically modified microorganisms. Cells with surface display are used as biocatalysts, biosorbents and biostimulants. Microbial cell-surface display has proven to be extremely important for numerous applications ranging from combinatorial library screening and protein engineering to bioremediation and biofuels production.

  5. Biofuels from E. Coli: Engineering E. coli as an Electrofuels Chassis for Isooctane Production

    SciTech Connect (OSTI)

    None

    2010-07-16

    Electrofuels Project: Ginkgo Bioworks is bypassing photosynthesis and engineering E. coli to directly use carbon dioxide (CO2) to produce biofuels. E. coli doesn’t naturally metabolize CO2, but Ginkgo Bioworks is manipulating and incorporating the genes responsible for CO2 metabolism into the microorganism. By genetically modifying E. coli, Ginkgo Bioworks will enhance its rate of CO2 consumption and liquid fuel production. Ginkgo Bioworks is delivering CO2 to E. coli as formic acid, a simple industrial chemical that provides energy and CO2 to the bacterial system.

  6. US Biofuels Baseline and impact of extending the

    E-Print Network [OSTI]

    Noble, James S.

    June 2011 US Biofuels Baseline and impact of extending the $0.45 ethanol blenders baseline projections for agricultural and biofuel markets.1 That baseline assumed current biofuel policy for cellulosic biofuels was assumed to expire at the end of 2012. This report compares a slightly modified

  7. Ethanol production using xylitol synthesis mutant of xylose-utilizing zymomonas

    DOE Patents [OSTI]

    Viitanen, Paul V.; McCutchen, Carol M.; Emptage, Mark; Caimi, Perry G.; Zhang, Min; Chou, Yat-Chen

    2010-06-22

    Production of ethanol using a strain of xylose-utilizing Zymomonas with a genetic modification of the glucose-fructose oxidoreductase gene was found to be improved due to greatly reduced production of xylitol, a detrimental by-product of xylose metabolism synthesized during fermentation.

  8. Ethanol production with dilute acid hydrolysis using partially dried lignocellulosics

    DOE Patents [OSTI]

    Nguyen, Quang A. (Chesterfield, MO); Keller, Fred A. (Lakewood, CO); Tucker, Melvin P. (Lakewood, CO)

    2003-12-09

    A process of converting lignocellulosic biomass to ethanol, comprising hydrolyzing lignocellulosic materials by subjecting dried lignocellulosic material in a reactor to a catalyst comprised of a dilute solution of a strong acid and a metal salt to lower the activation energy (i.e., the temperature) of cellulose hydrolysis and ultimately obtain higher sugar yields.

  9. United Biofuels Private Limited | Open Energy Information

    Open Energy Info (EERE)

    United Biofuels Private Limited Jump to: navigation, search Name: United Biofuels Private Limited Place: Tamil Nadu, India Sector: Biomass Product: India-based owner and operator...

  10. Better Enzymes for Biofuels and Green Chemistry

    E-Print Network [OSTI]

    Better Enzymes for Biofuels and Green Chemistry: Solving the Cofactor Imbalance Problem Imbalances for the production of biofuels or other valuable chemicals. Though several research groups have re

  11. FACTSHEET: Energy Department Investments in Biofuels Innovation...

    Broader source: Energy.gov (indexed) [DOE]

    is working to catalyze breakthroughs in innovative biofuel technologies and advance biofuels production at refineries across the country. Rather than sending 1 billion each day...

  12. Integrating Food Production and Biodiversity

    E-Print Network [OSTI]

    with food, and NPK fluxes at farm level. The biofuels were crude rapeseed oil, horse draft, ethanol from a combination of a workhorse and a crude rapeseed oil-fuelled tractor. Ethanol from wheat had the largest impactIntegrating Food Production and Biodiversity Energy and Scale Issues in Implementation Kristina

  13. Life of Sugar: Developing Lifecycle Methods to Evaluate the Energy and Environmental Impacts of Sugarcane Biofuels

    E-Print Network [OSTI]

    Gopal, Anand Raja

    2011-01-01

    Criteria for Sustainable Biofuel Production. RSB, pages 1–and Tyner, W. (2008b). Impact of Biofuel Production on WorldClifford, P. (2009). Assessing Biofuel Crop Invasiveness: A

  14. Ethanol Fuel Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    have estimated that ethanol and other biofuels could replace 30% or more of U.S. gasoline demand by 2030. More than 95% of U.S. gasoline contains ethanol in a low-level blend to...

  15. Spectroscopic Analyses of the Biofuels-Critical Phytochemical Coniferyl Alcohol and Its Enzyme-Catalyzed Oxidation Products

    E-Print Network [OSTI]

    Achyuthan, Komandoor

    2013-01-01

    Analyses of the Biofuels-Critical Phytochemical Coniferylscreening; monolignols; biofuels 1. Introduction Plantfacing cost-effective biofuels [3]. Lignin analyses will

  16. Fuel from farms: A guide to small-scale ethanol production: Second edition

    SciTech Connect (OSTI)

    Not Available

    1982-05-01

    This guide presents the current status of on-farm fermentation ethanol production as well as an overview of some of the technical and economic factors. Tools such as decision and planning worksheets and a sample business plan for use in exploring whether or not to go into ethanol production are given. Specifics in production including information on the raw materials, system components, and operational requirements are also provided. Recommendation of any particular process is deliberately avoided because the choice must be tailored to the needs and resources of each individual producer. The emphasis is on providing the facts necessary to make informed judgments. 98 refs., 14 figs., 9 tabs.

  17. Fuel from farms: a guide to small-scale ethanol production

    SciTech Connect (OSTI)

    None

    1980-02-01

    A guide on fermentation processes with emphasis on small-scale production of ethanol using farm crops as a source of raw material is published. The current status of on-farm ethanol production as well as an overview of some of the technical and economic factors is presented. Decision and planning worksheets and a sample business plan for use in decision making are included. Specifics in production including information on the raw materials, system components, and operational requirements are also provided. Diagrams of fermentors and distilling apparatus are included. (DC)

  18. Siting Evaluation for Biomass-Ethanol Production in Hawaii

    SciTech Connect (OSTI)

    Kinoshita, C.M.; Zhou, J.

    2000-10-15

    This report examines four Hawaiian islands, Oahu, Hawaii, Maui, and Kauai, to identify three best combinations of potential sites and crops for producing dedicated supplies of biomass for conversion to ethanol. Key technical and economic factors considered in the siting evaluation include land availability (zoning and use), land suitability (agronomic conditions), potential quantities and costs of producing biomass feedstocks, infrastructure (including water and power supplies), transportation, and potential bioresidues to supplement dedicated energy crops.

  19. Drought-tolerant Biofuel Crops could be a Critical Hedge for Biorefineries

    E-Print Network [OSTI]

    Morrow, III, William R.

    2013-01-01

    for Sustainable Biofuel Production, Version 2.0. 2010,risk to future biofuel production, a risk that will likely

  20. Development of a microbial process for the conversion of carbon dioxide and electricity to higher alcohols as biofuels

    E-Print Network [OSTI]

    Li, Han

    2013-01-01

    EI, Liao JC. Direct biofuel production from carbon dioxide.for biohydrogen and biofuel production. Curr Opin Biotechnolin regulating the biofuel production gene. The system is

  1. DuPont's Cellulosic Ethanol Grand Opening Marks a Milestone for...

    Energy Savers [EERE]

    DuPont's Cellulosic Ethanol Grand Opening Marks a Milestone for the Advanced Biofuels Industry DuPont's Cellulosic Ethanol Grand Opening Marks a Milestone for the Advanced Biofuels...

  2. Cultivar variation and selection potential relevant to the production of cellulosic ethanol from wheat straw

    E-Print Network [OSTI]

    California at Riverside, University of

    Cultivar variation and selection potential relevant to the production of cellulosic ethanol from a , J. Magid b , B. Yang d , C.E. Wyman c a Forestry and Wood Products, Forest & Landscape, Faculty Received in revised form 8 November 2011 Accepted 9 December 2011 Available online xxx Keywords: Bioethanol

  3. Xylitol synthesis mutant of xylose-utilizing zymomonas for ethanol production

    DOE Patents [OSTI]

    Viitanen, Paul V.; Chou, Yat-Chen; McCutchen, Carol M.; Zhang, Min

    2010-06-22

    A strain of xylose-utilizing Zymomonas was engineered with a genetic modification to the glucose-fructose oxidoreductase gene resulting in reduced expression of GFOR enzyme activity. The engineered strain exhibits reduced production of xylitol, a detrimental by-product of xylose metabolism. It also consumes more xylose and produces more ethanol during mixed sugar fermentation under process-relevant conditions.

  4. Correct quantitative determination of ethanol and volatile compounds in alcohol products

    E-Print Network [OSTI]

    Charapitsa, Siarhei; Sytova, Svetlana; Yakuba, Yurii

    2014-01-01

    Determination of the volume content of ethanol in the alcohol products in practice is usually determined by pycnometry, electronic densimetry, or densimetry using a hydrostatic balance in accordance with Commission Regulation No 2870/2000. However, these methods determine directly only density of the tested liquid sample and does not take into account the effects of other volatile components such as aldehydes, esters and higher alcohols. So they are appropriate only for binary water-ethanol solutions in accordance with international table adopted by the International Legal Metrology Organization in its Recommendation No 22. Availability notable concentrations of the higher alcohols and ethers in different alcohol-based products, e. g. in whisky, cognac, brandy, wine as well as in waste alcohol and alcohol beverage production, leads to the significant contribution of these compounds in the value of the density of tested alcohol-containing sample. As a result, determination of the volume of ethanol content for ...

  5. Constructing and engineering fatty acid metabolic pathways for the production of fuels and chemicals

    E-Print Network [OSTI]

    Steen, Eric James

    2010-01-01

    costs and benefits of biodiesel and ethanol biofuels. Proccosts and benefits of biodiesel and ethanol biofuels. Procproduction of this biodiesel from hemicellulose demonstrates

  6. A Dynamic Simulation of the Indirect Land Use Implications of Recent Biofuel Production and Use in the United States.

    SciTech Connect (OSTI)

    Oladosu, Gbadebo A; Kline, Keith L

    2013-01-01

    The global indirect land use change (ILUC) implications of biofuel use in the United States of America (USA) from 2001 to 2010 are evaluated with a dynamic general equilibrium model. The effects of biofuels production on agricultural land area vary by year; from a net expansion of 0.17 ha per 1000 gallons produced (2002) to a net contraction of 0.13 ha per 1000 gallons (2018) in Case 1 of our simulation. In accordance with the general narrative about the implications of biofuel policy, agricultural land area increased in many regions of the world. However, oil-export dependent economies experienced agricultural land contraction because of reductions in their revenues. Reducing crude oil imports is a major goal of biofuel policy, but the land use change implications have received little attention in the literature. Simulations evaluating the effects of doubling supply elasticities for land and fossil resources show that these parameters can significantly influence the land use change estimates. Therefore, research that provides empirically-based and spatially-detailed agricultural land-supply curves and capability to project future fossil energy prices is critical for improving estimates of the effects of biofuel policy on land use.

  7. Designer organisms for photosynthetic production of ethanol from carbon dioxide and water

    DOE Patents [OSTI]

    Lee, James Weifu (Knoxville, TN)

    2011-07-05

    The present invention provides a revolutionary photosynthetic ethanol production technology based on designer transgenic plants, algae, or plant cells. The designer plants, designer algae, and designer plant cells are created such that the endogenous photosynthesis regulation mechanism is tamed, and the reducing power (NADPH) and energy (ATP) acquired from the photosynthetic water splitting and proton gradient-coupled electron transport process are used for immediate synthesis of ethanol (CH.sub.3CH.sub.2OH) directly from carbon dioxide (CO.sub.2) and water (H.sub.2O). The ethanol production methods of the present invention completely eliminate the problem of recalcitrant lignocellulosics by bypassing the bottleneck problem of the biomass technology. The photosynthetic ethanol-production technology of the present invention is expected to have a much higher solar-to-ethanol energy-conversion efficiency than the current technology and could also help protect the Earth's environment from the dangerous accumulation of CO.sub.2 in the atmosphere.

  8. Ethanol Demand in United States Production of Oxygenate-limited Gasoline

    SciTech Connect (OSTI)

    Hadder, G.R.

    2000-08-16

    Ethanol competes with methyl tertiary butyl ether (MTBE) to satisfy oxygen, octane, and volume requirements of certain gasolines. However, MTBE has water quality problems that may create significant market opportunities for ethanol. Oak Ridge National Laboratory (ORNL) has used its Refinery Yield Model to estimate ethanol demand in gasolines with restricted use of MTBE. Reduction of the use of MTBE would increase the costs of gasoline production and possibly reduce the gasoline output of U.S. refineries. The potential gasoline supply problems of an MTBE ban could be mitigated by allowing a modest 3 vol percent MTBE in all gasoline. In the U.S. East and Gulf Coast gasoline producing regions, the 3 vol percent MTBE option results in costs that are 40 percent less than an MTBE ban. In the U.S. Midwest gasoline producing region, with already high use of ethanol, an MTBE ban has minimal effect on ethanol demand unless gasoline producers in other regions bid away the local supply of ethanol. The ethanol/MTBE issue gained momentum in March 2000 when the Clinton Administration announced that it would ask Congress to amend the Clean Air Act to provide the authority to significantly reduce or eliminate the use of MTBE; to ensure that air quality gains are not diminished as MTBE use is reduced; and to replace the existing oxygenate requirement in the Clean Air Act with a renewable fuel standard for all gasoline. Premises for the ORNL study are consistent with the Administration announcement, and the ethanol demand curve estimates of this study can be used to evaluate the impact of the Administration principles and related policy initiatives.

  9. On mitigating emissions leakage under biofuel policies

    E-Print Network [OSTI]

    Rajagopal, D; Rajagopal, D

    2015-01-01

    than 1:1 replacement of oil products with biofuel, which isshow how different oil products are affected differently

  10. Guide to commercial-scale ethanol production and financing

    SciTech Connect (OSTI)

    1980-11-01

    This document is designed to lead the potential investor through all the steps necessary to develop a business plan and prepare a feasibility analysis for a site-specific project. Emphasis is placed on marketing, financing, management, and incentives rather than primarily technical matters. The introduction provides an overview of the perspectives and issues in the alcohol fuels industry. Chapter II seeks to surface factors which affect the decisionmaking process. The chapter attempts to lead the investor step-by-step through the series of decisions and choices to be made before reaching the final decision to enter the business. Chapter III describes the types of feedstocks available and relates them to areas within the United States. Trends and fluctuations in the price of the major grain feedstocks are also discussed in terms of their potential use and value compared to other feeds. Chapter IV discusses the market potential of ethanol and its coproducts, and examines how the location of the ethanol markets in relation to those of the feedstock supplies may influence selection of a plant site. Various aspects of plant design are discussed. A 50 million gallon per year plant is analyzed to provide the general technical background and costing data required in analyzing plants of various sizes and designs. Safety aspects and environmental concerns are treated in Chapters VI and VII. The regulations are reviewed and their impact on plant design and operation is discussed. The basic elements of a business plan are described which lead to an approach for development of the feasibility study. Other information on financial assistance, regulations, current legislation, and reference material is given in the Appendices.

  11. The Biofuels Revolution: Understanding the Social, Cultural and Economic Impacts of Biofuels Development on Rural Communities

    SciTech Connect (OSTI)

    Dr. Theresa L. Selfa; Dr. Richard Goe; Dr. Laszlo Kulcsar; Dr. Gerad Middendorf; Dr. Carmen Bain

    2013-02-11

    The aim of this research was an in-depth analysis of the impacts of biofuels industry and ethanol plants on six rural communities in the Midwestern states of Kansas and Iowa. The goal was to provide a better understanding of the social, cultural, and economic implications of biofuels development, and to contribute to more informed policy development regarding bioenergy.Specific project objectives were: 1. To understand how the growth of biofuel production has affected and will affect Midwestern farmers and rural communities in terms of economic, demographic, and socio-cultural impacts; 2. To determine how state agencies, groundwater management districts, local governments and policy makers evaluate or manage bioenergy development in relation to competing demands for economic growth, diminishing water resources, and social considerations; 3. To determine the factors that influence the water management practices of agricultural producers in Kansas and Iowa (e.g. geographic setting, water management institutions, competing water-use demands as well as producersâ?? attitudes, beliefs, and values) and how these influences relate to bioenergy feedstock production and biofuel processing; 4. To determine the relative importance of social-cultural, environmental and/or economic factors in the promotion of biofuels development and expansion in rural communities; The research objectives were met through the completion of six detailed case studies of rural communities that are current or planned locations for ethanol biorefineries. Of the six case studies, two will be conducted on rural communities in Iowa and four will be conducted on rural communities in Kansas. A â??multi-methodâ?ť or â??mixed methodâ?ť research methodology was employed for each case study.

  12. Drought-tolerant Biofuel Crops could be a Critical Hedge for Biorefineries

    E-Print Network [OSTI]

    Morrow, III, William R.

