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Intrinsic dissolution kinetics and topochemistry of xylan, mannan, and lignin during auto-hydrolysis of red maple wood meal
SI Grp, Proc Technol Grp, Morgantown, WV USA.;West Virginia Univ, Wood Sci & Technol Dept, Morgantown, WV 26506 USA..
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0002-8614-6291
Univ Maine, 537 Jenness Hall, Orono, ME 04469 USA..
2019 (Engelska)Ingår i: Canadian Journal of Chemical Engineering, ISSN 0008-4034, E-ISSN 1939-019X, Vol. 97, nr 3, s. 649-661Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

High temperature aqueous treatment of wood is the preferred technology for deconstructing lignocellulosics. Many studies have been carried out on the kinetics and mechanism of hot-water extraction. However, most were performed in batch or integral plug flow reactors, which are not optimal for measuring intrinsic dissolution kinetics of the lignocellulosic components. Therefore, we used a continuous mixed batch reactor (or Berty reactor) to determine the intrinsic dissolution kinetics of xylan, mannan, and lignin from milled hardwood (Acer rubrum) at three different temperatures (150, 160, and 170 degrees C) and four constant pH values: 2, 3, 4, and 5. During the initial phase of autohydrolysis (carbohydrate-free), lignin and (lignin-free) xylan dissolve starting at a high rate and then a slowly decreasing rate, respectively. This is followed by the dissolution of xylan-lignin complexes and finally cellulose xylan complexes when cellulose has been significantly hydrolysed. The kinetics and molecular weight distribution of the removed wood polymers are used to describe the topochemistry of autohydrolysis based on recent knowledge of the ultrastructure of hardwood fibres.

Ort, förlag, år, upplaga, sidor
WILEY , 2019. Vol. 97, nr 3, s. 649-661
Nyckelord [en]
biomass conversion, auto-hydrolysis, kinetics, mechanism, continuous mixed batch reactor
Nationell ämneskategori
Pappers-, massa- och fiberteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-245131DOI: 10.1002/cjce.23373ISI: 000458447500004Scopus ID: 2-s2.0-85061384863OAI: oai:DiVA.org:kth-245131DiVA, id: diva2:1296055
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QC 20190313

Tillgänglig från: 2019-03-13 Skapad: 2019-03-13 Senast uppdaterad: 2019-06-11Bibliografiskt granskad

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