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Registros recuperados: 5
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Cost to Produce Cellulosic Biomass Feedstock: Four Perennial Grass Species Compared AgEcon
Haque, Mohua; Epplin, Francis M.; Aravindhakshan, Sijesh C.; Taliaferro, Charles M..
Switchgrass has been proposed as a dedicated energy crop to fulfill long-term policy goals. Production costs were determined for switchgrass and three alternative perennial grass species for four levels of nitrogen fertilizer and two harvest systems. For the alternatives evaluated, biomass production cost per ton was lowest for switchgrass.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/6817
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Optimal Switchgrass Harvest Strategies Accounting for Yield and Nitrogen Requirement Differences by Month of Harvest AgEcon
Haque, Mohua; Epplin, Francis M..
Extending switchgrass harvest over many months would require a smaller investment in harvest machines, but would result in a lower average harvestable yield per acre and would require more nitrogen fertilizer, less land for storage, and more land for growing switchgrass. A model was constructed and solved to determine the optimal strategy.
Tipo: Conference Paper or Presentation Palavras-chave: Biofuel; Cellulosic; Ethanol; Harvest; Mathematical programming; Nitrogen; Switchgrass; Crop Production/Industries; Resource /Energy Economics and Policy; Q10; Q42.
Ano: 2010 URL: http://purl.umn.edu/56435
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Policies to Facilitate Conversion of Millions of Acres to the Production of Biofuel Feedstock AgEcon
Epplin, Francis M.; Haque, Mohua.
First-generation grain ethanol biofuel has affected the historical excess capacity problem in U.S. agriculture. Second-generation cellulosic ethanol biofuel has had difficulty achieving cost-competitiveness. Third-generation drop-in biofuels are under development. If lignocellulosic biomass from perennial grasses becomes the feedstock of choice for second- and third-generation biorefineries, an integrated system could evolve in which a biorefinery directly manages feedstock production, harvest, storage, and delivery. Modeling was conducted to determine the potential economic benefits from an integrated system. Relatively low-cost public policies that could be implemented to facilitate economic efficiency are proposed.
Tipo: Journal Article Palavras-chave: Biomass; Bio-oil; Cellulosic; Drop-in fuels; Ethanol; Land-lease contract; Lignocellulosic; Pyrolysis; Switchgrass; Resource /Energy Economics and Policy; Q16; Q18; Q15; Q42.
Ano: 2011 URL: http://purl.umn.edu/113532
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Managing Nitrogen and Phosphorus Nutrients for Switchgrass Produced for Bioenergy Feedstock in Phosphorus-Deficient Soil AgEcon
Haque, Mohua; Biermacher, Jon T.; Kering, Maru K.; Guretzky, John A..
There is limited information available explaining the agronomic and economic relationships between yield and nitrogen and phosphorus applications to growing switchgrass produced in phosphorus-deficient soils. The objective of this study was to determine the effects of nitrogen and phosphorus fertilizers on feedstock yield and measures of expected total cost, gross revenue, net return, and breakeven price of feedstock produced in phosphorus-deficient soils in the southern Great Plains. Data were collected from a three-year, two-location agronomic field study conducted in south-central Oklahoma. Two discrete nitrogen treatments (0 and 134 kg ha-1) and four discrete phosphorus treatments (0, 30, 60 and 90 kg ha-1) were randomly assigned to small plots...
Tipo: Presentation Palavras-chave: Bioenergy feedstock; Economics; Phosphorus-deficient soils; Nitrogen; Switchgrass; Crop Production/Industries; Environmental Economics and Policy; Production Economics.
Ano: 2012 URL: http://purl.umn.edu/119765
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Switchgrass to Ethanol: A Field to Fuel Approach AgEcon
Haque, Mohua; Epplin, Francis M..
The U.S. Energy Independence and Security Act of 2007 mandates the production of 16 billion gallons of cellulosic biofuels by 2022. Desirable feedstock properties, biomass to biofuel conversion rate, and investment required in plant and equipment differs depending on which of several competing technologies is used. The objective is to determine the breakeven ethanol price for a cellulosic biorefinery. A comprehensive mathematical programming model that encompasses the chain from land acquisition to ethanol production was constructed and solved. For a capital requirement of $400 million for a 100 million gallons per year plant and a conversion rate of 100 gallons of ethanol per dry ton, the breakeven ethanol price is $1.91 per gallon: $0.20 for land rental...
Tipo: Conference Paper or Presentation Palavras-chave: Biorefinery; Breakeven price; Cellulosic ethanol; Mathematical programming; Switchgrass; Agricultural and Food Policy; Crop Production/Industries; Production Economics; Q42; Q48.
Ano: 2010 URL: http://purl.umn.edu/61294
Registros recuperados: 5
Primeira ... 1 ... Última
 

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