    2013-01-01

    Criteria for Sustainable Biofuel Production, Version 2.0.sustainability concepts in biofuel supply chain management:of switchgrass-for-biofuel systems. Biomass & Bioenergy,

  13. Zymomonas with improved ethanol production in medium containing concentrated sugars and acetate

    DOE Patents [OSTI]

    Caimi, Perry G. (Kennett Square, PA); Chou, Yat-Chen (Lakewood, CO); Franden, Mary Ann (Centennial, CO); Knoke, Kyle (Newark, DE); Tao, Luan (Havertown, PA); Viitanen, Paul V. (West Chester, PA); Zhang, Min (Lakewood, CO); Zhang, Yuying (New Hope, PA)

    2010-09-28

    Through screening of a Zymomonas mutant library the himA gene was found to be involved in the inhibitory effect of acetate on Zymomonas performance. Xylose-utilizing Zymomonas further engineered to reduce activity of the himA gene were found to have increased ethanol production in comparison to a parental strain, when cultured in medium comprising xylose and acetate.

  14. Global Indirect Effects of U.S. Corn Ethanol Production: A Review of the Evidence

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    change issues at the Center for Energy Research and Development (CERD), Nigeria from 1991-1996. HeGlobal Indirect Effects of U.S. Corn Ethanol Production: A Review of the Evidence Energy security to gasoline over the next few decades. Specifically, the Energy Independence and Security Act of 2007 (EISA

  15. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

    Energy Savers [EERE]

    Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from...

  16. Danielle Goldtooth Paper #6 -Biofuels

    E-Print Network [OSTI]

    Lega, Joceline

    Jon Kroc Danielle Goldtooth IS 195A Paper #6 - Biofuels Green Dreams In the modern era science has. Biofuels are increasingly becoming viable alternatives to gasoline, diesel, and other non-renewable fuels." There are still many issues that must be dealt with before the production of biofuels is energy-efficient enough

  17. Algal Biofuels Fact Sheet

    SciTech Connect (OSTI)

    2009-10-27

    This fact sheet provides information on algal biofuels, which are generating considerable interest around the world. They may represent a sustainable pathway for helping to meet the U.S. biofuel production targets set by the Energy Independence and Security Act of 2007.

  18. Simulating and evaluating best management practices for integrated landscape management scenarios in biofuel feedstock production

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ha, Miae; Wu, May

    2015-09-08

    Sound crop and land management strategies can maintain land productivity and improve the environmental sustainability of agricultural crop and feedstock production. With this study, it evaluates a strategy of incorporating landscape design and management concepts into bioenergy feedstock production. It examines the effect of land conversion and agricultural best management practices (BMPs) on water quality (nutrients and suspended sediments) and hydrology. The strategy was applied to the watershed of the South Fork Iowa River in Iowa, where the focus was on converting low-productivity land to provide cellulosic biomass and implementing riparian buffers. The Soil and Water Assessment Tool (SWAT) wasmore »employed to simulate the impact at watershed and sub-basin scales. The study compared the representation of buffers by using trapping efficiency and area ratio methods in SWAT. Landscape design and management scenarios were developed to quantify water quality under (i) current land use, (ii) partial land conversion to switchgrass, and (iii) riparian buffer implementation. Results show that implementation of vegetative barriers and riparian buffer can trap the loss of total nitrogen, total phosphorus, and sediment significantly. The effect increases with the increase of buffer area coverage. Implementing riparian buffer at 30 m width is able to produce 4 million liters of biofuels. When low-productivity land (15.2% of total watershed land area) is converted to grow switchgrass, suspended sediment, total nitrogen, total phosphorus, and nitrate loadings are reduced by 69.3%, 55.5%, 46.1%, and 13.4%, respectively. The results highlight the significant role of lower-productivity land and buffers in cellulosic biomass and provide insights into the design of an integrated landscape with a conservation buffer for future bioenergy feedstock production.« less

  19. Biological production of ethanol from waste gases with Clostridium ljungdahlii

    DOE Patents [OSTI]

    Gaddy, James L. (Fayetteville, AR)

    2000-01-01

    A method and apparatus for converting waste gases from industrial processes such as oil refining, carbon black, coke, ammonia, and methanol production, into useful products is disclosed. The method includes introducing the waste gases into a bioreactor where they are fermented to various product, such as organic acids, alcohols H.sub.2, SCP, and salts of organic acids by anaerobic bacteria within the bioreactor. These valuable end products are then recovered, separated and purified.

  20. Metabolic Engineering of Clostridium thermocellum for Biofuel Production (2013 DOE JGI Genomics of Energy and Environment 8th Annual User Meeting)

    SciTech Connect (OSTI)

    Guess, Adam [ORNL

    2013-03-01

    Adam Guss of Oak Ridge National Lab on "Metabolic engineering of Clostridium thermocellum for biofuel production" at the 8th Annual Genomics of Energy & Environment Meeting on March 28, 2013 in Walnut Creek, Calif.

  1. Production of ethanol by immobilized Saccharomyces bayanus in an extractive fermentation system

    SciTech Connect (OSTI)

    Barros, M.R.A.; Cabral, J.M.S.; Novais, J.M.

    1987-01-01

    An extractive fermentation system using immobilized yeast cells was developed to study the ethanol production at high sugar concentrations. Organic acids were used as extracting solvents of ethanol and their toxicity was tested in free and k-carrageenan entrapped cell preparations. Immobilization seems to protect cells against solvent toxicity, when long-chain organic acids, e.g., oleic acid, were used, probably due to steric and diffusional limitations, the free cells not being viable at high oleic acid concentrations. The entrapped cells also present a high metabolic activity than their free counterparts at high glucose concentrations. A solution of 300 g/L of glucose was totally fermented by the immobilized yeast cells, which when free cannot normally convert more than 200 g/L. In situ recovery of ethanol by oleic acid in a batch immobilized cell system led to higher ethanol productivities and to the fermentation of 400 g/L, when an oleic acid/medium ratio of 5 was used.

  2. DOE Selects Five Ethanol Conversion Projects for $23 Million...

    Broader source: Energy.gov (indexed) [DOE]

    of 35 billion gallons of ethanol a year by 2017. Funding for these projects, an integral part of the President's Biofuels Initiative, will enable biorefineries to produce...

  3. Triacylglycerol Production from Corn Stover Using a Xylose-Fermenting Rhodococcus opacus Strain for Lignocellulosic Biofuels

    E-Print Network [OSTI]

    Kurosawa, Kazuhiko

    Triacylglycerols (TAGs) are in the spotlight as a feasible source of hydrocarbon-based biofuels. Rhodococcus opacus PD630 produces large amounts of intracellular TAGs in cultivations containing high concentrations of ...

  4. Bio-Economic Analyses of Biofuel-Based Integrated Farm Drainage Management Systems on Marginal Land in a Salinity and Drainage Impacted Region: The Case of California's Central Valley

    E-Print Network [OSTI]

    Levers, Lucia

    2015-01-01

    recovery versus biofuel production.. Env. Sci and Tech. 49:An assessment of biofuel production from perennial grassesfuel production. However, biofuel production using crops has

  5. Simultaneous Saccharification and Fermentation of Dry-grind Highly Digestible Grain Sorghum Lines for Ethanol Production 

    E-Print Network [OSTI]

    Hernandez, Joan R.

    2010-07-14

    digestibility and corn; and 2. determine the best sorghum lines that have been developed by breeders that will require lower energy input during gelatinization and liquefaction and shorter SSF time for ethanol production. 7 CHAPTER... to explain this low digestibility and high energy requirements needed for gelatinization prior to liquefaction and saccharification. The predominant theory is that the starch being imbedded in the protein body (kafirin) matrices restricts gelatinization...

  6. Zymomonas with improved ethanol production in medium containing concentrated sugars and acetate

    DOE Patents [OSTI]

    Caimi, Perry G. (Kennett Square, PA); Chou, Yat-Chen (Lakewood, CO); Franden, Mary Ann (Centennial, CO); Knoke, Kyle (Newark, DE); Tao, Luan (Havertown, PA); Viitanen, Paul V. (West Chester, PA); Zhang, Min (Lakewood, CO); Zhang, Yuying (New Hope, PA)

    2011-03-01

    Through screening of a Zymomonas mutant library the himA gene was found to be involved in the inhibitory effect of acetate on Zymomonas performance. Xylose-utilizing Zymomonas strains further engineered to reduce activity of the himA gene were found to have increased ethanol production in comparison to a parental strain, when cultured in mixed-sugars medium comprising xylose, and, in particular, in the presence of acetate.

  7. Biofuels `101'Michael Wilcox, Dayton Lambert and Kelly Tiller Assistant Professors, Department of Agricultural Economics

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    Biofuels `101'Michael Wilcox, Dayton Lambert and Kelly Tiller Assistant Professors, Department vehicle emissions. Biofuels Non-petroleum sources of transportation fuels include natu- ral gas (2.2 percent) and biofuels (1.1 percent). While used in small amounts now, demand for biofuels (ethanol

  8. Legislating Biofuels in the United States (Presentation)

    SciTech Connect (OSTI)

    Clark, W.

    2008-07-01

    Legislation supporting U.S. biofuels production can help to reduce petroleum consumption and increase the nation's energy security.

  9. YOKAYO BIOFUELS, INC. GRANT FOR IMPROVEMENTS AND EXPANSION OF

    E-Print Network [OSTI]

    YOKAYO BIOFUELS, INC. GRANT FOR IMPROVEMENTS AND EXPANSION OF AN EXISTING FACILITY INITIAL STUDY-11-601) to expand an existing biofuels production facility (Yokayo Biofuels, Inc.) located at 350 Orr: THE PROPOSED PROJECT: Yokayo Biofuels, Inc. is an existing biofuels facility located at 350 Orr Springs Road

  10. Potential Land Use Implications of a Global Biofuels Industry

    E-Print Network [OSTI]

    Gurgel, Angelo C.

    In this paper we investigate the potential production and implications of a global biofuels industry. We

  11. High Speed/ Low Effluent Process for Ethanol

    SciTech Connect (OSTI)

    M. Clark Dale

    2006-10-30

    n this project, BPI demonstrated a new ethanol fermentation technology, termed the High Speed/ Low Effluent (HS/LE) process on both lab and large pilot scale as it would apply to wet mill and/or dry mill corn ethanol production. The HS/LE process allows very rapid fermentations, with 18 to 22% sugar syrups converted to 9 to 11% ethanol ‘beers’ in 6 to 12 hours using either a ‘consecutive batch’ or ‘continuous cascade’ implementation. This represents a 5 to 8X increase in fermentation speeds over conventional 72 hour batch fermentations which are the norm in the fuel ethanol industry today. The ‘consecutive batch’ technology was demonstrated on a large pilot scale (4,800 L) in a dry mill corn ethanol plant near Cedar Rapids, IA (Xethanol Biofuels). The pilot demonstrated that 12 hour fermentations can be accomplished on an industrial scale in a non-sterile industrial environment. Other objectives met in this project included development of a Low Energy (LE) Distillation process which reduces the energy requirements for distillation from about 14,000 BTU/gal steam ($0.126/gal with natural gas @ $9.00 MCF) to as low as 0.40 KW/gal electrical requirements ($0.022/gal with electricity @ $0.055/KWH). BPI also worked on the development of processes that would allow application of the HS/LE fermentation process to dry mill ethanol plants. A High-Value Corn ethanol plant concept was developed to produce 1) corn germ/oil, 2) corn bran, 3) ethanol, 4) zein protein, and 5) nutritional protein, giving multiple higher value products from the incoming corn stream.

  12. Biofuel Basics

    Broader source: Energy.gov [DOE]

    Biofuels are liquid or gaseous fuels produced from biomass. Most biofuels are used for transportation, but some are used as fuels to produce electricity. The expanded use of biofuels offers an array of benefits for our energy security, economic growth, and environment.

  13. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report

    SciTech Connect (OSTI)

    Hewlett, E.M.; Erickson, M.V.; Ferguson, C.D.; Sherwood, P.B.; Boswell, B.S.; Walter, K.M.; Hart, M.L.

    1983-07-01

    The purpose of this study is to assess the commercial feasibility of producing between 76 and 189 million liters (20 and 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (KGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber. Both of these industries can provide feedstock for the production of ethanol.

  14. ETHANOL PRODUCTION FROM DIFFERENT CARBON SOURCES USING ANAEROBICALLY DIGESTED AND WETOXIDISED MANURE AS NUTRIENT AND WATER SUPPLY

    E-Print Network [OSTI]

    gasses, great interest has arisen in production of biofuels. The idea of combining biogas and bioethanol and water in industry is a rather expensive medium. The remaining liquid after the biogas process is waste to pollution of ground waters. Furthermore the biogas process does not kill all pathogens. Anaerobically

  15. Regional Algal Biofuel Production Potential in the Coterminous United States as Affected by Resource Availability Trade-offs

    SciTech Connect (OSTI)

    Venteris, Erik R.; Skaggs, Richard; Wigmosta, Mark S.; Coleman, Andre M.

    2014-03-15

    The warm sunny climate and unoccupied arid lands in the American southwest are favorable factors for algae cultivation. However, additional resources affect the overall viability of specific sites and regions. We investigated the tradeoffs between growth rate, water, and CO2 availability and costs for two strains: N. salina and Chlorella sp. We conducted site selection exercises (~88,000 US sites) to produce 21 billion gallons yr-1 (BGY) of renewable diesel (RD). Experimental trials from the National Alliance for Advanced Biofuels and Bio-Products (NAABB) team informed the growth model of our Biomass Assessment Tool (BAT). We simulated RD production by both lipid extraction and hydrothermal liquefaction. Sites were prioritized by the net value of biofuel minus water and flue gas costs. Water cost models for N. salina were based on seawater and high salinity groundwater and for Chlorella, fresh and brackish groundwater. CO2 costs were based on a flue gas delivery model. Selections constrained by production and water were concentrated along the Gulf of Mexico and southeast Atlantic coasts due to high growth rates and low water costs. Adding flue gas constraints increased the spatial distribution, but the majority of sites remained in the southeast. The 21 BGY target required ~3.8 million hectares of mainly forest (41.3%) and pasture (35.7%). Exclusion in favor of barren and scrub lands forced most production to the southwestern US, but with increased water consumption (5.7 times) and decreased economic efficiency (-38%).

  16. Impact of demand-enhancing farm policy on the agricultural sector: a firm level simulation of ethanol production subsidies 

    E-Print Network [OSTI]

    Wasson, Leta Susanne

    1990-01-01

    to a 60 cent per gallon subsidy on each gallon of ethanol blended with gasoline. Other federal incentives include the Crude Oil Windfall Profit Tax of 1980 which gave blenders of ethanol an income tax credit and extended the gasoline tax exemption... subsidies providing for all off- highway uses of diesel fuel and gasoline to be exempt from Federal Excise taxes. Also, the Federal Crop Insurance Corporation has provided insurance against production losses due to weather and other perils at subsidized...

  17. NREL: News Feature - NREL Science Central to Success of New Biofuels...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NREL Science Central to Success of New Biofuels Projects: DuPont-NREL Partnership Delivered Key Innovations for Large Scale Cellulosic Ethanol Facility in Iowa February 23, 2015...

  18. LIQUID BIO-FUEL PRODUCTION FROM NON-FOOD BIOMASS VIA HIGH TEMPERATURE STEAM ELECTROLYSIS

    SciTech Connect (OSTI)

    G. L. Hawkes; J. E. O'Brien; M. G. McKellar

    2011-11-01

    Bio-Syntrolysis is a hybrid energy process that enables production of synthetic liquid fuels that are compatible with the existing conventional liquid transportation fuels infrastructure. Using biomass as a renewable carbon source, and supplemental hydrogen from high-temperature steam electrolysis (HTSE), bio-syntrolysis has the potential to provide a significant alternative petroleum source that could reduce US dependence on imported oil. Combining hydrogen from HTSE with CO from an oxygen-blown biomass gasifier yields syngas to be used as a feedstock for synthesis of liquid transportation fuels via a Fischer-Tropsch process. Conversion of syngas to liquid hydrocarbon fuels, using a biomass-based carbon source, expands the application of renewable energy beyond the grid to include transportation fuels. It can also contribute to grid stability associated with non-dispatchable power generation. The use of supplemental hydrogen from HTSE enables greater than 90% utilization of the biomass carbon content which is about 2.5 times higher than carbon utilization associated with traditional cellulosic ethanol production. If the electrical power source needed for HTSE is based on nuclear or renewable energy, the process is carbon neutral. INL has demonstrated improved biomass processing prior to gasification. Recyclable biomass in the form of crop residue or energy crops would serve as the feedstock for this process. A process model of syngas production using high temperature electrolysis and biomass gasification is presented. Process heat from the biomass gasifier is used to heat steam for the hydrogen production via the high temperature steam electrolysis process. Oxygen produced form the electrolysis process is used to control the oxidation rate in the oxygen-blown biomass gasifier. Based on the gasifier temperature, 94% to 95% of the carbon in the biomass becomes carbon monoxide in the syngas (carbon monoxide and hydrogen). Assuming the thermal efficiency of the power cycle for electricity generation is 50%, (as expected from GEN IV nuclear reactors), the syngas production efficiency ranges from 70% to 73% as the gasifier temperature decreases from 1900 K to 1500 K. Parametric studies of system pressure, biomass moisture content and low temperature alkaline electrolysis are also presented.

