Show simple item record

dc.contributor.advisorTilley, David Ren_US
dc.contributor.authorFelix, Erika Ruthen_US
dc.date.accessioned2007-06-22T05:31:01Z
dc.date.available2007-06-22T05:31:01Z
dc.date.issued2007-01-22
dc.identifier.urihttp://hdl.handle.net/1903/6671
dc.description.abstractBiofuels are considered a substitute for petroleum-fuels, but to be viable they should not depend heavily upon non-renewable resources. The objective of this study was to estimate the ultimate amount of energy required to produce liquid-fuels from switchgrass, hybrid poplar, soybean, and castorbean. Emergy (with an "m") accounting was used to integrate all environmental, fossil fuel, and human-service inputs used throughout the production chain from agricultural field to processing facility. Depending on feedstock type and conversion yields, environmental inputs were between 21-44%, fossil fuels were 18-73% and human-derived services were 2-61%. Gallons of transportation fuel produced per gallon of petroleum used ranged from 0.06 to 4.2 for ethanol and 2.6 to 4.4 for biodiesel. No biofuel was made with less than 75% non-renewable resources. Energy embodied in "hidden" indirect paths ranged from 38-99%. The viability of replacing petroleum with cellulosic ethanol or biodiesel is highly questionable.en_US
dc.format.extent1211368 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.titleIntegrated Energy, Environmental and Financial Analysis of Biofuel Production from Switchgrass, Hybrid Poplar, Soybean and Castorbeanen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentBiological Resources Engineeringen_US
dc.subject.pqcontrolledEnergyen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pqcontrolledAgriculture, Generalen_US
dc.subject.pquncontrolledBiofuelen_US
dc.subject.pquncontrolledBiomassen_US
dc.subject.pquncontrolledBioethanolen_US
dc.subject.pquncontrolledBiodieselen_US
dc.subject.pquncontrolledEmergyen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record