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dc.contributor.advisorLøvås, Teresenb_NO
dc.contributor.advisorLånke, Arne Fredriknb_NO
dc.contributor.advisorKempegowda, Rajesh S.nb_NO
dc.contributor.authorBerg, Heidi Odegårdnb_NO
dc.date.accessioned2014-12-19T11:50:51Z
dc.date.available2014-12-19T11:50:51Z
dc.date.created2013-09-19nb_NO
dc.date.issued2013nb_NO
dc.identifier649618nb_NO
dc.identifierntnudaim:9975nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/235181
dc.description.abstractThis work investigates one biochemical and one thermochemical biomass-to-liquid biofuel conversion pathway in terms of lignocellulose conversion to liquid Fischer-Tropsch diesel. The focus has been on comparing the two conversion pathways in terms of identifying their energy flows and respective feed to fuel ratios. The conversion pathways investigated comprise two-stage conversion sequences including biomass-to-gas conversion and gas-to-liquid conversion, exerted by anaerobic digestion or gasification followed by Fischer-Tropsch synthesis. A systematic documentation of available technologies regarding the two conversion pathways is performed by literature study. The pathways are modeled in Aspen Plus supplied with FORTRAN declarations. Mass flows and composition for the two pathways are collected from simulations and energy flows are identified by heating value and energy balance calculations. The energy flows are presented graphically and by ESankey-diagrams, and the resulting energy utilities and feed to fuel ratios are presented graphically and in tabular form.The key finding is that for the application to Fischer-Tropsch processes, the biochemical conversion pathway is less energy effective in terms of gas-to-liquid conversion. This result is observed both in terms of energy utility for the pathway and might indicate that biochemical pathways are more energy consuming than conventional thermochemical gas-to-liquid conversion. However, results on feed to fuel ratio indicate that the biochemical conversion of lignocellulose to Fischer-Tropsch diesel is competitive when compared to thermochemical conversion.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for energi- og prosessteknikknb_NO
dc.titleComparison of conversion pathways for lignocellulosic biomass to biofuel in Mid-Norwaynb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber153nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for energi- og prosessteknikknb_NO


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