  19. Life-cycle energy and GHG emissions of forest biomass harvest and transport for biofuel production in Michigan

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhang, Fengli; Johnson, Dana M.; Wang, Jinjiang

    2015-04-01

    High dependence on imported oil has increased U.S. strategic vulnerability and prompted more research in the area of renewable energy production. Ethanol production from renewable woody biomass, which could be a substitute for gasoline, has seen increased interest. This study analysed energy use and greenhouse gas emission impacts on the forest biomass supply chain activities within the State of Michigan. A life-cycle assessment of harvesting and transportation stages was completed utilizing peer-reviewed literature. Results for forest-delivered ethanol were compared with those for petroleum gasoline using data specific to the U.S. The analysis from a woody biomass feedstock supply perspective uncoveredmore »that ethanol production is more environmentally friendly (about 62% less greenhouse gas emissions) compared with petroleum based fossil fuel production. Sensitivity analysis was conducted with key inputs associated with harvesting and transportation operations. The results showed that research focused on improving biomass recovery efficiency and truck fuel economy further reduced GHG emissions and energy consumption.« less

  20. Life-cycle energy and GHG emissions of forest biomass harvest and transport for biofuel production in Michigan

    SciTech Connect (OSTI)

    Zhang, Fengli; Johnson, Dana M.; Wang, Jinjiang

    2015-04-01

    High dependence on imported oil has increased U.S. strategic vulnerability and prompted more research in the area of renewable energy production. Ethanol production from renewable woody biomass, which could be a substitute for gasoline, has seen increased interest. This study analysed energy use and greenhouse gas emission impacts on the forest biomass supply chain activities within the State of Michigan. A life-cycle assessment of harvesting and transportation stages was completed utilizing peer-reviewed literature. Results for forest-delivered ethanol were compared with those for petroleum gasoline using data specific to the U.S. The analysis from a woody biomass feedstock supply perspective uncovered that ethanol production is more environmentally friendly (about 62% less greenhouse gas emissions) compared with petroleum based fossil fuel production. Sensitivity analysis was conducted with key inputs associated with harvesting and transportation operations. The results showed that research focused on improving biomass recovery efficiency and truck fuel economy further reduced GHG emissions and energy consumption.

  1. A New Biofuels Technology Blooms in Iowa

    Broader source: Energy.gov [DOE]

    Cellulosic biofuels made from agricultural waste have caught the attention of many farmers and could be the next revolution in renewable biofuels production. This video shows how an innovative...

  2. A New Biofuels Technology Blooms in Iowa

    SciTech Connect (OSTI)

    Mathisen, Todd; Bruch, Don

    2010-01-01

    Cellulosic biofuels made from agricultural waste have caught the attention of many farmers and could be the next revolution in renewable biofuels production. This video shows how an innovative technology that converts waste products from the corn harvest into renewable biofuels will help the U.S. produce billions of gallons of cellulosic biofuels over the coming decade. It will also stimulate local economies and reduce U.S. dependence on foreign oil.

  3. A New Biofuels Technology Blooms in Iowa

    ScienceCinema (OSTI)

    Mathisen, Todd; Bruch, Don;

    2013-05-29

    Cellulosic biofuels made from agricultural waste have caught the attention of many farmers and could be the next revolution in renewable biofuels production. This video shows how an innovative technology that converts waste products from the corn harvest into renewable biofuels will help the U.S. produce billions of gallons of cellulosic biofuels over the coming decade. It will also stimulate local economies and reduce U.S. dependence on foreign oil.

  4. The Impact of Ethanol Production on U.S. and Regional Gasoline Prices and on the Profitability of the U.S. Oil Refinery Industry

    SciTech Connect (OSTI)

    Du, Xiaodong; Hayes, Dermot J.

    2008-04-01

    This report details pooled regional time-series data and panel data estimation used to quantify the impact of monthly ethanol production on monthly retail regular gasoline prices.

  5. Regional, economic, and environmental effects of traditional and biotechnologically enhanced ethanol production processes in Brazil

    E-Print Network [OSTI]

    Guerrero Compeán, Roberto

    2008-01-01

    Climate change, food security, and energy efficiency have become universal challenges for global economic development and environmental conservation that demand in-depth multidisciplinary research. Biofuels have emerged ...

  6. Sources of Corn for Ethanol Production in the United States: A Review and Decomposition Analysis of the Empirical Data

    SciTech Connect (OSTI)

    Oladosu, Gbadebo A [ORNL; Kline, Keith L [ORNL; Uria Martinez, Rocio [ORNL; Eaton, Laurence M [ORNL

    2011-01-01

    The use of corn for ethanol production in the United States quintupled between 2001 and 2009, generating concerns that this could lead to the conversion of forests and grasslands around the globe, known as indirect land-use change (iLUC). Estimates of iLUC and related food versus fuel concerns rest on the assumption that the corn used for ethanol production in the United States would come primarily from displacing corn exports and land previously used for other crops. A number of modeling efforts based on these assumptions have projected significant iLUC from the increases in the use of corn for ethanol production. The current study tests the veracity of these assumptions through a systematic decomposition analysis of the empirical data from 2001 to 2009. The logarithmic mean divisia index decomposition method (Type I) was used to estimate contributions of different factors to meeting the corn demand for ethanol production. Results show that about 79% of the change in corn used for ethanol production can be attributed to changes in the distribution of domestic corn consumption among different uses. Increases in the domestic consumption share of corn supply contributed only about 5%. The remaining contributions were 19% from added corn production, and 2% from stock changes. Yield change accounted for about two-thirds of the contributions from production changes. Thus, the results of this study provide little support for large land-use changes or diversion of corn exports because of ethanol production in the United States during the past decade.

  7. Turning Bacteria into Fuel: Cyanobacteria Designed for Solar-Powered Highly Efficient Production of Biofuels

    SciTech Connect (OSTI)

    None

    2010-01-01

    Broad Funding Opportunity Announcement Project: ASU is engineering a type of photosynthetic bacteria that efficiently produce fatty acids—a fuel precursor for biofuels. This type of bacteria, called Synechocystis, is already good at converting solar energy and carbon dioxide (CO2) into a type of fatty acid called lauric acid. ASU has modified the organism so it continuously converts sunlight and CO2 into fatty acids—overriding its natural tendency to use solar energy solely for cell growth and maximizing the solar-to-fuel conversion process. ASU’s approach is different because most biofuels research focuses on increasing cellular biomass and not on excreting fatty acids. The project has also identified a unique way to convert the harvested lauric acid into a fuel that can be easily blended with existing transportation fuels.

  8. Direct Conversion of Plant Biomass to Ethanol by Engineered Caldicellulosiruptor bescii

    SciTech Connect (OSTI)

    Chung, Daehwan; Cha, Minseok; Guss, Adam M; Westpheling, Janet

    2014-01-01

    Ethanol is the most widely used renewable transportation biofuel in the United States, with the production of 13.3 billion gallons in 2012 [John UM (2013) Contribution of the Ethanol Industry to the Economy of the United States]. Despite considerable effort to produce fuels from lignocellulosic biomass, chemical pretreatment and the addition of saccharolytic enzymes before microbial bioconversion remain economic barriers to industrial deployment [Lynd LR, et al. (2008) Nat Biotechnol 26(2):169-172]. We began with the thermophilic, anaerobic, cellulolytic bacterium Caldicellulosiruptor bescii, which efficiently uses unpretreated biomass, and engineered it to produce ethanol. Here we report the direct conversion of switchgrass, a nonfood, renewable feedstock, to ethanol without conventional pretreatment of the biomass. This process was accomplished by deletion of lactate dehydrogenase and heterologous expression of a Clostridium thermocellum bifunctional acetaldehyde/alcohol dehydrogenase. Whereas wild-type C. bescii lacks the ability to make ethanol, 70% of the fermentation products in the engineered strain were ethanol [12.8 mM ethanol directly from 2% (wt/vol) switchgrass, a real-world substrate] with decreased production of acetate by 38% compared with wild-type. Direct conversion of biomass to ethanol represents a new paradigm for consolidated bioprocessing, offering the potential for carbon neutral, cost-effective, sustainable fuel production.

  9. Due to depletion of oil resources, increasing fuel prices and environmental issues associated with burning of fossil fuels, extensive research has been performed in biofuel production and dramatic progress has

    E-Print Network [OSTI]

    Due to depletion of oil resources, increasing fuel prices and environmental issues associated with burning of fossil fuels, extensive research has been performed in biofuel production and dramatic progress has been made. But still problems exist in economically production of biofuels. One major problem

  10. Recovery of near-anhydrous ethanol as gasoline additive from fermentation products

    SciTech Connect (OSTI)

    Boukouvalas, C.; Markoulaki, E.; Magoulas, K.; Tassios, D. [National Technical Univ. of Athens (Greece)

    1995-06-01

    The use of near-anhydrous ethanol, obtained from fermentation products through low pressure distillation, as a gasoline additive is examined. To this purpose, a reliable model for predicting the azeotropic composition of an ethanol-water mixture as a function of the pressure is presented. It is developed by considering the available thermodynamic consistent experimental data and using the Wilson and the virial equations for the liquid-and vapor-phase nonideality, respectively. It is concluded that, for an area with no extremely cold winters-minimum ambient temperature -20{degrees}C-alcohol with 96.5%(wt) purity can be used in a 90/10 (vol) gasohol mixture. Such an alcohol can be produced with a single distillation column operating at 140 mmHg pressure with an energy consumption of 5150 kJ/kg of product; or with a system of two columns with lower energy consumption but higher capital cost. These energy consumptions are very sensitive to the accuracy of the predicted azeotropic composition at the operating pressures.

  11. Pilot Scale Integrated Biorefinery for Producing Ethanol from Hybrid Algae: Cooperative Research and Development Final Report, CRADA Number CRD-10-389

    SciTech Connect (OSTI)

    Pienkos, P. T.

    2013-11-01

    This collaboration between Algenol Biofuels Inc. and NREL will provide valuable information regarding Direct to Ethanol technology. Specifically, the cooperative R&D will analyze the use of flue gas from industrial sources in the Direct to Ethanol process, which may demonstrate the potential to significantly reduce greenhouse gas emissions while simultaneously producing a valuable product, i.e., ethanol. Additionally, Algenol Biofuels Inc. and NREL will develop both a techno-economic model with full material and energy balances and an updated life-cycle analysis to identify greenhouse gas emissions relative to gasoline, each of which will provide a better understanding of the Direct to Ethanol process and further demonstrate that it is a breakthrough technology with varied and significant benefits.

  12. Mascoma Announces Major Cellulosic Biofuel Technology Breakthrough

    E-Print Network [OSTI]

    Mascoma Announces Major Cellulosic Biofuel Technology Breakthrough Lebanon, NH - May 7, 2009 bioprocessing, or CBP, a low-cost processing strategy for production of biofuels from cellulosic biomass. CBP much, much closer to billions of gallons of low cost cellulosic biofuels," said Michigan State

  13. SEE ALSO SIDEBARS: RECOURCES SOLARRESOURCES BIOMASS & BIOFUELS

    E-Print Network [OSTI]

    Kammen, Daniel M.

    373 SEE ALSO SIDEBARS: RECOURCES · SOLARRESOURCES · BIOMASS & BIOFUELS Engineered and Artificial, and the production of liquid biofuels for transportation is growing rapidly. However, both traditional biomass energy and crop-based biofuels technologies have negative environmental and social impacts. The overall research

  14. IMPROVED BIOREFINERY FOR THE PRODUCTION OF ETHANOL, CHEMICALS, ANIMAL FEED AND BIOMATERIALS FROM SUGAR CANE

    SciTech Connect (OSTI)

    Dr. Donal F. Day

    2009-01-29

    The Audubon Sugar Institute (ASI) of Louisiana State University’s Agricultural Center (LSU AgCenter) and MBI International (MBI) sought to develop technologies that will lead to the development of a sugar-cane biorefinery, capable of supplying fuel ethanol from bagasse. Technology development focused on the conversion of bagasse, cane-leaf matter (CLM) and molasses into high value-added products that included ethanol, specialty chemicals, biomaterials and animal feed; i.e. a sugar cane-based biorefinery. The key to lignocellulosic biomass utilization is an economically feasible method (pretreatment) for separating the cellulose and the hemicellulose from the physical protection provided by lignin. An effective pretreatment disrupts physical barriers, cellulose crystallinity, and the association of lignin and hemicellulose with cellulose so that hydrolytic enzymes can access the biomass macrostructure (Teymouri et al. 2004, Laureano-Perez, 2005). We chose to focus on alkaline pretreatment methods for, and in particular, the Ammonia Fiber Expansion (AFEX) process owned by MBI. During the first two years of this program a laboratory process was established for the pretreatment of bagasse and CLM using the AFEX process. There was significant improvement of both rate and yield of glucose and xylose upon enzymatic hydrolysis of AFEX-treated bagasse and CLM compared with untreated material. Because of reactor size limitation, several other alkaline pretreatment methods were also co-investigated. They included, dilute ammonia, lime and hydroxy-hypochlorite treatments. Scale-up focused on using a dilute ammonia process as a substitute for AFEX, allowing development at a larger scale. The pretreatment of bagasse by an ammonia process, followed by saccharification and fermentation produced ethanol from bagasse. Simultaneous saccharification and fermentation (SSF) allowed two operations in the same vessel. The addition of sugarcane molasses to the hydrolysate/fermentation process yielded improvements beyond what was expected solely from the addition of sugar. In order to expand the economic potential for building a biorefinery, the conversion of enzyme hydrolysates of AFEX-treated bagasse to succinic acid was also investigated. This program established a solid basis for pre-treatment of bagasse in a manner that is feasible for producing ethanol at raw sugar mills.

  15. Bioproducts to Enable Biofuels Workshop

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Bioenergy Technologies Office (BETO) is hosting the one-day Bioproducts to Enable Biofuels Workshop on July 16, 2015, in Westminster, Colorado. BETO is seeking to collect information from key industry, university, and national laboratory stakeholders, regarding the challenges associated with the coproduction of biomass derived chemicals and products alongside biofuels.

  16. Production of Advanced Biofuels via Liquefaction Hydrothermal Liquefaction Reactor Design: April 5, 2013

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding accessby aLEDSpeeding accessSpeedingPATENTS- 05TheAdvanced Biofuels

  17. Utilization of Ash Fractions from Alternative Biofuels used in Power Plants

    E-Print Network [OSTI]

    Utilization of Ash Fractions from Alternative Biofuels used in Power Plants PSO Project No. 6356 July 2008 Renewable Energy and Transport #12;2 Utilization of Ash Fractions from Alternative Biofuels)...............................................................................7 2. Production of Ash Products from Mixed Biofuels

  18. The effect of biofuel on the international oil market

    E-Print Network [OSTI]

    Hochman, Gal; Rajagopal, Deepak; Zilberman, David D.

    2010-01-01

    whereas a gallon of biodiesel is equivalent to 1.04 gallonsthat global ethanol and biodiesel GEG equal 10.9 billionto crude oil, biofuels, and biodiesel, and does not include

  19. Lifecycle Analyses of Biofuels

    E-Print Network [OSTI]

    Delucchi, Mark

    2006-01-01

    08 Lifecycle Analyses of Biofuels Draft Report (May be citedLIFECYCLE ANALYSES OF BIOFUELS Draft manuscript (may belifecycle analysis (LCA) of biofuels for transportation has

  20. Energy and greenhouse gas emission effects of corn and cellulosic ethanol with technology improvements and land use changes.

    SciTech Connect (OSTI)

    Wang, M.; Han, J.; Haq, Z; Tyner, .W.; Wu, M.; Elgowainy, A.

    2011-05-01

    Use of ethanol as a transportation fuel in the United States has grown from 76 dam{sup 3} in 1980 to over 40.1 hm{sup 3} in 2009 - and virtually all of it has been produced from corn. It has been debated whether using corn ethanol results in any energy and greenhouse gas benefits. This issue has been especially critical in the past several years, when indirect effects, such as indirect land use changes, associated with U.S. corn ethanol production are considered in evaluation. In the past three years, modeling of direct and indirect land use changes related to the production of corn ethanol has advanced significantly. Meanwhile, technology improvements in key stages of the ethanol life cycle (such as corn farming and ethanol production) have been made. With updated simulation results of direct and indirect land use changes and observed technology improvements in the past several years, we conducted a life-cycle analysis of ethanol and show that at present and in the near future, using corn ethanol reduces greenhouse gas emission by more than 20%, relative to those of petroleum gasoline. On the other hand, second-generation ethanol could achieve much higher reductions in greenhouse gas emissions. In a broader sense, sound evaluation of U.S. biofuel policies should account for both unanticipated consequences and technology potentials. We maintain that the usefulness of such evaluations is to provide insight into how to prevent unanticipated consequences and how to promote efficient technologies with policy intervention.

  1. National Algal Biofuels Technology Roadmap

    SciTech Connect (OSTI)

    Ferrell, John; Sarisky-Reed, Valerie

    2010-05-01

    The framework for National Algal Biofuels Technology Roadmap was constructed at the Algal Biofuels Technology Roadmap Workshop, held December 9-10, 2008, at the University of Maryland-College Park. The Workshop was organized by the Biomass Program to discuss and identify the critical challenges currently hindering the development of a domestic, commercial-scale algal biofuels industry. This Roadmap presents information from a scientific, economic, and policy perspectives that can support and guide RD&D investment in algal biofuels. While addressing the potential economic and environmental benefits of using algal biomass for the production of liquid transportation fuels, the Roadmap describes the current status of algae RD&D. In doing so, it lays the groundwork for identifying challenges that likely need to be overcome for algal biomass to be used in the production of economically viable biofuels.

