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| Registros recuperados: 473 | |
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| Tembo, Gelson; Epplin, Francis M.; Huhnke, Raymond L.. |
| While theoretically more efficient than starch-based ethanol production systems, conversion of lignocellulosic biomass to ethanol is not without major challenges. A multi-region, multi-period, mixed integer mathematical programming model encompassing alternative feedstocks, feedstock production, delivery, and processing is developed. The model is used to identify key cost components and potential bottlenecks, and to reveal opportunities for reducing costs and prioritizing research. The research objective was to determine for specific regions in Oklahoma the most economical source of lignocellulosic biomass, timing of harvest and storage, inventory management, biorefinery size, and biorefinery location, as well as the breakeven price of ethanol, for a... |
| Tipo: Journal Article |
Palavras-chave: Biomass; Biorefinery location; Ethanol; Integrative investment appraisal; Logistics; Mixed integer programming; Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/31070 |
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| Torre Ugarte, Daniel de la; Walsh, Marie E.; Shapouri, Hosein; Slinsky, Stephen P.. |
| In response to energy security concerns, alternative energy programs such as biomass energy systems are being developed to provide energy in the 21st century. For the biomass industry to expand, a variety of feedstocks will need to be utilized. Large scale production of bioenergy crops could have significant impacts on the United States agricultural sector in terms of quantities, prices and production location of traditional crops as well as farm income. Though a number of scenarios were examined to study the impact of bioenergy crop production on the agricultural sector, two cropland scenarios are presented in this report. Under the wildlife management scenario, the analysis indicates that, at $30/dry ton (dt) for switchgrass,... |
| Tipo: Report |
Palavras-chave: Alternative crops; Bioenergy crops; Biomass; Conservation Reserve Program; Crop acreage shifts; Crop budgeting; Economic feasibility; Economic impact; Hybrid poplars; Hybrid willow; POLYSYS; Switchgrass; Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/33997 |
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| Leistritz, F. Larry; Hodur, Nancy M.; Senechal, Donald M.; Stowers, Mark D.; McCalla, Darold; Saffron, Chris M.. |
| Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, has enhanced interest in biobased products and fuels. The work reported here analyzes the feasibility of a multi-product biorefinery using wheat straw as feedstock that produces ethanol, electricity, and cellulose nanofibers. The nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The analysis indicates that, at 2005 prices and costs, the biorefinery would be marginally profitable. Anticipated advances in bioprocessing technology would enhance profitability. The facility would also make a substantial contribution to the biorefinery site... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Economic development; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/7323 |
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| Petrolia, Daniel R.. |
| Forest residues are being considered as potential feedstock for a biomass-to-ethanol facility in Minnesota (USA), using residues from major wood-producing counties in Minnesota, Wisconsin, and Michigan. Results indicate that marginal residue costs delivered to a conversion facility would be $56-80/Mg for a small (95-189 MM liters) plant, and about $81/Mg for a larger (379 MM liters) plant. Output beyond these levels would involve substitution of lower-cost market pulpwood as the plant feedstock because of relatively high marginal residue costs. Sensitivity analysis indicates that either a 20-percent increase or decrease in the quantity of available residue would impact marginal cost estimates by no more than $15/Mg. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biomass; Economics; Ethanol; Residue supply; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/14020 |
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| Kumarappan, Subbu; Ivanic, Rasto. |
| When the lignocellulosic biofuels industry reaches maturity and many types of biomass sources become economically viable, management of multiple feedstock supplies – that vary in their yields, density (tons per unit area), harvest window, storage and seasonal costs, storage losses, transport distance to the production plant – will become increasingly important for the success of individual enterprises. The manager’s feedstock procurement problem is modeled as a multi-period sequence problem to account for dynamic management over time. The case is illustrated with a hypothetical 53 million annual US gallon cellulosic ethanol plant located in south west Kansas that requires approximately 700,000 metric dry tons of biomass. The problem is framed over 40... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cellulosic ethanol; Feedstock; Switchgrass; Miscanthus; Corn stover; Optimization; Biofuels; Biomass; Energy; Renewable; Agribusiness. |
| Ano: 2009 |
URL: http://purl.umn.edu/49407 |
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| Shumaker, George A.; Luke-Morgan, Audrey S.; McKissick, John C.. |
| This study investigates the potential for using biomass for the production of electricity in Georgia. The volume, important characteristics, and delivered costs per unit of energy are estimated for various locally produced biomass. Production of synthetic fuels using both pyrolysis and gasification technologies is investigated as potential means for converting biomass into electricity. Capital and operating costs for each of these two technologies are projected across three different scales of production. Estimated costs per unit of electricity generated are determined. It appears, under the conditions modeled, these technologies are not cost competitive with currently used technologies. Significant subsidies would be needed to induce the adoption of these... |
