Integrated forest biorefinery applied to a CTMP process: pre-extraction of acetic acid

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dc.contributor.advisorYuan, Zhirun
dc.contributor.advisorNi, Yonghao
dc.contributor.authorHe, Chengda
dc.date.accessioned2023-03-01T16:19:49Z
dc.date.available2023-03-01T16:19:49Z
dc.date.issued2012
dc.date.updated2020-06-11T00:00:00Z
dc.description.abstractAcetic acid is one of the promising bio-products in the value prior to pulping (VPP) concept, which is one of the options for Integrated Forest Bio-refinery. In a typical chemi-thermo-mechanical (CTMP) process the chemical pre-treatment can be easily retrofitted into the pre-extraction stage, the potential of pre-extraction of acetic acid and effect on pulp properties was evaluated in this study. The pre-extraction yield of acetic acid increased with the increase of cooking time and temperature. The maximum yield was 31.25% at 150 °C and 60 minutes right after the cooking in the digester manufactured by M/K System, Inc. The pre-extraction yield increased to 42.05% after the cooked chips were broken down into pulps, indicating that some of the released acetic acid was trapped inside chips and a post-mechanical treatment was required for acetic acid to be easily diffused into the liquid phase. Pilot trials at selected conditions indicated that compared with the control, at a similar specific refining energy and freeness, pulps produced with acid pre-extraction had lower bulk, less long fibers, lower brightness but similar or better strength properties.
dc.description.copyright©Chengda He, 2012
dc.description.noteScanned from archival print submission.
dc.description.noteM.Sc.E. University of New Brunswick, Department of Chemical Engineering, 2012.
dc.formattext/xml
dc.format.extentx, 81 pages
dc.format.mediumelectronic
dc.identifier.oclc(OCoLC)157345955en
dc.identifier.otherThesis 8994
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/13529
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineChemical Engineering
dc.subject.lcshMechanical pulping process.
dc.subject.lcshPulping.
dc.subject.lcshAcetic acid -- Separation.
dc.subject.lcshForest biomass.
dc.titleIntegrated forest biorefinery applied to a CTMP process: pre-extraction of acetic acid
dc.typemaster thesis
thesis.degree.disciplineChemical Engineering
thesis.degree.fullnameMaster of Science in Engineering
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelmasters
thesis.degree.nameM.Sc.E.

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