  2. Engineering microbes to produce biofuels

    SciTech Connect (OSTI)

    Wackett, LP

    2011-06-01

    The current biofuels landscape is chaotic. It is controlled by the rules imposed by economic forces and driven by the necessity of finding new sources of energy, particularly motor fuels. The need is bringing forth great creativity in uncovering new candidate fuel molecules that can be made via metabolic engineering. These next generation fuels include long-chain alcohols, terpenoid hydrocarbons, and diesel-length alkanes. Renewable fuels contain carbon derived from carbon dioxide. The carbon dioxide is derived directly by a photosynthetic fuel-producing organism(s) or via intermediary biomass polymers that were previously derived from carbon dioxide. To use the latter economically, biomass depolymerization processes must improve and this is a very active area of research. There are competitive approaches with some groups using enzyme based methods and others using chemical catalysts. With the former, feedstock and end-product toxicity loom as major problems. Advances chiefly rest on the ability to manipulate biological systems. Computational and modular construction approaches are key. For example, novel metabolic networks have been constructed to make long-chain alcohols and hydrocarbons that have superior fuel properties over ethanol. A particularly exciting approach is to implement a direct utilization of solar energy to make a usable fuel. A number of approaches use the components of current biological systems, but re-engineer them for more direct, efficient production of fuels.

  3. ORIGINAL ARTICLE Utilization of diets containing graded levels of ethanol

    E-Print Network [OSTI]

    ORIGINAL ARTICLE Utilization of diets containing graded levels of ethanol production co to manufacture fuel ethanol (Rosentrater and Muthukumarappan, 2006). In 2008, 174 operating ethanol plants.1 billion liters (RFA, 2009). With this exponential growth in ethanol production, significant quantities

  4. Biofuels in the U.S. Transportation Sector (released in AEO2007)

    Reports and Publications (EIA)

    2007-01-01

    Sustained high world oil prices and the passage of the Energy Policy Act 2005 (EPACT) have encouraged the use of agriculture-based ethanol and biodiesel in the transportation sector; however, both the continued growth of the biofuels industry and the long-term market potential for biofuels depend on the resolution of critical issues that influence the supply of and demand for biofuels. For each of the major biofuelscorn-based ethanol, cellulosic ethanol, and biodieselresolution of technical, economic, and regulatory issues remains critical to further development of biofuels in the United States.

  5. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    technologies for bioethanol production from lignocellulose.aqueous ammonia for bioethanol production. Methods Mol Biol

  6. Ethanol Can Contribute to Energy and Environmental Goals

    E-Print Network [OSTI]

    Ethanol Can Contribute to Energy and Environmental Goals Alexander E. Farrell,1 * Richard J. Plevin the potential effects of increased biofuel use, we evaluated six representative analyses of fuel ethanol studies indicated that current corn ethanol technologies are much less petroleum-intensive than gasoline

  7. Breaking the Biological Barriers to Cellulosic Ethanol: A Joint Research Agenda

    SciTech Connect (OSTI)

    Houghton, John; Weatherwax, Sharlene; Ferrell, John

    2006-06-07

    The Biomass to Biofuels Workshop, held December 7–9, 2005, was convened by the Department of Energy’s Office of Biological and Environmental Research in the Office of Science; and the Office of the Biomass Program in the Office of Energy Efficiency and Renewable Energy. The purpose was to define barriers and challenges to a rapid expansion of cellulosic-ethanol production and determine ways to speed solutions through concerted application of modern biology tools as part of a joint research agenda. Although the focus was ethanol, the science applies to additional fuels that include biodiesel and other bioproducts or coproducts having critical roles in any deployment scheme.

  8. Biochemical Production of Ethanol from Corn Stover: 2008 State of Technology Model

    SciTech Connect (OSTI)

    Humbird, D.; Aden, A.

    2009-08-01

    An update to the FY 2007 assessment of the state of technical research progress toward biochemical process goals, quantified in terms of Minimum Ethanol Selling Price.

  9. Measuring and moderating the water resource impact of biofuel production and trade

    E-Print Network [OSTI]

    Fingerman, Kevin Robert

    2012-01-01

    Water  from   Production  of  Crude  Oil,  Natural  Gas,  water  required  for  production  of  crude  oil  through  consumption  for  production   of  crude  oil  in  the  

  10. Consolidated Bio-Processing of Cellulosic Biomass for Efficient Biofuel Production Using Yeast Consortium

    E-Print Network [OSTI]

    Goyal, Garima

    2011-01-01

    bioprocessing for bioethanol production using Saccharomycessugars. The cost of bioethanol production has become moredegraded for bioethanol production. However, the high cost

  11. Fuel from wastewater : harnessing a potential energy source in Canada through the co-location of algae biofuel production to sources of effluent, heat and CO2.

    SciTech Connect (OSTI)

    Passell, Howard David; Whalen, Jake (SmartWhale Consulting, Dartmouth, NS, CA); Pienkos, Philip P. (National Renewable Energy Laboratory, Golden, CO); O'Leary, Stephen J. (National Research Council Canada, Institute for Marine Biosciences, Halifax, NS, CA); Roach, Jesse Dillon; Moreland, Barbara D.; Klise, Geoffrey Taylor

    2010-12-01

    Sandia National Laboratories is collaborating with the National Research Council (NRC) Canada and the National Renewable Energy Laboratory (NREL) to develop a decision-support model that will evaluate the tradeoffs associated with high-latitude algae biofuel production co-located with wastewater, CO2, and waste heat. This project helps Canada meet its goal of diversifying fuel sources with algae-based biofuels. The biofuel production will provide a wide range of benefits including wastewater treatment, CO2 reuse and reduction of demand for fossil-based fuels. The higher energy density in algae-based fuels gives them an advantage over crop-based biofuels as the 'production' footprint required is much less, resulting in less water consumed and little, if any conversion of agricultural land from food to fuel production. Besides being a potential source for liquid fuel, algae have the potential to be used to generate electricity through the burning of dried biomass, or anaerobically digested to generate methane for electricity production. Co-locating algae production with waste streams may be crucial for making algae an economically valuable fuel source, and will certainly improve its overall ecological sustainability. The modeling process will address these questions, and others that are important to the use of water for energy production: What are the locations where all resources are co-located, and what volumes of algal biomass and oil can be produced there? In locations where co-location does not occur, what resources should be transported, and how far, while maintaining economic viability? This work is being funded through the U.S. Department of Energy (DOE) Biomass Program Office of Energy Efficiency and Renewable Energy, and is part of a larger collaborative effort that includes sampling, strain isolation, strain characterization and cultivation being performed by the NREL and Canada's NRC. Results from the NREL / NRC collaboration including specific productivities of selected algal strains will eventually be incorporated into this model.

  12. Development of a microbial process for the conversion of carbon dioxide and electricity to higher alcohols as biofuels

    E-Print Network [OSTI]

    Li, Han

    2013-01-01

    Makino K, Sawayama S: Bioethanol production from xylose bymaterial for biofuel production. Bioethanol produced from

  13. Quantitative Analysis of Biofuel Sustainability, Including Land...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    life cycle analysis of biofuels continue to improve 2 Feedstock Production Feedstock Logistics, Storage and Transportation Feedstock Conversion Fuel Transportation and...

  14. Cassava, a potential biofuel crop in China

    E-Print Network [OSTI]

    Jansson, C.

    2010-01-01

    18-673389 Keywords: cassava; bioethanol; biofuel; metabolicRecently, cassava-derived bioethanol production has beenbenefits compared to other bioethanol- producing crops in

  15. The Potential of Cellulosic Ethanol Production from Municipal Solid Waste: A Technical and Economic Evaluation

    E-Print Network [OSTI]

    Shi, Jian; Ebrik, Mirvat; Yang, Bin; Wyman, Charles E.

    2009-01-01

    waste, such as food and kitchen waste, green waste, paper;waste in view of their transformation into ethanol. Belgian Journal of Foodwastes, ADC final, ADC green, acid pretreatment, ethanol, lignin blocking, bovine serum albumin, Aspen model Introduction Overcoming challenges of food

  16. Production of ethanol from refinery waste gases. Phase 3. Engineering development. Annual report, April 1, 1995--May 15, 1996

    SciTech Connect (OSTI)

    Arora, D.; Basu, R.; Phillips, J.R.; Wikstrom, C.V.; Clausen, E.C; Gaddy, J.L.

    1996-11-01

    Refineries discharge large volumes of H2, CO, and CO 2 from cracking, coking, and hydrotreating operations. This R&D program seeks to develop, demonstrate, and commercialize a biological process for converting these waste gases into ethanol for blending with gasoline. A 200,000 BPD refinery could produce up to 38 million gallons ethanol per year. The program is being conducted in 3 phases: II, technology development; III, engineering development; and IV, demonstration. Phase I, exploratory development, has been completed. The research effort has yielded two strains (Isolates O-52 and C-01) which are to be used in the pilot studies to produce ethanol from CO, CO2, and H2 in petroleum waste gas. Results from single continuous stirred tank reactor (CSTR) laboratory tests have shown that 20-25 g/L ethanol can be produced with < 5 g/L acetic acid byproduct. Laboratory studies with two CSTRs in series have yielded ethanol concentrations of 30-35 g/L with 2-4 g/L acetic acid byproduct. Water recycle from distillation back to the fermenter shows that filtration of the water before distillation eliminates the recycle of toxic materials back to the fermenter. Product recovery in the process will use direct distillation to the azeotrope, followed by adsorption to produce neat ethanol. This is less energy intensive than e.g. solvent extraction, azeotropic distillation, or pervaporation. Economic projections are quite attractive; the economics are refinery stream dependent and thus vary depending on refinery location and operation.

  17. California: Cutting-Edge Biofuels Research and Entrepreneurship...

    Energy Savers [EERE]

    viable processes for advanced biofuels and biochemical production from grasses, algae, wood, gases, and agriculturalindustrialmunicipal waste leading to efficient...

  18. Fermentation method producing ethanol

    DOE Patents [OSTI]

    Wang, Daniel I. C. (Belmont, MA); Dalal, Rajen (Chicago, IL)

    1986-01-01

    Ethanol is the major end product of an anaerobic, thermophilic fermentation process using a mutant strain of bacterium Clostridium thermosaccharolyticum. This organism is capable of converting hexose and pentose carbohydrates to ethanol, acetic and lactic acids. Mutants of Clostridium thermosaccharolyticum are capable of converting these substrates to ethanol in exceptionally high yield and with increased productivity. Both the mutant organism and the technique for its isolation are provided.

  19. Ethanol Conversion to Hydrocarbons on HZSM-5: Effect of Reaction Conditions and Si/Al Ratio on the Product Distributions

    SciTech Connect (OSTI)

    Ramasamy, Karthikeyan K.; Wang, Yong

    2014-11-17

    The Conversion of ethanol to hydrocarbon over HZSM-5 zeolite with different Si/Al ratios was investigated under various reaction conditions. The catalyst with a higher Si/Al ratio (low acid density) deactivated faster and generated more unsaturated compounds at a similar time-on-stream. Temperature affects the catalytic activity with respect to liquid hydrocarbon generation and the hydrocarbon product composition. At lower temperatures (~300°C), the catalyst deactivated faster with respect to the liquid hydrocarbon formation. Higher temperatures (~400°C) reduced the formation of liquid range hydrocarbons and formed more gaseous fractions. Weight hourly space velocity was also found to affect product selectivity with higher weight hourly space velocity leading to a higher extent of ethylene formation. The experimental results were analyzed in terms of the product composition and the coke content with respect to catalyst time-on-stream and compared with the catalyst lifetime with respect to the variables tested on the conversion of ethanol to hydrocarbon.

  20. Life of Sugar: Developing Lifecycle Methods to Evaluate the Energy and Environmental Impacts of Sugarcane Biofuels

    E-Print Network [OSTI]

    Gopal, Anand Raja

    2011-01-01

    75 My View on the use of Biofuels in Low Carbon FuelCLCAs of Byproduct-based Biofuels . . . . . . . 49 5 FullLCA GHG Emissions of Biofuels using various Co-product

  1. Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial

    E-Print Network [OSTI]

    Boyer, Edmond

    Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial ainsi que des exemples d'applications industrielles. Abstract -- Transformation of Sorbitol to Biofuels and biodiesel production led to first generation biofuels. Nowadays, research is focused on lignocellulosic

  2. Making Photosynthetic Biofuel Renewable: Recovering Phosphorus from Residual Biomass J. M. Gifford and P. Westerhoff

    E-Print Network [OSTI]

    Hall, Sharon J.

    Making Photosynthetic Biofuel Renewable: Recovering Phosphorus from Residual Biomass J. M. Gifford to global warming. Biofuel from phototrophic microbes like algae and bacteria provides a viable substitute improves biofuel sustainability by refining phosphorus recycling. Biomass Production Residual Biomass

  3. Control and Optimization of Light Transfer in Photobioreactors Used for Biofuel Production

    E-Print Network [OSTI]

    Kandilian, Razmig

    2014-01-01

    Laurens, “Microalgae as biodiesel and biomass feed- stocks:maximizing microalgae growth rate and biomass productivity.rate and biomass productivity of microalgae. Introduction

  4. Global biofuel drive raises risk of eviction for African farmers

    E-Print Network [OSTI]

    alternatives to oil, global biofuel production trebled between 2003 and 2007 and is forecast to double again to the research, said that the allocation of land for biofuel production by government projects or wealthy have forced millions into poverty. Dr Molony said: "The threat that increased biofuel production poses

  5. National Geo-Database for Biofuel Simulations and Regional Analysis

    SciTech Connect (OSTI)

    Izaurralde, Roberto C.; Zhang, Xuesong; Sahajpal, Ritvik; Manowitz, David H.

    2012-04-01

    The goal of this project undertaken by GLBRC (Great Lakes Bioenergy Research Center) Area 4 (Sustainability) modelers is to develop a national capability to model feedstock supply, ethanol production, and biogeochemical impacts of cellulosic biofuels. The results of this project contribute to sustainability goals of the GLBRC; i.e. to contribute to developing a sustainable bioenergy economy: one that is profitable to farmers and refiners, acceptable to society, and environmentally sound. A sustainable bioenergy economy will also contribute, in a fundamental way, to meeting national objectives on energy security and climate mitigation. The specific objectives of this study are to: (1) develop a spatially explicit national geodatabase for conducting biofuel simulation studies; (2) model biomass productivity and associated environmental impacts of annual cellulosic feedstocks; (3) simulate production of perennial biomass feedstocks grown on marginal lands; and (4) locate possible sites for the establishment of cellulosic ethanol biorefineries. To address the first objective, we developed SENGBEM (Spatially Explicit National Geodatabase for Biofuel and Environmental Modeling), a 60-m resolution geodatabase of the conterminous USA containing data on: (1) climate, (2) soils, (3) topography, (4) hydrography, (5) land cover/ land use (LCLU), and (6) ancillary data (e.g., road networks, federal and state lands, national and state parks, etc.). A unique feature of SENGBEM is its 2008-2010 crop rotation data, a crucially important component for simulating productivity and biogeochemical cycles as well as land-use changes associated with biofuel cropping. We used the EPIC (Environmental Policy Integrated Climate) model to simulate biomass productivity and environmental impacts of annual and perennial cellulosic feedstocks across much of the USA on both croplands and marginal lands. We used data from LTER and eddy-covariance experiments within the study region to test the performance of EPIC and, when necessary, improve its parameterization. We investigated three scenarios. In the first, we simulated a historical (current) baseline scenario composed mainly of corn-, soybean-, and wheat-based rotations as grown existing croplands east of the Rocky Mountains in 30 states. In the second scenario, we simulated a modified baseline in which we harvested corn and wheat residues to supply feedstocks to potential cellulosic ethanol biorefineries distributed within the study area. In the third scenario, we simulated the productivity of perennial cropping systems such as switchgrass or perennial mixtures grown on either marginal or Conservation Reserve Program (CRP) lands. In all cases we evaluated the environmental impacts (e.g., soil carbon changes, soil erosion, nitrate leaching, etc.) associated with the practices. In summary, we have reported on the development of a spatially explicit national geodatabase to conduct biofuel simulation studies and provided initial simulation results on the potential of annual and perennial cropping systems to serve as feedstocks for the production of cellulosic ethanol. To accomplish this, we have employed sophisticated spatial analysis methods in combination with the process-based biogeochemical model EPIC. This work provided the opportunity to test the hypothesis that marginal lands can serve as sources of cellulosic feedstocks and thus contribute to avoid potential conflicts between bioenergy and food production systems. This work, we believe, opens the door for further analysis on the characteristics of cellulosic feedstocks as major contributors to the development of a sustainable bioenergy economy.

  6. Regional Differences in Corn Ethanol Production: Profitability and Potential Water Demands 

    E-Print Network [OSTI]

    Higgins, Lindsey M.

    2010-07-14

    to location differences. Changes in consumptive water use in the Texas High Plains, Southern Minnesota, and the Central Valley of California, as impacted by current and proposed grain-based ethanol plants were addressed. In addition, this research assesses...

  7. The Impact of Biofuel and Greenhouse Gas Policies on Land Management, Agricultural Production, and Environmental Quality 

    E-Print Network [OSTI]

    Baker, Justin Scott

    2012-10-19

    emissions and mitigation, commodity prices, production, net exports, sectoral economic welfare, and shifts in management practices and intensity. Direct and indirect consequences of RFS2 and carbon policy are highlighted, including regional production...

