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dc.contributor.authorAvellar, Brecc K.en
dc.date.accessioned2014-03-14T21:31:46Zen
dc.date.available2014-03-14T21:31:46Zen
dc.date.issued1990-06-04en
dc.identifier.otheretd-03142009-040725en
dc.identifier.urihttp://hdl.handle.net/10919/41620en
dc.description.abstractA series of process design and economics models have been created which calculate the process cost for several scenarios in steam-explosion/fractionation of wood. Steam -explosion pulping may prove to be an alternative to currently practiced standard pulping processes which require large capital investments, cause significant environmental problems, and produce a narrow range of products. In addition, steam-explosion/fractionation technology may offer the opportunity to produce chemicals and materials from biomass at a lower raw material and process cost than the alternative petrochemical feedstocks. The models are a series of modular computer simulations, where each module summarizes a particular group of unit operations with respect to mass balance, energy requirements, and process cost including utilities, capital, labor, and other related costs. These modules are compiled into 3 groups of scenarios: 1) unprocessed steam-exploded wood for use as enzyme! acid hydrolysis feedstock, hardboard production, or as unbleached pulp, 2) water extracted steam-exploded wood for recovery of pentosan polysaccharides and a lignocellulosic fiber, and 3) water and aqueous solvent (alkali or ethanol) extracted steam -exploded wood for recovery of pentosan polysaccharides, lignin polymers, and a cellulose -rich, unbleached fiber. For the base case evaluated, the cost of producing a 50% moisture, based on total weight, steam-exploded fiber is the raw material cost, dry basis, plus 3.5 cents! Lb of raw material consumed, dry basis. For Southwestern Virginia hardwoods at 2 cents/Lb ($40 per ton), dry basis, the total process cost is 5.5 cents/ Lb.en
dc.format.extentx, 138 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 23612853en
dc.relation.haspartLD5655.V855_1990.A984.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.A984en
dc.subject.lcshPulp mills -- Researchen
dc.titleTechnical review and economic evaluation: steam- explosion/fractionation of biomassen
dc.typeThesisen
dc.contributor.departmentChemical Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineChemical Engineeringen
dc.contributor.committeechairGlasser, Wolfgang G.en
dc.contributor.committeememberMichelsen, Donald L.en
dc.contributor.committeememberVelander, William H.en
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03142009-040725/en
dc.date.sdate2009-03-14en
dc.date.rdate2009-03-14en
dc.date.adate2009-03-14en


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