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dc.contributor.authorAvellar, Brecc K.en_US
dc.date.accessioned2014-03-14T21:31:46Z
dc.date.available2014-03-14T21:31:46Z
dc.date.issued1990-06-04en_US
dc.identifier.otheretd-03142009-040725en_US
dc.identifier.urihttp://hdl.handle.net/10919/41620
dc.description.abstract

A 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_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1990.A984.pdfen_US
dc.subjectPulp millsen_US
dc.subject.lccLD5655.V855 1990.A984en_US
dc.titleTechnical review and economic evaluation :steam- explosion/fractionation of biomassen_US
dc.typeThesisen_US
dc.contributor.departmentChemical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineChemical Engineeringen_US
dc.contributor.committeechairGlasser, Wolfgang G.en_US
dc.contributor.committeememberMichelsen, Donald L.en_US
dc.contributor.committeememberVelander, William H.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03142009-040725/en_US
dc.date.sdate2009-03-14en_US
dc.date.rdate2009-03-14
dc.date.adate2009-03-14en_US


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