  8. Process Design and Economics for the Conversion of Algal Biomass to Biofuels: Algal Biomass Fractionation to Lipid- and Carbohydrate-Derived Fuel Products

    SciTech Connect (OSTI)

    Davis, R.; Kinchin, C.; Markham, J.; Tan, E.; Laurens, L.; Sexton, D.; Knorr, D.; Schoen, P.; Lukas, J.

    2014-09-01

    Beginning in 2013, NREL began transitioning from the singular focus on ethanol to a broad slate of products and conversion pathways, ultimately to establish similar benchmarking and targeting efforts. One of these pathways is the conversion of algal biomass to fuels via extraction of lipids (and potentially other components), termed the 'algal lipid upgrading' or ALU pathway. This report describes in detail one potential ALU approach based on a biochemical processing strategy to selectively recover and convert select algal biomass components to fuels, namely carbohydrates to ethanol and lipids to a renewable diesel blendstock (RDB) product. The overarching process design converts algal biomass delivered from upstream cultivation and dewatering (outside the present scope) to ethanol, RDB, and minor coproducts, using dilute-acid pretreatment, fermentation, lipid extraction, and hydrotreating.

  9. Land-Use Analysis of Croplands for Sustainable Food and Energy Production in the United States

    E-Print Network [OSTI]

    Zumkehr, Andrew Lee

    2013-01-01

    R. ; Balachandra, P. Biofuel Production and Implications forAvailability for Biofuel Production. Environmental Science &Carbon Sequestration or Biofuel Production: New Land-Use

  10. Redesign of metabolic pathways for photosynthetic production of n-butanol using cyanobacteria

    E-Print Network [OSTI]

    Lan, Ethan I.

    2013-01-01

    J.C. , Direct biofuel production from carbon dioxide. (Oralfor direct biofuel production from brown macroalgae. Science2012) Cyanobacterial biofuel production. J Biotechnol. Lan

  11. Biofuels Overview CLIMATETECHBOOK

    E-Print Network [OSTI]

    Page | 1 May 2009 Biofuels Overview CLIMATETECHBOOK What are Biofuels? A biofuel is defined as any dependence on petroleum-based fuels, biofuels are gaining increasing attention as one possible solution. Biofuels offer a way to produce transportation fuels from renewable sources or waste materials and to help

  12. Secretary Bodman Touts Importance of Cellulosic Ethanol at Georgia...

    Broader source: Energy.gov (indexed) [DOE]

    million gallons of cellulosic ethanol per year. Funding for these projects is also an integral part of the President's Biofuels Initiative that will lead to the wide-scale use of...

  13. Consolidated Bio-Processing of Cellulosic Biomass for Efficient Biofuel Production Using Yeast Consortium

    E-Print Network [OSTI]

    Goyal, Garima

    2011-01-01

    bioprocessing for bioethanol production using Saccharomycesconversion to bioethanol in a single bioreactor by b) a CBPof lignocellulose to bioethanol refers to the combining of

  14. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    and T. K. Ghose. 2003. Bioethanol in India: recent past andZhao, and M. Emptage. 2006. Bioethanol. Current Opinion intechnologies for bioethanol production from lignocellulose.

  15. Measuring and moderating the water resource impact of biofuel production and trade

    E-Print Network [OSTI]

    Fingerman, Kevin Robert

    2012-01-01

    world,  use  about  7  million   gallons  of  treated  seawater  per  day  in  the  production  of  about  5  million  barrels  of   crude  oil  (

  16. Biofuels: 1995 project summaries

    SciTech Connect (OSTI)

    NONE

    1996-01-01

    Domestic transportation fuels are derived primarily from petroleum and account for about two-thirds of the petroleum consumption in the United States. In 1994, more than 40% of our petroleum was imported. That percentage is likely to increase, as the Middle East has about 75% of the world`s oil reserves, but the United States has only about 5%. Because we rely so heavily on oil (and because we currently have no suitable substitutes for petroleum-based transportation fuels), we are strategically and economically vulnerable to disruptions in the fuel supply. Additionally, we must consider the effects of petroleum use on the environment. The Biofuels Systems Division (BSD) is part of the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EE). The day-to-day research activities, which address these issues, are managed by the National Renewable Energy Laboratory in Golden, Colorado, and Oak Ridge National Laboratory in Oak Ridge, Tennessee. BSD focuses its research on biofuels-liquid and gaseous fuels made from renewable domestic crops-and aggressively pursues new methods for domestically producing, recovering, and converting the feedstocks to produce the fuels economically. The biomass resources include forage grasses, oil seeds, short-rotation woody crops, agricultural and forestry residues, algae, and certain industrial and municipal waste streams. The resulting fuels include ethanol, methanol, biodiesel, and ethers.

  17. Engineering microbial biofuel tolerance and export using efflux pumps

    E-Print Network [OSTI]

    Dunlop, Mary

    2012-01-01

    biofuel production. Two pumps consistently survived thethe native E. coli pump Molecular Systems Biology 2011 3biofuel tolerance using ef?ux pumps MJ Dunlop et al A A.

  18. Biofuels: Helping to Move the Industry to the Next Level

    Broader source: Energy.gov [DOE]

    In our committment to tripling biofuel production in the next 12 years, we've in the past two years announced 40 projects and over $850 million to projects focused on cellulosic biofuels and next generation hydrocarbon fuels.

  19. Video: A New Biofuels Technology Blooms in Iowa

    Broader source: Energy.gov [DOE]

    Cellulosic biofuels made from agricultural residue have caught the attention of many farmers and could be the next revolution in renewable biofuels production. This video shows how an innovative...

  20. Mesoporous Silica-Supported Metal Oxide-Promoted Rh Nanocatalyst for Selective Production of Ethanol from Syngas

    SciTech Connect (OSTI)

    George Kraus

    2010-09-30

    The objective is to develop a process that will convert synthesis gas from coal into ethanol and then transform the ethanol into hydrogen. Principal investigators from Iowa State University include Dr. George Kraus, Dr. Victor Lin, Marek Pruski, and Dr. Robert Brown. Task 1 involves catalyst development and catalyst scale up. Mesoporous manganese silicate mixed oxide materials will be synthesized, characterized and evaluated. The first-and secondgeneration catalysts have been prepared and scaled up for use in Task 2. The construction of a high-pressure reactor system for producing synthetic liquid fuel from simulated synthesis gas stream has been completed as the first step in Task 2. Using the first- and second generation catalysts, the reactor has demonstrated the production of synthetic liquid fuel from a simulated synthesis gas stream.

  1. Lifecycle Analyses of Biofuels

    E-Print Network [OSTI]

    Delucchi, Mark

    2006-01-01

    Balances for a Range of Biofuel Options, Project Number8. F UELCYCLE EMISSIONS FOR BIOFUEL VEHICLES IN DIFFERENTch. and LEM % ch. For a few biofuel lifecycles there can be

  2. Ethanol Demand in United States Regional Production of Oxygenate-limited Gasoline

    SciTech Connect (OSTI)

    Hadder, G.R.

    2000-08-01

    The Energy Policy Act of 1992 (the Act) outlined a national energy strategy that called for reducing the nation's dependency on petroleum imports. The Act directed the Secretary of Energy to establish a program to promote and expand the use of renewable fuels. The Office of Transportation Technologies (OTT) within the U.S. Department of Energy (DOE) has evaluated a wide range of potential fuels and has concluded that cellulosic ethanol is one of the most promising near-term prospects. Ethanol is widely recognized as a clean fuel that helps reduce emissions of toxic air pollutants. Furthermore, cellulosic ethanol produces less greenhouse gas emissions than gasoline or any of the other alternative transportation fuels being considered by DOE.

  3. Strategic Perspectives on Biofuels

    Office of Energy Efficiency and Renewable Energy (EERE)

    Plenary V: Biofuels and Sustainability: Acknowledging Challenges and Confronting MisconceptionsQuantitative Analysis of Biofuel Sustainability, Including Land Use Change GHG EmissionsLee R. Lynd,...

  4. Algal Biofuels Strategy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Algal Biofuels Strategy Report on Workshop Results and Recent Work Roxanne Dempsey Technology Manager 2 Algal Biofuels Strategy Session Agenda-Report on Workshop Results and Recent...

  5. Biotests for hazard assessment of biofuel fermentation Sebastian Heger,a

    E-Print Network [OSTI]

    Angenent, Lars T.

    ecotoxicological investigation of a biomass-to-biofuel production process with respect to the generation and biofuel production streams should be conducted very early in the biofuel life cycle in parallelBiotests for hazard assessment of biofuel fermentation Sebastian Heger,a Kerstin Bluhm,a Matthew T

  6. Nipa (Nypa fruticans) sap as a potential feedstock for ethanol production Pramila Tamunaidu1

    E-Print Network [OSTI]

    Takada, Shoji

    of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan Tel/Fax: +81(0)75 753 4738 Email address: saka@energy.kyoto-u.ac.jp 2 feedstocks for ethanol at present are sugarcane juice in Brazil, and corn starch in the US. However, growing

  7. Xylose utilizing zymomonas mobilis with improved ethanol production in biomass hydrolysate medium

    DOE Patents [OSTI]

    Caimi, Perry G; Hitz, William D; Stieglitz, Barry; Viitanen, Paul V

    2013-07-02

    Xylose-utilizing, ethanol producing strains of Zymomonas mobilis with improved performance in medium comprising biomass hydrolysate were isolated using an adaptation process. Independently isolated strains were found to have independent mutations in the same coding region. Mutation in this coding may be engineered to confer the improved phenotype.

  8. Xylose utilizing Zymomonas mobilis with improved ethanol production in biomass hydrolysate medium

    DOE Patents [OSTI]

    Caimi, Perry G; Hitz, William D; Viitanen, Paul V; Stieglitz, Barry

    2013-10-29

    Xylose-utilizing, ethanol producing strains of Zymomonas mobilis with improved performance in medium comprising biomass hydrolysate were isolated using an adaptation process. Independently isolated strains were found to have independent mutations in the same coding region. Mutation in this coding may be engineered to confer the improved phenotype.

  9. Assessing Habitat for Avian Species in Assessing Habitat for Avian Species in an Integrated Forage/Biofuels an Integrated Forage/Biofuels

    E-Print Network [OSTI]

    Gray, Matthew

    in an Integrated Forage/Biofuels an Integrated Forage/Biofuels Management System Management System in the Midin NWSG mixes beneficial to forage, biofuels production, and wildlife habitatp , 3. identify wildlife habitat benefits associated with varying forage and biofuels management strategies 4. identify optimum

  10. Evolved strains of Scheffersomyces stipitis achieving high ethanol productivity on acid- and base-pretreated biomass hydrolyzate at high solids loading

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Slininger, Patricia J; Shea-Andersh, Maureen A; Thompson, Stephanie R; Dien, Bruce S; Kurtzman, Cletus P; Balan, Venkatesh; da Costa Sousa, Leonardo; Uppugundla, Nirmal; Dale, Bruce E; Cotta, Michael A

    2015-12-01

    Lignocellulosic biomass is an abundant, renewable feedstock useful for the production of fuel-grade ethanol via the processing steps of pretreatment, enzyme hydrolysis, and microbial fermentation. Traditional industrial yeasts do not ferment xylose and are not able to grow, survive, or ferment in concentrated hydrolyzates that contain enough sugar to support economical ethanol recovery since they are laden with toxic byproducts generated during pretreatment.

  11. Research Summary: Corrosion Considerations for Thermochemical Biomass Liquefaction Process Systems in Biofuel Production

    SciTech Connect (OSTI)

    Brady, Michael P; Keiser, James R; Leonard, Donovan N; Whitmer, Lysle; Thomson, Jeffery K

    2014-01-01

    Thermochemical liquifaction processing of biomass to produce bio-derived fuels (e.g. gasoline, jet fuel, diesel, home heating oil, etc.) is of great recent interest as a renewable energy source. Approaches under investigation include direct liquefaction, hydrothermal liquefaction, hydropyrolysis, fast pyrolysis, etc. to produce energy dense liquids that can be utilized as produced or further processed to provide products of higher value. An issue with bio-oils is that they tend to contain significant concentrations of organic compounds, which make the bio-oil acidic and a potential source of corrosion issues in in transport, storage, and use. Efforts devoted to modified/further processing of bio-oils to make them less corrosive are currently being widely pursued. Another aspect that must also be addressed is potential corrosion issues in the bio-oil liquefaction process equipment itself. Depending on the specific process, bio-oil liquefaction production temperatures can reach up to 400-600 C, and involve the presence of aggressive sulfur, and halide species from both the biomass used and/or process additives. Detailed knowledge of the corrosion resistance of candidate process equipment alloys in these bio-oil production environments is currently lacking. This paper summarizes our recent, ongoing efforts to assess the extent to which corrosion of bio-oil process equipment may be an issue, with the ultimate goal of providing the basis to select the lowest cost alloy grades capable of providing the long-term corrosion resistance needed for future bio-oil production plants.

  12. Vertical Integration of Biomass Saccharification of Enzymes for Sustainable Cellulosic Biofuel Production in a Biorefinery

    SciTech Connect (OSTI)

    Manoj Kumar, PhD

    2011-05-09

    Lignocellulosic biomass is the most abundant, least expensive renewable natural biological resource for the production of biobased products and bioenergy is important for the sustainable development of human civilization in 21st century. For making the fermentable sugars from lignocellulosic biomass, a reduction in cellulase production cost, an improvement in cellulase performance, and an increase in sugar yields are all vital to reduce the processing costs of biorefineries. Improvements in specific cellulase activities for non-complexed cellulase mixtures can be implemented through cellulase engineering based on rational design or directed evolution for each cellulase component enzyme, as well as on the reconstitution of cellulase components. In this paper, we will provide DSM's efforts in cellulase research and developments and focus on limitations. Cellulase improvement strategies based on directed evolution using screening on relevant substrates, screening for higher thermal tolerance based on activity screening approaches such as continuous culture using insoluble cellulosic substrates as a powerful selection tool for enriching beneficial cellulase mutants from the large library. We will illustrate why and how thermostable cellulases are vital for economic delivery of bioproducts from cellulosic biomass using biochemical conversion approach.

  13. Media Framing and Public Attitudes Toward Biofuels Ashlie Delshad

    E-Print Network [OSTI]

    Media Framing and Public Attitudes Toward Biofuels Ashlie Delshad Department of Political Science between media framing and public opinion on the issue of biofuels--transportation fuels made from plants, animal products, or organic waste. First, the paper investigates how media framing of biofuels has

  14. FULLY FUNDED DEPARTMENT OF ENERGY BIOFUELS RESEARCH INTERNSHIP

    E-Print Network [OSTI]

    Wildermuth, Mary C

    FULLY FUNDED DEPARTMENT OF ENERGY BIOFUELS RESEARCH INTERNSHIP AT PACIFIC NORTHWEST NATIONAL LABORATORY Position Description The overall project objective is to utilize marine microalgae for biofuels (i.e., lipids for biodiesel or jet biofuel) production. The student will set up a series

  15. Nottingham Business School Biofuels Market and Policy Governance

    E-Print Network [OSTI]

    Evans, Paul

    Nottingham Business School Biofuels Market and Policy Governance The last decade has seen a dramatic growth in the global production and consumption of biofuels, as a rapidly- rising number triggered growing concerns about the downsides from different types of biofuel. This, in turn, presents

  16. Global Assessments and Guidelines for Sustainable Liquid Biofuel

    E-Print Network [OSTI]

    -GHG environmental impacts of OKEO Chapter 6 Social impacts of liquid biofuel production OEKO Chapter 7 Next), Morelia/Mexico Appendix H Background data for global non-GHG envi- ronmental impacts of biofuels OEKO G Water footprints of biofuel cropping systems in Mexico Red Mexicana de Bioenergía (REMBIO

  17. Microfluidic Glycosyl Hydrolase Screening for Biomass-to-Biofuel Conversion

    E-Print Network [OSTI]

    Singh, Anup

    Microfluidic Glycosyl Hydrolase Screening for Biomass-to-Biofuel Conversion Rajiv Bharadwaj such as cellulases and hemicellulases is a limiting and costly step in the conversion of biomass to biofuels. Lignocellulosic (LC) biomass is an abundant and potentially carbon-neutral resource for production of biofuels

  18. Vermont Biofuels Initiative: Local Production for Local Use to Supply a Portion of Vermont�s Energy Needs

    SciTech Connect (OSTI)

    Scott Sawyer; Ellen Kahler

    2009-05-31

    The Vermont Biofuels initiative (VBI) is the Vermont Sustainable Jobs Fund�s (VSJF) biomass-to-biofuels market development program. Vermont is a small state with a large petroleum dependency for transportation (18th in per capita petroleum consumption) and home heating (55% of all households use petroleum for heating). The VBI marks the first strategic effort to reduce Vermont�s dependency on petroleum through the development of homegrown alternatives. As such, it supports the four key priorities of the U.S. Department of Energy�s Multi-year Biomass Plan: 1.) Dramatically reduce dependence on foreign oil; 2.) Promote the use of diverse, domestic and sustainable energy resources; 3.) Reduce carbon emissions from energy production and consumption; 4.) Establish a domestic bioindustry. In 2005 VSJF was awarded with a $496,000 Congressionally directed award from U.S. Senator Patrick Leahy. This award was administered through the U.S. Department of Energy (DE-FG36- 05GO85017, hereafter referred to as DOE FY05) with $396,000 to be used by VSJF for biodiesel development and $100,000 to be used by the Vermont Department of Public Service for methane biodigester projects. The intent and strategic focus of the VBI is similar to another DOE funded organization� the Biofuels Center of North Carolina�in that it is a nonprofit driven, statewide biofuels market development effort. DOE FY05 funds were expensed from 2006 through 2008 for seven projects: 1) a feedstock production, logistics, and biomass conversion research project conducted by the University of Vermont Extension; 2) technical assistance in the form of a safety review and engineering study of State Line Biofuels existing biodiesel production facility; 3) technical assistance in the form of a safety review and engineering study of Borderview Farm�s proposed biodiesel production facility; 4) technology and infrastructure purchases for capacity expansion at Green Technologies, LLC, a waste vegetable biodiesel producer; 5) technical assistance in the form of feasibility studies for AgNorth Biopower LLC�s proposed multi-feedstock biodigester; 6) technology and infrastructure purchases for the construction of a �Cow Power� biodigester at Gervais Family Farm; and 7) the education and outreach activities of the Vermont Biofuels Association. DOE FY05 funded research, technical assistance, and education and outreach activities have helped to provide Vermont farmers and entrepreneurs with important feedstock production, feedstock logistics, and biomass conversion information that did not exist prior as we work to develop an instate biodiesel sector. The efficacy of producing oilseed crops in New England is now established: Oilseed crops can grow well in Vermont, and good yields are achievable given improved harvesting equipment and techniques. DOE FY05 funds used for technology and infrastructure development have expanded Vermont�s pool of renewable electricity and liquid fuel generation. It is now clear that on-farm energy production provides an opportunity for Vermont farmers and entrepreneurs to reduce on-farm expenditures of feed and fuel while providing for their energy security. Meanwhile they are developing new value-added revenue sources (e.g., locally produced livestock meal), retaining more dollars in the local economy, and reducing greenhouse gas emissions.