| Tipo: Journal Article |
Palavras-chave: Bio-electricity; Bio-feedstocks; Biomass; Cost; Electricity; Agribusiness; Resource /Energy Economics and Policy. |
| Ano: 2009 |
URL: http://purl.umn.edu/90661 |
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| Petrolia, Daniel R.. |
| Corn stover harvest and transport cost functions were estimated for two harvest operations for a proposed biomass-to-ethanol conversion facility located in southern Minnesota, USA. This work presents an alternative methodology to estimating corn stover quantities and harvest costs at the county level, taking into account county-specific yields, transportation distances, erosion constraints, machinery specifications, and other key variables. Monte Carlo simulation was also used to estimate the probability distribution of costs under alternative assumption on key parameters whose values vary widely in the literature. Marginal stover cost for 50MM gal/year of ethanol output was estimated at $54/dt ($0.77/gal ethanol) for the more intensive harvest method... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biomass; Corn stover; Economics; Ethanol; Lignocellulose; Monte Carlo; Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/14213 |
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| Rivas Lucero, Bertha Alicia; Zuniga Avila, Gabriel; Saenz Solis, Jorge Iram; Guerrero Morales, Sergio; Segovia Lerma, Armando; Morales Morales, Hugo Armando. |
| Currently almost all energy is provided by fossil fuels that increase greenhouse gas emissions contributing to global warming. These emissions can be reduced with the use of renewable energy produced from biomass such a livestock manure. The manure is raw material for production of electricity and thermal energy. Anaerobic digestion of waste can reduce emissions by capturing methane, a greenhouse gas produced by waste in facilities large and small scale. The South Central region of the state of Chihuahua has the potential for renewable energy production from biomass and waste are approximately 58,000 head of cattle, valuing a daily output of 2,900 m3 of sewage and 10,000 m3 of waste water can cause environmental problems. The estimated biogas production... |
| Tipo: Article |
Palavras-chave: Anaerobic digester; Biogas; Biomass; Renewable energy.; Agribusiness. |
| Ano: 2012 |
URL: http://purl.umn.edu/120496 |
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| Marconato, Mariane Silva; Santini, Giuliana Aparecida. |
| Durante muito tempo, os recursos fósseis e hídricos foram os grandes propulsores da civilização e da economia. O Brasil também se apoiou nessas fontes energéticas para o desenvolvimento de atividades industriais, agrícolas, de serviços e da própria sociedade. Entretanto, vive-se hoje uma crise no abastecimento energético, em função da problemática geopolítica, econômica e ambiental em torno da extração e comercialização desses recursos, uma vez que possuem ainda, caráter não renovável, portanto, finito na natureza. Os escassos investimentos governamentais e a abertura econômica do setor energético resultou no fim do monopólio energético, o que favoreceu a implantação de sistemas alternativos, na maioria, advindos da biomassa. Dentre esses, destaca-se a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Energia; Fóssil; Hídrico; Renovável; Biomassa; Energy; Fossil; Water; Renewable; Biomass; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/112629 |
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| Elbehri, Aziz; McDougall, Robert; Horridge, Mark. |
| This paper describes a global model for agriculture and bioenergy (GLOMAB) that incorporates biomass, biofuels and bioelectricity sectors into the GTAP-Energy model by expanding the global GTAP database, production and consumption structures. Biofuels are separated between first- generation (sugar ethanol, starch ethanol) and second- generation (cellulosic ethanol) biofuels and associated biomass feedstocks (maize, sugar cane, crop residues, woody biomass). Beside biofuels, the model also incorporates bioelectricity (as separate form conventional electricity) which competes for the same biomass feedstocks with cellulosic ethanol sector (agricultural residues, woody biomass). With this broad-based representation of the bioenergy system likely to prevail... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Biofuels; Renewable Energy; Biomass; Agricultural Markets; Computable General Equilibrium (CGE); Food Security and Poverty; Resource /Energy Economics and Policy; C68; Q18; Q42; R14. |
| Ano: 2009 |
URL: http://purl.umn.edu/51914 |
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| Magda, Robert. |
| Összességében megállapítható, hogy Magyarországon az elmúlt fél évszázadban rendkívül megnőtt az energiafelhasználás, ami többnyire a fosszilis tüzelőanyagokból nyert energiára alapult. Ez arra készteti a jelen és a jövő kor társadalmát, hogy törekedjen a rendelkezésre álló megújuló energiaforrások felhasználásának előtérbe helyezésére, melyek használata a fenntarthatóság és a versenyképesség szempontjából sem elhanyagolható, hiszen ismert, hogy napjaink egyik kritikus költségtényezőjét adják az energiaköltségek. A megoldásban jelentős szerep hárul a vidéki társadalmakra, mert hiába történik az energiafelhasználás zöme az urbanizált területeken, az energia-előállítás, kitermelés a vidékre koncentrálódik. A fosszilis tüzelőanyagok korlátaiból adódóan új... |
| Tipo: Article |
Palavras-chave: Energiafüggőség; Megújuló energiahordozók; Biomassza; Foglalkoztatás; Energy dependence; Renewable energy; Biomass; Employment; Community/Rural/Urban Development; Labor and Human Capital. |
| Ano: 2011 |
URL: http://purl.umn.edu/119936 |
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| Registros recuperados: 473 | |
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