Hydrothermal carbonization of pulp mill streams

Hanne Wikberg (Corresponding Author), Taina Ohra-aho, Mari Honkanen, Heimo Kanerva, Ali Harlin, Minnamari Vippola, Christiane Laine

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Abstract

The progress of the conversion, the yield, the structure and the morphology of the produced carbonaceous materials as a function of time were systematically studied with pyrolysis-GC/FID and FESEM microscope. The conversion of galactoglucomannan, bleached kraft pulp and TEMPO oxidized cellulose nanofibrils followed the reaction route of glucose being slower though with fibrous material, higher molar mass and viscosity. The conversion of kraft lignin was minor following completely different reaction route. Carbonaceous particles of different shape and size were produced with yields between 23 and 73% after 4h with being higher for lignin than carbohydrates. According to the results, potential pulp mill streams represent lignocellulosic resources for generation of carbonaceous materials.
Original languageEnglish
Pages (from-to)236-244
JournalBioresource Technology
Volume212
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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Keywords

  • hydrothermal carbonization
  • pulp mill
  • galactoglucomannan
  • kraft pulp
  • kraft lignin

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