  19. AN OVERVIEW OF BIOFUELS PROCESS DEVELOPMENT IN SOUTH CAROLINA

    SciTech Connect (OSTI)

    Sherman, S.; French, T.

    2010-02-03

    The South Carolina Bio-Energy Research Collaborative is working together on the development and demonstration of technology options for the production of bio-fuels using renewable non-food crops and biomass resources that are available or could be made available in abundance in the southeastern United States. This collaboration consists of Arborgen LLC, Clemson University, Savannah River National Laboratory, and South Carolina State University, with support from Dyadic, Fagen Engineering, Renewed World Energies, and Spinx. Thus far, most work has centered on development of a fermentation-based process to convert switchgrass into ethanol, with the concomitant generation of a purified lignin stream. The process is not feed-specific, and the work scope has recently expanded to include sweet sorghum and wood. In parallel, the Collaborative is also working on developing an economical path to produce oils and fuels from algae. The Collaborative envisions an integrated bio-fuels process that can accept multiple feedstocks, shares common equipment, and that produces multiple product streams. The Collaborative is not the only group working on bio-energy in South Carolina, and other companies are involved in producing biomass derived energy products at an industrial scale.

  20. Cooking Up More Uses for the Leftovers of Biofuel Production -N... http://www.nytimes.com/2007/08/08/business/08biodiesel.html?ei=... 1 of 3 8/8/07 10:49 AM

    E-Print Network [OSTI]

    Kimbrough, Steven Orla

    production in the United States has risen, the market for glycerol has become saturated. If scientists like ethanol and lignin from cellulosic ethanol. Other researchers are trying to develop technologiesVision Technology is making lignin. A natural compound that helps provide strength and rigidity in plants, lignin

  1. A process economic assessment of hydrocarbon biofuels production using chemoautotrophic organisms

    SciTech Connect (OSTI)

    Khan, NE; Myers, JA; Tuerk, AL; Curtis, WR

    2014-11-01

    Economic analysis of an ARPA-e Electrofuels (http://arpa-e.energy.gov/?q=arpa-e-programs/electrofuels) process is presented, utilizing metabolically engineered Rhodobacter capsulatus or Ralstonia eutropha to produce the C30+ hydrocarbon fuel, botryococcene, from hydrogen, carbon dioxide, and oxygen. The analysis is based on an Aspen plus (R) bioreactor model taking into account experimentally determined Rba. capsulatus and Rls. eutropha growth and maintenance requirements, reactor residence time, correlations for gas-liquid mass-transfer coefficient, gas composition, and specific cellular fuel productivity. Based on reactor simulation results encompassing technically relevant parameter ranges, the capital and operating costs of the process were estimated for 5000 bbl-fuel/day plant and used to predict fuel cost. Under the assumptions used in this analysis and crude oil prices, the Levelized Cost of Electricity (LCOE) required for economic feasibility must be less than 2(sic)/kWh. While not feasible under current market prices and costs, this work identifies key variables impacting process cost and discusses potential alternative paths toward economic feasibility. (C) 2014 Elsevier Ltd. All rights reserved.

  2. Global Economic Effects of USA Biofuel Policy and the Potential Contribution from Advanced Biofuels

    SciTech Connect (OSTI)

    Gbadebo Oladosu; Keith Kline; Paul Leiby; Rocio Uria-Martinez; Maggie Davis; Mark Downing; Laurence Eaton

    2012-01-01

    This study evaluates the global economic effects of the USA renewable fuel standards (RFS2), and the potential contribution from advanced biofuels. Our simulation results imply that these mandates lead to an increase of 0.21 percent in the global gross domestic product (GDP) in 2022, including an increase of 0.8 percent in the USA and 0.02 percent in the rest of the world (ROW); relative to our baseline, no-RFS scenario. The incremental contributions to GDP from advanced biofuels in 2022 are estimated at 0.41 percent and 0.04 percent in the USA and ROW, respectively. Although production costs of advanced biofuels are higher than for conventional biofuels in our model, their economic benefits result from reductions in oil use, and their smaller impacts on food markets compared with conventional biofuels. Thus, the USA advanced biofuels targets are expected to have positive economic benefits.

  3. The threat of running out of fossil fuels has increased demand for alternative fuel sources. Grain-based ethanol production is one such

    E-Print Network [OSTI]

    Rock, Chris

    The threat of running out of fossil fuels has increased demand for alternative fuel sources. Grain-based ethanol production is one such alternative fuel option, but it relies heavily on grains previously availability. With the growing legislative endorsement for alternative fuel sources, grain production

  4. Screening study for waste biomass to ethanol production facility using the Amoco process in New York State. Final report

    SciTech Connect (OSTI)

    NONE

    1995-08-01

    This report evaluates the economic feasibility of locating biomass-to-ethanol waste conversion facilities in New York State. Part 1 of the study evaluates 74 potential sites in New York City and identifies two preferred sites on Staten, the Proctor Gamble and the Arthur Kill sites, for further consideration. Part 2 evaluates upstate New York and determines that four regions surrounding the urban centers of Albany, Buffalo, Rochester, and Syracuse provide suitable areas from which to select specific sites for further consideration. A separate Appendix provides supplemental material supporting the evaluations. A conceptual design and economic viability evaluation were developed for a minimum-size facility capable of processing 500 tons per day (tpd) of biomass consisting of wood or paper, or a combination of the two for upstate regions. The facility would use Amoco`s biomass conversion technology and produce 49,000 gallons per day of ethanol and approximately 300 tpd of lignin solid by-product. For New York City, a 1,000-tpd processing facility was also evaluated to examine effects of economies of scale. The reports evaluate the feasibility of building a biomass conversion facility in terms of city and state economic, environmental, and community factors. Given the data obtained to date, including changing costs for feedstock and ethanol, the project is marginally attractive. A facility should be as large as possible and located in a New York State Economic Development Zone to take advantage of economic incentives. The facility should have on-site oxidation capabilities, which will make it more financially viable given the high cost of energy. 26 figs., 121 tabs.

  5. Ethanol Production from Rice-Straw Hydrolysate Using Zymomonas Mobilis in a Continuous Fluidized-Bed Reactor (FBR)

    SciTech Connect (OSTI)

    deJesus, D.; Nghiem, N.P.

    2001-01-01

    Rice-straw hydrolysate obtained by the Arkenol's concentrated acid hydrolysis process was fermented to ethanol using a recombinant Zymomonas mobilis strain capable of utilizing both glucose and xylose in a continuous fluidized-bed reactor (FBR). The parameters studied included biocatalyst stability with and without antibiotic, feed composition, and retention time. Xylose utilization in the presence of tetracycline remained stable for at least 17 days. This was a significant improvement over the old strain, Z. mobilis CP4 (pZB5), which started to lose xylose utilization capability after seven days. In the absence of tetracycline, the xylose utilization rate started to decrease almost immediately. With tetracycline in the feed for the first six days, stability of xylose utilization was maintained for four days after the antibiotic was removed from the feed. The xylose utilization rate started to decrease on day 11. In the presence of tetracycline using the Arkenol's hydrolysate diluted to 48 g/L glucose and 13 g/L xylose at a retention time of 4.5 h, 95% xylose conversion and complete glucose conversion occurred. The ethanol concentration was 29 g/L, which gave a yield of 0.48 g/g sugar consumed or 94% of the theoretical yield. Using the Arkenol's hydrolysate diluted to 83 g/L glucose and 28 g/L xylose, 92% xylose conversion and complete glucose conversion were obtained. The ethanol concentration was 48 g/L, which gave a yield of 0.45 g/ g sugar consumed or 88% of the theoretical yield. Maximum productivity of 25.5 g/L-h was obtained at a retention time of 1.9 h. In this case, 84% xylose conversion was obtained.

  6. Soil and variety effects on energy use and carbon emissions associated with switchgrass-based ethanol production in Mississippi

    SciTech Connect (OSTI)

    Woli, Prem; Paz, Joel O.; Baldwin, Brian S.; Lang, David J.; Kiniry, James R.

    2012-06-29

    High biomass production potential, wide adaptability, low input requirement, and low environmental risk make switchgrass an economically and ecologically viable energy crop.The inherent variablity in switchgrass productivity due to variations in soil and variety could affect the sustainability and eco-friendliness of switchgrass-based ethanol production. This study examined the soil and variety effects on these variables. Three locations in Mississippi were selected based on latitude and potential acreage. Using ALMANAC, switchgrass biomass yields were simulated for several scenarios of soils and varities. The simulated yields were fed to IBSAL to compute energy use and CO2 emissions in various operations in the biomass supply From the energy and emissions values, the sustainability and eco-friendliness of ethanol production were determined using net energy value (NEV) and carbon credit balance (CCB) as indicators, respectively. Soil and variety effects on NEV and CCB were analyzed using the Kruskal-Wallis test. Results showed significant differences in NEV and CCB across soils and varieties. Both NEV and CCB increased in the direction of heavier to lighter soils and on the order of north-upland , south-upland, north-lowland, and south-lowland varieties. Only north-upland and south-lowland varieties were significantly significantly different because they were different in both cytotype and ecotype. Gaps between lowland and upland varieties were smaller in a dry year than in a wet year. The NEV and CCB increased in the direction of dry to wet year. From south to north, they decreased for lowland cytotypes but increased for upland cytotypes. Thus, the differences among varieties decreased northwards.

  7. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2011-01-01

    Process Development and Design Studies· . · 9 1. Continuous Cellulase ProductionPROCESS DEVELOPMENT AND DESIGN STUDIES Continuous Cellulase Production

  8. CONNECTICUT BIOFUELS TECHNOLOGY PROJECT

    SciTech Connect (OSTI)

    BARTONE, ERIK

    2010-09-28

    DBS Energy Inc. (“DBS”) intends on using the Connecticut Biofuels Technology Project for the purpose of developing a small-scale electric generating systems that are located on a distributed basis and utilize biodiesel as its principle fuel source. This project will include research and analysis on the quality and applied use of biodiesel for use in electricity production, 2) develop dispatch center for testing and analysis of the reliability of dispatching remote generators operating on a blend of biodiesel and traditional fossil fuels, and 3) analysis and engineering research on fuel storage options for biodiesel of fuels for electric generation.

  9. Biofuels: Microbially Generated Methane and

    E-Print Network [OSTI]

    Wood, Thomas K.

    ) and methane (CH4) from renewable biomass has the potential to con- tribute to reducing dependence on fossilBiofuels: Microbially Generated Methane and Hydrogen Michael J McAnulty, Pennsylvania State, USA James G Ferry, Pennsylvania State University, University Park, Pennsylvania, USA The production

  10. D o s s i e r Second and Third Generation Biofuels: Towards Sustainability and Competitiveness

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    D o s s i e r Second and Third Generation Biofuels: Towards Sustainability and Competitiveness available for the production of bio-product or biofuels. In comparison with wood lignins which contain

  11. GREET Life-Cycle Analysis of Biofuels

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    J Han, MQ Wang. "Life-cycle energy use and greenhouse gas emissions of production of bioethanol from sorghum in the United States." 2013. Biotechnology for Biofuels, 6:141. * Z...

  12. Biofuels in Minnesota: A Success Story

    Broader source: Energy.gov [DOE]

    This PDF provides a Minnesota biofuels success story. It shows the timeline of state actions, the number of biodiesel plants in the state, production and consumption rates, and the NextGen Energy Initiative.

  13. Future of Liquid Biofuels for APEC Economies

    SciTech Connect (OSTI)

    Milbrandt, A.; Overend, R. P.

    2008-05-01

    This project was initiated by APEC Energy Working Group (EWG) to maximize the energy sector's contribution to the region's economic and social well-being through activities in five areas of strategic importance including liquid biofuels production and development.

  14. Conversion Technologies for Advanced Biofuels - Bio-Oil Upgrading...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ebinarbiooilsupgrading.pdf More Documents & Publications Conversion Technologies for Advanced Biofuels - Bio-Oil Production Thermochemical Conversion Proceeses to Aviation Fuels...

  15. Obama Administration Announces New Investments to Advance Biofuels...

    Energy Savers [EERE]

    energy efficiency, and speeding development of biofuels and other alternatives. Domestic oil and gas production has increased each year the President has been in office. At the...

  16. Food Security and Nutrition NONE 09 BIOMASS FUELS; BIOFUELS;...

    Office of Scientific and Technical Information (OSTI)

    Level Panel of Experts on Food Security and Nutrition NONE 09 BIOMASS FUELS; BIOFUELS; PRODUCTION; AGRICULTURE; ENERGY POLICY; SOCIO-ECONOMIC FACTORS; SUSTAINABLE DEVELOPMENT;...

  17. Importance of systems biology in engineering microbes for biofuel...

    Office of Scientific and Technical Information (OSTI)

    Importance of systems biology in engineering microbes for biofuel production Citation Details In-Document Search Title: Importance of systems biology in engineering microbes for...

  18. Obama Announces Steps to Boost Biofuels, Clean Coal | Department...

    Broader source: Energy.gov (indexed) [DOE]

    the country, the President laid out three measures that will work in concert to boost biofuels production and reduce our dangerous dependence on foreign oil. The Environmental...

  19. Workshop on Conversion Technologies for Advanced Biofuels - Bio...

    Energy Savers [EERE]

    Bio-Oil Production Conversion Technologies for Advanced Biofuels - Bio-Oil Upgrading Challenge 2 Logistics and Compatibility with Existing Infrastructure Throughout Supply Chain...

  20. Market Drivers for Biofuels | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Market Drivers for Biofuels Market Drivers for Biofuels This presentation, entitled "Market Drivers for Biofuels," was given at the Third Annual MSW to Biofuels Summit in February,...

  1. of Biofuels Sustainable Feedstocks

    E-Print Network [OSTI]

    The Next Generation of Biofuels Sustainable Feedstocks Cost-Competitive Options #12;Photos courtesy the evolutionary code for an entirely new generation of biofuels capable of transforming the American automobile biofuels at a cost competitive with that of gasoline. Equally important, they are using crops

  2. The grass is half-full : new biofuels from field to wheel

    E-Print Network [OSTI]

    Moseman, Andrew (Andrew Garet)

    2008-01-01

    The current biofuels market in the United States is dominated by ethanol made from corn. But corn ethanol has limitations that will prevent it from displacing a large amount of fossil fuel use in the U.S. To achieve that ...

  3. Biofuels, biodiversity, and people: Understanding the conflicts and finding opportunities

    E-Print Network [OSTI]

    Ethanol Energy crisis Oil price Food crisis Water crisis A B S T R A C T The finitude of fossil fuels, concerns for energy security and the need to respond to climate change have led to growing worldwide and biodiversity, food price increases, and competition for water resources as the key negative impacts of biofuel

  4. Combined inactivation of the Clostridium cellulolyticum lactate and malate dehydrogenase genes substantially increases ethanol yield from cellulose and switchgrass fermentations

    SciTech Connect (OSTI)

    Li, Yongchao; Tschaplinski, Timothy J; Engle, Nancy L; Hamilton, Choo Yieng; Rodriguez, Jr., Miguel; Liao, James C; Schadt, Christopher Warren; Guss, Adam M; Yang, Yunfeng; Graham, David E

    2012-01-01

    Background: The model bacterium Clostridium cellulolyticum efficiently hydrolyzes crystalline cellulose and hemicellulose, using cellulosomes to degrade lignocellulosic biomass. Although it imports and ferments both pentose and hexose sugars to produce a mixture of ethanol, acetate, lactate, H2 and CO2, the proportion of ethanol is low, which impedes its use in consolidated bioprocessing for biofuels. Therefore genetic engineering will likely be required to improve the ethanol yield. Random mutagenesis, plasmid transformation, and heterologous expression systems have previously been developed for C. cellulolyticum, but targeted mutagenesis has not been reported for this organism. Results: The first targeted gene inactivation system was developed for C. cellulolyticum, based on a mobile group II intron originating from the Lactococcus lactis L1.LtrB intron. This markerless mutagenesis system was used to disrupt both the paralogous L-lactate dehydrogenase (Ccel_2485; ldh) and L-malate dehydrogenase (Ccel_0137; mdh) genes, distinguishing the overlapping substrate specificities of these enzymes. Both mutations were then combined in a single strain. This double mutant produced 8.5-times more ethanol than wild-type cells growing on crystalline cellulose. Ethanol constituted 93% of the major fermentation products (by molarity), corresponding to a molar ratio of ethanol to organic acids of 15, versus 0.18 in wild-type cells. During growth on acid-pretreated switchgrass, the double mutant also produced four-times as much ethanol as wild-type cells. Detailed metabolomic analyses identified increased flux through the oxidative branch of the mutant s TCA pathway. Conclusions: The efficient intron-based gene inactivation system produced the first gene-targeted mutations in C. cellulolyticum. As a key component of the genetic toolbox for this bacterium, markerless targeted mutagenesis enables functional genomic research in C. cellulolyticum and rapid genetic engineering to significantly alter the mixture of fermentation products. The initial application of this system successfully engineered a strain with high ethanol productivity from complex biomass substrates.

  5. Evanescent Photosynthesis: A new approach to sustainable biofuel Matthew D. Ooms

    E-Print Network [OSTI]

    Pedersen, Tom

    Evanescent Photosynthesis: A new approach to sustainable biofuel production by Matthew D. Ooms #12;Abstract Evanescent Photosynthesis: A new approach to sustainable biofuel production Matthew D biofuel and other high value compounds through direct conversion of CO2 and water using energy from

  6. Algal Biofuels Factsheet: Long-Term Energy Benefits Drive U.S. Research

    SciTech Connect (OSTI)

    2013-03-04

    Algal biofuels are generating considerable interest around the world. In the United States, they represent promising pathways for helping to meet the biofuel production targets set by the Energy Independence and Security Act of 2007.

  7. Georgia Biofuel Directory A directory of Georgia industries that use biofuels.

    E-Print Network [OSTI]

    Georgia Biofuel Directory · A directory of Georgia industries that use biofuels. · Completed in May _________________________________________________________________ 3 Biofuels_____________________________________________________________________ 4 Biofuel Use in Georgia that Burn Self-Generated Biofuels as of May 2003__ 4 Chart 1.0 Biofuel Use from Contacted

  8. Insect Science (2010) 17, 117, DOI 10.1111/j.1744-7917.2009.01310.x Arthropods and biofuel production systems in North America

    E-Print Network [OSTI]

    Landis, Doug

    2010-01-01

    of biofuel crops will likely become more important and new pests will emerge. Beneficial arthropods will also on arthropod dynamics within biofuel crops, their spillover into adjacent habitats, and implications man- agement systems will clearly be needed to mitigate the negative impacts of arthropods as plant

  9. Socio-economic dynamics of biofuel

    E-Print Network [OSTI]

    production from coconut oil. - Bioethanol is mainly produced from cassava and sugarcane. Thailand for agricultural staples such as palm oil for the production of biofuel also threatens to crowd out their use promoted as a solution for energy self- sufficiency and reducing greenhouse gas emissions, the production

  10. The effect of CO regulations on the cost of corn ethanol production

    E-Print Network [OSTI]

    Kammen, Daniel M.

    in British Columbia and the European Union. While the term `carbon intensity' is popular, it does not include Contact us My IOPscience #12;IOP PUBLISHING ENVIRONMENTAL RESEARCH LETTERS Environ. Res. Lett. 3 (2008, and (3) a low carbon fuel standard (LCFS). A CO2 charge on life cycle emissions increases production

  11. Ethanol production by Escherichia coli strains co-expressing Zymomonas PDC and ADH genes

    DOE Patents [OSTI]

    Ingram, Lonnie O. (Gainesville, FL); Conway, Tyrrell (Lincoln, NE); Alterthum, Flavio (Gainesville, FL)

    1991-01-01

    A novel operon and plasmids comprising genes which code for the alcohol dehydrogenase and pyruvate decarboxylase activities of Zymomonas mobilis are described. Also disclosed are methods for increasing the growth of microorganisms or eukaryotic cells and methods for reducing the accumulation of undesirable metabolic products in the growth medium of microorganisms or cells.

  12. Biofuels Market Opportunities

    Broader source: Energy.gov [DOE]

    Breakout Session 2C—Fostering Technology Adoption II: Expanding the Pathway to Market Biofuels Market Opportunities John Eichberger, Vice President Government Relations, National Association of Convenience Stores

  13. Alternative Transportation Technologies: Hydrogen, Biofuels,...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Hydrogen, Biofuels, Advanced Efficiency, and Plug-in Hybrid Electric Vehicles Alternative Transportation Technologies: Hydrogen, Biofuels, Advanced Efficiency, and Plug-in...

  14. SciTech Connect: "biofuels"

    Office of Scientific and Technical Information (OSTI)

    biofuels" Find + Advanced Search Term Search Semantic Search Advanced Search All Fields: "biofuels" Semantic Semantic Term Title: Full Text: Bibliographic Data: Creator ...

  15. A National-Scale Comparison of Resource and Nutrient Demands for Algae-Based Biofuel Production by Lipid Extraction and Hydrothermal Liquefaction

    SciTech Connect (OSTI)

    Venteris, Erik R.; Skaggs, Richard; Wigmosta, Mark S.; Coleman, Andre M.

    2014-03-01

    Algae’s high productivity provides potential resource advantages over other fuel crops. However, demand for land, water, and nutrients must be minimized to avoid impacts on food production. We apply our national-scale, open-pond, growth and resource models to assess several biomass to fuel technological pathways based on Chlorella. We compare resource demands between hydrothermal liquefaction (HTL) and lipid extraction (LE) to meet 1.89E+10 and 7.95E+10 L yr-1 biofuel targets. We estimate nutrient demands where post-fuel biomass is consumed as co-products and recycling by anaerobic digestion (AD) or catalytic hydrothermal gasification (CHG). Sites are selected through prioritization based on fuel value relative to a set of site-specific resource costs. The highest priority sites are located along the Gulf of Mexico coast, but potential sites exist nationwide. We find that HTL reduces land and freshwater consumption by up to 46% and saline groundwater by around 70%. Without recycling, nitrogen (N) and phosphorous (P) demand is reduced 33%, but is large relative to current U.S. agricultural consumption. The most nutrient-efficient pathways are LE+CHG for N and HTL+CHG for P (by 42%). Resource gains for HTL+CHG are offset by a 344% increase in N consumption relative to LE+CHG (with potential for further recycling). Nutrient recycling is essential to effective use of alternative nutrient sources. Modeling of utilization availability and costs remains, but we find that for HTL+CHG at the 7.95E+10 L yr-1 production target, municipal sources can offset 17% of N and 40% of P demand and animal manures can generally meet demands.

  16. THE POTENTIAL OF FRESHWATER MACROALGAE AS A BIOFUELS FEEDSTOCK AND THE INFLUENCE OF NUTRIENT AVAILABILITY ON FRESHWATER MACROALGAL BIOMASS PRODUCTION

    E-Print Network [OSTI]

    Yun, Jin-Ho

    2014-12-31

    difference in productivity between the treatments, the average dry weight productivity of Oedogonium (3.37 g/m2/day) was found to be much higher than is achievable with common terrestrial plant crops. Although filamentous freshwater macroalgae, therefore...

  17. RESOURCES BIOMASS & BIOFUELS MRS BULLETIN VOLUME 33 APRIL 2008 www.mrs.org/bulletin Harnessing Materials for Energy

    E-Print Network [OSTI]

    California at Riverside, University of

    381 RESOURCES · BIOMASS & BIOFUELS MRS BULLETIN · VOLUME 33 · APRIL 2008 · www.mrs.org/bulletin · Harnessing Materials for Energy What Is Cellulosic Biomass? Although ethanol is now made from the sugars for ethanol in terms of fuel use could be realized if the sugars from more recalcitrant cellulosic biomass

  18. Biofuel Supply Chain Infrastructure Optimizing the Evolution of Cellulosic Biofuel

    E-Print Network [OSTI]

    Biofuel Supply Chain Infrastructure Optimizing the Evolution of Cellulosic Biofuel Center infrastructure. Cellulosic-based ad- vanced biofuel has a target of 21 billion gallons by 2022 and requires into a national economic model of biofuel sustainability. Cellulosic biomass relocates the demand

  19. Life Cycle Analysis of the Production of Aviation Fuels Using the CE-CERT Process

    E-Print Network [OSTI]

    Hu, Sangran

    2012-01-01

    that we should use alternative aviation fuels instead ofbe used as an aviation alternative fuel. Bio-ethanol does1.1.3 Aviation biofuels Biofuels are alternative fuels

  20. IOL: Africa's big plans for biofuel Africa's big plans for biofuel

    E-Print Network [OSTI]

    IOL: Africa's big plans for biofuel Africa's big plans for biofuel By Clare Byrne Visitors for the production of fuel crops. http://www.iol.co.za/general/news/newsprint.php?art_id=nw20071106135542969C112694&sf= (1 of 3) [11/11/2008 11:48:04 AM] http://www.iol.co.za/index.php?set_id=1&click_id=31&art

  1. HARNESSING PLANT BIOMASS FOR BIOFUELS AND BIOMATERIALS Plant surface lipid biosynthetic pathways and their utility for

    E-Print Network [OSTI]

    Kunst, Ljerka

    HARNESSING PLANT BIOMASS FOR BIOFUELS AND BIOMATERIALS Plant surface lipid biosynthetic pathways and their utility for metabolic engineering of waxes and hydrocarbon biofuels Reinhard Jetter1,2,* and Ljerka Kunst1 biosynthetic pathways can be used in metabolic engineering of plants for the production of hydrocarbon biofuels

  2. Impacts of Land-Use and Biofuels Policy on Climate: Temperature and Localized Impacts

    E-Print Network [OSTI]

    Impacts of Land-Use and Biofuels Policy on Climate: Temperature and Localized Impacts Willow on recycled paper #12;1 Impacts of Land-Use and Biofuels Policy on Climate: Temperature and Localized Impacts to agricultural production, including growing biofuels, and (ii) Observed Land Supply Response (OLSR

  3. D o s s i e r Second and Third Generation Biofuels: Towards Sustainability and Competitiveness

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    D o s s i e r Second and Third Generation Biofuels: Towards Sustainability and Competitiveness biofuels will have an important part to take in the energy transition as far as fuels are concerned. Using biofuels, the BTL route consists in the production of middle dis- tillates (Diesel and jet fuel) via

  4. Energy Policy 36 (2008) 15381544 Promoting biofuels: Implications for developing countries

    E-Print Network [OSTI]

    2008-01-01

    Energy Policy 36 (2008) 1538­1544 Promoting biofuels: Implications for developing countries Jo¨ rg 2008 Abstract Interest in biofuels is growing worldwide as concerns about the security of energy supply, however, production costs of biofuels are typically much higher than those of fossil fuels. As a result

  5. MSU biofuels research fills need for new sources July 28, 2006 --By Carol Flaherty

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    MSU biofuels research fills need for new sources July 28, 2006 -- By Carol Flaherty The words are becoming familiar, even if the products aren't: biofuel, biobased, biodiesel, bioethanol. All refer to fuel collaborators are investigating Montana's potential for producing biofuels using "biomass," which refers to all

  6. 16 CSA News March 2013 thanol from corn has been the primary biofuel for liq-

    E-Print Network [OSTI]

    DeLucia, Evan H.

    16 CSA News March 2013 E thanol from corn has been the primary biofuel for liq- uid fuels in the United States, but perennial cellulosic biofuels are on the horizon. Intensive corn production with large of nitrogen losses on large, tile-drained fields planted with perennial biofuels in the Midwest of the United

  7. Implications of Three Biofuel Crops for Beneficial Arthropods in Agricultural Landscapes

    E-Print Network [OSTI]

    Landis, Doug

    Implications of Three Biofuel Crops for Beneficial Arthropods in Agricultural Landscapes Mary A Science+Business Media, LLC. 2010 Abstract Production of biofuel feedstocks in agricultural landscapes and generalist natural enemies in three model biofuel crops: corn, switch- grass, and mixed prairie, we tested

  8. Market penetration of biodiesel and ethanol 

    E-Print Network [OSTI]

    Szulczyk, Kenneth Ray

    2007-09-17

    that for the ranges studied, gasoline prices have a major impact on aggregate ethanol production but only at low prices. At higher prices, one runs into a capacity constraint that limits expansion on the capacity of ethanol production. Aggregate biodiesel production...

  9. Using System Dynamics to Model the Transition to Biofuels in the United States: Preprint

    SciTech Connect (OSTI)

    Bush, B.; Duffy, M.; Sandor, D.; Peterson, S.

    2008-06-01

    Transitioning to a biofuels industry that is expected to displace about 30% of current U.S. gasoline consumption requires a robust biomass-to-biofuels system-of-systems that operates in concert with the existing markets. This paper discusses employing a system dynamics approach to investigate potential market penetration scenarios for cellulosic ethanol and to help government decision makers focus on areas with greatest potential.

  10. Clean Cities: Ethanol Basics, Fact Sheet, October 2008

    SciTech Connect (OSTI)

    Not Available

    2008-10-01

    Document answers frequently asked questions about ethanol as a transportation fuel, including those on production, environmental effects, and vehicles.

  11. Bioproducts and Biofuels - Growing Together! | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Bioproducts and Biofuels - Growing Together Bioproducts and Biofuels - Growing Together Breakout Session 2B-Integration of Supply Chains II: Bioproducts-Enabling Biofuels and...

  12. Advanced Cellulosic Biofuels | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Cellulosic Biofuels Advanced Cellulosic Biofuels Breakout Session 2-B: NewEmerging Pathways Advanced Cellulosic Biofuels Dr. Robert Graham, Chief Executive Officer and Chairman,...

  13. Fungible and Compatible Biofuels | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Fungible and Compatible Biofuels Fungible and Compatible Biofuels The purpose of this study is to summarize the various barriers to more widespread distribution of biofuels through...

  14. On mitigating emissions leakage under biofuel policies

    E-Print Network [OSTI]

    Rajagopal, D; Rajagopal, D

    2015-01-01

    that are applicable to biofuel policies and beyond. Thisso marginal land for biofuel crops is limited. EnergyIndirect emissions of biofuel policies Figure 1 provides a

  15. ON THE INDIRECT EFFECT OF BIOFUEL

    E-Print Network [OSTI]

    Zilberman, D; Barrows, G; Hochman, G; Rajagopal, D

    2013-01-01

    and H. de Gorter. 2011. Biofuel Policies and Carbon Leakage.Environmental Impact of Biofuel Policies. Energy Policy.sions and Uncertainty for Biofuel Policies. Energy Policy.

  16. Cassava, a potential biofuel crop in China

    E-Print Network [OSTI]

    Jansson, C.

    2010-01-01

    Cassava, a potential biofuel crop in China Christer Janssoncassava; bioethanol; biofuel; metabolic engineering; Chinathe potentials of cassava in the biofuel sector and point to

  17. Optimization of Energy and Water Consumption in Cornbased Ethanol Plants

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    and waste water discharge. We consider the corn-based ethanol plant reported in Karuppiah et al. (2008 industrial operation and waste water is no longer discharged. Keywords: Energy, Biofuels, Alternative fuels, including the treatment and recycling of waste water (Petrakis, 2008) as shown later in this paper. The task

  18. Biofuel Feedstock Assessment For Selected Countries

    SciTech Connect (OSTI)

    Kline, Keith L; Oladosu, Gbadebo A; Wolfe, Amy K; Perlack, Robert D; Dale, Virginia H; McMahon, Matthew

    2008-02-01

    Findings from biofuel feedstock production assessments and projections of future supply are presented and discussed. The report aims to improve capabilities to assess the degree to which imported biofuel could contribute to meeting future U.S. targets to reduce dependence on imported oil. The study scope was focused to meet time and resource requirements. A screening process identified Argentina, Brazil, Canada, China, Colombia, India, Mexico, and the Caribbean Basin Initiative (CBI) region for initial analysis, given their likely role in future feedstock supply relevant to U.S. markets. Supply curves for selected feedstocks in these countries are projected for 2012, 2017 and 2027. The supply functions, along with calculations to reflect estimated supplies available for export and/or biofuel production, were provided to DOE for use in a broader energy market allocation study. Potential cellulosic supplies from crop and forestry residues and perennials were also estimated for 2017 and 2027. The analysis identified capacity to potentially double or triple feedstock production by 2017 in some cases. A majority of supply growth is derived from increasing the area cultivated (especially sugarcane in Brazil). This is supplemented by improving yields and farming practices. Most future supplies of corn and wheat are projected to be allocated to food and feed. Larger shares of future supplies of sugarcane, soybean and palm oil production will be available for export or biofuel. National policies are catalyzing investments in biofuel industries to meet targets for fuel blending that generally fall in the 5-10% range. Social and environmental concerns associated with rapid expansion of feedstock production are considered. If the 2017 projected feedstock supply calculated as 'available' for export or biofuel were converted to fuel, it would represent the equivalent of about 38 billion gallons of gasoline. Sugarcane and bagasse dominate the available supply, representing 64% of the total. Among the nations studied, Brazil is the source of about two-thirds of available supplies, followed distantly by Argentina (12%), India and the CBI region.

  19. Biofuel Feedstock Assessment for Selected Countries

    SciTech Connect (OSTI)

    Kline, K.L.; Oladosu, G.A.; Wolfe, A.K.; Perlack, R.D.; Dale, V.H.

    2008-02-18

    Findings from biofuel feedstock production assessments and projections of future supply are presented and discussed. The report aims to improve capabilities to assess the degree to which imported biofuel could contribute to meeting future U.S. targets to reduce dependence on imported oil. The study scope was focused to meet time and resource requirements. A screening process identified Argentina, Brazil, Canada, China, Colombia, India, Mexico, and the Caribbean Basin Initiative (CBI) region for initial analysis, given their likely role in future feedstock supply relevant to U.S. markets. Supply curves for selected feedstocks in these countries are projected for 2012, 2017 and 2027. The supply functions, along with calculations to reflect estimated supplies available for export and/or biofuel production, were provided to DOE for use in a broader energy market allocation study. Potential cellulosic supplies from crop and forestry residues and perennials were also estimated for 2017 and 2027. The analysis identified capacity to potentially double or triple feedstock production by 2017 in some cases. A majority of supply growth is derived from increasing the area cultivated (especially sugarcane in Brazil). This is supplemented by improving yields and farming practices. Most future supplies of corn and wheat are projected to be allocated to food and feed. Larger shares of future supplies of sugarcane, soybean and palm oil production will be available for export or biofuel. National policies are catalyzing investments in biofuel industries to meet targets for fuel blending that generally fall in the 5-10% range. Social and environmental concerns associated with rapid expansion of feedstock production are considered. If the 2017 projected feedstock supply calculated as ‘available’ for export or biofuel were converted to fuel, it would represent the equivalent of about 38 billion gallons of gasoline. Sugarcane and bagasse dominate the available supply, representing 64% of the total. Among the nations studied, Brazil is the source of about two-thirds of available supplies, followed distantly by Argentina (12%), India and the CBI region.

  20. The Role of Cellulosic Ethanol in Transportation

    SciTech Connect (OSTI)

    Robert M. Neilson, Jr.

    2007-10-01

    Petroleum provides essentially all of the energy used today in the transportation sector. To reduce this dependence on fossil energy, other fuels are beginning to be used, notably ethanol and biodiesel. Almost all fuel ethanol is produced by the conversion of corn grain to starch with subsequent fermentation to ethanol. In 2006, almost 5 billion gallons of fuel ethanol were produced, which used 17% of domestic corn production. The DOE has a goal to displace 30% of motor gasoline demand or 60 billion gallons per year by 2030. To achieve this goal, production of ethanol from lignocellulosic sources (e.g., agricultural residues, forest residues, and dedicated energy crops) is needed. This paper will describe the production of cellulosic ethanol as well as the issues and benefits associated with its production.

  1. Effect of milk composition upon the partition coefficients of diacetyl, acetaldehyde, and ethanol in acidified milk products 

    E-Print Network [OSTI]

    Wilke, Anthony Gerald

    1994-01-01

    Acidified milk samples were prepared with fat concentrations from 0 to 20% and solids-not-fat concentrations from 6 to 12%. The partition coefficients of acetaldehyde, ethanol, and diacetyl were determined in acidified samples at pH 4.4 and 4...

  2. Fuel Ethanol Oxygenate Production

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1Markets 9,WhyConsumption6

  3. Weekly Ethanol Production

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices Globaldieselgasolinemonthlysummer

  4. Sandia's Biofuels Program

    SciTech Connect (OSTI)

    Simmons, Blake; Singh, Seema; Lane, Todd; Reichardt, Tom; Davis, Ryan

    2014-07-22

    Sandia's biofuels program is focused on developing next-generation, renewable fuel solutions derived from biomass. In this video, various Sandia researchers discuss the program and the tools they employ to tackle the technical challenges they face.

  5. Sandia's Biofuels Program

    ScienceCinema (OSTI)

    Simmons, Blake; Singh, Seema; Lane, Todd; Reichardt, Tom; Davis, Ryan

    2014-07-24

    Sandia's biofuels program is focused on developing next-generation, renewable fuel solutions derived from biomass. In this video, various Sandia researchers discuss the program and the tools they employ to tackle the technical challenges they face.

  6. Market Drivers for Biofuels

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    or natural gas, for process energy 6 Ethanol Grain Sorghum Dry mill process, using only biogas from landfills, waste treatment plants, andor waste digesters for process energy...

  7. Biofuels and Sustainability Reports January 2010

    E-Print Network [OSTI]

    Pennycook, Steve

    and Sustainability Reports Biofuels, generally defined as liquid fuels derived from biological mate- rials, can be made from plants, vegetable oils, forest products, or waste materials. The raw materials can be grown specifically for fuel pur- poses, or can be the residues or wastes of existing supply and con- sumption chains

  8. Transportation Biofuels in the US A Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    support for ethanol and biodiesel in the United States.Biodiesel ..and $1.8 billion for biodiesel production [9]. The third

  9. Transportation Biofuels in the USA Preliminary Innovation Systems Analysis

    E-Print Network [OSTI]

    Eggert, Anthony

    2007-01-01

    support for ethanol and biodiesel in the United States.Biodiesel ..and $1.8 billion for biodiesel production [9]. The third

  10. GLOBAL BIOFUELS OUTLOOK MAELLE SOARES PINTO

    E-Print Network [OSTI]

    GLOBAL BIOFUELS OUTLOOK 2010-2020 MAELLE SOARES PINTO DIRECTOR BIOFUELS EUROPE & AFRICA WORLD BIOFUELS MARKETS, ROTTERDAM MARCH 23, 2011 #12;Presentation Overview · Global Outlook ­ Biofuels Mandates in 2010 ­ Total Biofuels Supply and Demand ­ Regional Supply and Demand Outlook to 2020 ­ Biofuels

  11. II. Greenhouse gas markets, carbon dioxide credits and biofuels17

    E-Print Network [OSTI]

    biofuels production. GHG policies18 that create a carbon price either through an emissions trading system analysed in the previous chapter. GHG policies that create an emissions trading system such as the cap

  12. New Online Tool Expands Analysis of Biofuels' Water Impact |...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    As with the previous two versions, WATER 3.0 quantifies the water footprint of various biofuel pathways, providing details of the water consumption required for the production of...

  13. Meeting the Demand for Biofuels: Impact on Land Use and Carbon Mitigation

    SciTech Connect (OSTI)

    Khanna, Madhu; Jain, Atul; Onal, Hayri; Scheffran, Jurgen; Chen, Xiaoguang; Erickson, Matt; Huang, Haixiao; Kang, Seungmo.

    2011-08-14

    The purpose of this research was to develop an integrated, interdisciplinary framework to investigate the implications of large scale production of biofuels for land use, crop production, farm income and greenhouse gases. In particular, we examine the mix of feedstocks that would be viable for biofuel production and the spatial allocation of land required for producing these feedstocks at various gasoline and carbon emission prices as well as biofuel subsidy levels. The implication of interactions between energy policy that seeks energy independence from foreign oil and climate policy that seeks to mitigate greenhouse gas emissions for the optimal mix of biofuels and land use will also be investigated. This project contributes to the ELSI research goals of sustainable biofuel production while balancing competing demands for land and developing policy approaches needed to support biofuel production in a cost-effective and environmentally friendly manner.

  14. Sorghum to Ethanol Research

    SciTech Connect (OSTI)

    Dahlberg, Jeff; Wolfrum, Ed

    2010-06-30

    The development of a robust source of renewable transportation fuel will require a large amount of biomass feedstocks. It is generally accepted that in addition to agricultural and forestry residues, we will need crops grown specifically for subsequent conversion into fuels. There has been a lot of research on several of these so-called �dedicated bioenergy crops� including switchgrass, miscanthus, sugarcane, and poplar. It is likely that all of these crops will end up playing a role as feedstocks, depending on local environmental and market conditions. Many different types of sorghum have been grown to produce syrup, grain, and animal feed for many years. It has several features that may make it as compelling as other crops mentioned above as a renewable, sustainable biomass feedstock; however, very little work has been done to investigate sorghum as a dedicated bioenergy crop. The goal of this project was to investigate the feasibility of using sorghum biomass to produce ethanol. The work performed included a detailed examination of the agronomics and composition of a large number of sorghum varieties, laboratory experiments to convert sorghum to ethanol, and economic and life-cycle analyses of the sorghum-to-ethanol process. This work showed that sorghum has a very wide range of composition, which depended on the specific sorghum cultivar as well as the growing conditions. The results of laboratory- and pilot-scale experiments indicated that a typical high-biomass sorghum variety performed very similarly to corn stover during the multi-step process required to convert biomass feedstocks to ethanol; yields of ethanol for sorghum were very similar to the corn stover used as a control in these experiments. Based on multi-year agronomic data and theoretical ethanol production, sorghum can achieve more than 1,300 gallons of ethanol per acre given the correct genetics and environment. In summary, sorghum may be a compelling dedicated bioenergy crop that could help provide a major portion of the feedstocks required to produce renewable domestic transportation fuels.

  15. Sorghum to Ethanol Research

    SciTech Connect (OSTI)

    Jeff Dahlberg, Ph D; Ed Wolfrum, Ph D

    2010-06-30

    The development of a robust source of renewable transportation fuel will require a large amount of biomass feedstocks. It is generally accepted that in addition to agricultural and forestry residues, we will need crops grown specifically for subsequent conversion into fuels. There has been a lot of research on several of these so-called "dedicated bioenergy crops" including switchgrass, miscanthus, sugarcane, and poplar. It is likely that all of these crops will end up playing a role as feedstocks, depending on local environmental and market conditions. Many different types of sorghum have been grown to produce syrup, grain, and animal feed for many years. It has several features that may make it as compelling as other crops mentioned above as a renewable, sustainable biomass feedstock; however, very little work has been done to investigate sorghum as a dedicated bioenergy crop. The goal of this project was to investigate the feasibility of using sorghum biomass to produce ethanol. The work performed included a detailed examination of the agronomics and composition of a large number of sorghum varieties, laboratory experiments to convert sorghum to ethanol, and economic and life-cycle analyses of the sorghum-to-ethanol process. This work showed that sorghum has a very wide range of composition, which depended on the specific sorghum cultivar as well as the growing conditions. The results of laboratory- and pilot-scale experiments indicated that a typical high-biomass sorghum variety performed very similarly to corn stover during the multi-step process required to convert biomass feedstocks to ethanol; yields of ethanol for sorghum were very similar to the corn stover used as a control in these experiments. Based on multi-year agronomic data and theoretical ethanol production, sorghum can achieve more than 1,300 gallons of ethanol per acre given the correct genetics and environment. In summary, sorghum may be a compelling dedicated bioenergy crop that could help provide a major portion of the feedstocks required to produce renewable domestic transportation fuels.

  16. National Geo-Database for Biofuel Simulations and Regional Analysis of Biorefinery Siting Based on Cellulosic Feedstock Grown on Marginal Lands

    SciTech Connect (OSTI)

    Izaurralde, Roberto C.; Zhang, Xuesong; Sahajpal, Ritvik; Manowitz, David H.

    2012-04-01

    The goal of this project undertaken by GLBRC (Great Lakes Bioenergy Research Center) Area 4 (Sustainability) modelers is to develop a national capability to model feedstock supply, ethanol production, and biogeochemical impacts of cellulosic biofuels. The results of this project contribute to sustainability goals of the GLBRC; i.e. to contribute to developing a sustainable bioenergy economy: one that is profitable to farmers and refiners, acceptable to society, and environmentally sound. A sustainable bioenergy economy will also contribute, in a fundamental way, to meeting national objectives on energy security and climate mitigation. The specific objectives of this study are to: (1) develop a spatially explicit national geodatabase for conducting biofuel simulation studies and (4) locate possible sites for the establishment of cellulosic ethanol biorefineries. To address the first objective, we developed SENGBEM (Spatially Explicit National Geodatabase for Biofuel and Environmental Modeling), a 60-m resolution geodatabase of the conterminous USA containing data on: (1) climate, (2) soils, (3) topography, (4) hydrography, (5) land cover/ land use (LCLU), and (6) ancillary data (e.g., road networks, federal and state lands, national and state parks, etc.). A unique feature of SENGBEM is its 2008-2010 crop rotation data, a crucially important component for simulating productivity and biogeochemical cycles as well as land-use changes associated with biofuel cropping. ARRA support for this project and to the PNNL Joint Global Change Research Institute enabled us to create an advanced computing infrastructure to execute millions of simulations, conduct post-processing calculations, store input and output data, and visualize results. These computing resources included two components installed at the Research Data Center of the University of Maryland. The first resource was 'deltac': an 8-core Linux server, dedicated to county-level and state-level simulations and PostgreSQL database hosting. The second resource was the DOE-JGCRI 'Evergreen' cluster, capable of executing millions of simulations in relatively short periods. ARRA funding also supported a PhD student from UMD who worked on creating the geodatabases and executing some of the simulations in this study. Using a physically based classification of marginal lands, we simulated production of cellulosic feedstocks from perennial mixtures grown on these lands in the US Midwest. Marginal lands in the western states of the US Midwest appear to have significant potential to supply feedstocks to a cellulosic biofuel industry. Similar results were obtained with simulations of N-fertilized perennial mixtures. A detailed spatial analysis allowed for the identification of possible locations for the establishment of 34 cellulosic ethanol biorefineries with an annual production capacity of 5.6 billion gallons. In summary, we have reported on the development of a spatially explicit national geodatabase to conduct biofuel simulation studies and provided simulation results on the potential of perennial cropping systems to serve as feedstocks for the production of cellulosic ethanol. To accomplish this, we have employed sophisticated spatial analysis methods in combination with the process-based biogeochemical model EPIC. The results of this study will be submitted to the USDOE Bioenergy Knowledge Discovery Framework as a way to contribute to the development of a sustainable bioenergy industry. This work provided the opportunity to test the hypothesis that marginal lands can serve as sources of cellulosic feedstocks and thus contribute to avoid potential conflicts between bioenergy and food production systems. This work, we believe, opens the door for further analysis on the characteristics of cellulosic feedstocks as major contributors to the development of a sustainable bioenergy economy.

  17. U.S. and China Increase Biofuels Cooperation Ahead of the Third...

    Energy Savers [EERE]

    and Reform Commission (NDRC) agreed to strengthen and expand cooperation on biofuels production and use, ahead of the third U.S. - China Strategic Economic Dialogue set to...

  18. Exploring the Utilization of Complex Algal Communities to Address Algal Pond Crash and Increase Annual Biomass Production for Algal Biofuels

    SciTech Connect (OSTI)

    Hamilton, Cyd E.

    2014-03-25

    This white paper briefly reviews the research literature exploring complex algal communities as a means of increasing algal biomass production via increased tolerance, resilience, and resistance to a variety of abiotic and biotic perturbations occurring within harvesting timescales. This paper identifies what data are available and whether more research utilizing complex communities is needed to explore the potential of complex algal community stability (CACS) approach as a plausible means to increase biomass yields regardless of ecological context and resulting in decreased algal-based fuel prices by reducing operations costs. By reviewing the literature for what we do and do not know, in terms of CACS methodologies, this report will provide guidance for future research addressing pond crash phenomena.

  19. Food for fuel: The price of ethanol

    E-Print Network [OSTI]

    Albino, Dominic K; Bar-Yam, Yaneer

    2012-01-01

    Conversion of corn to ethanol in the US since 2005 has been a major cause of global food price increases during that time and has been shown to be ineffective in achieving US energy independence and reducing environmental impact. We make three key statements to enhance understanding and communication about ethanol production's impact on the food and fuel markets: (1) The amount of corn used to produce the ethanol in a gallon of regular gas would feed a person for a day, (2) The production of ethanol is so energy intensive that it uses only 20% less fossil fuel than gasoline, and (3) The cost of gas made with ethanol is actually higher per mile because ethanol reduces gasoline's energy per gallon.

  20. Process of concentrating ethanol from dilute aqueous solutions thereof

    DOE Patents [OSTI]

    Oulman, Charles S. [Ames, IA; Chriswell, Colin D. [Slater, IA

    1981-07-07

    Relatively dilute aqueous solutions of ethanol are concentrated by passage through a bed of a crystalline silica polymorph, such as silicalite, to adsorb the ethanol with residual dilute feed in contact with the bed, which is displaced by passing concentrated aqueous ethanol through the bed without displacing the adsorbed ethanol. A product concentrate is then obtained by removing the adsorbed ethanol from the bed together with at least a portion of the concentrated aqueous ethanol used as the displacer liquid. This process permits ethanol to be concentrated from dilute fermentation beers, which may contain from 6 to 10% ethanol, to obtain a concentrate product at very low energy cost having an ethanol concentration in excess of 95%, such as a concentration of from 98 to 99.5%.