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2021 Vol.53, Issue 1 Preview Page
Changes in the Compositions of Organosolv Micronized Residues by Repeated Dissolution in NaOH/Urea

NaOH/Urea 반복 용해에 따른 유기용매 미세화 시료의 구성 성분 변화

Ji-Ae Ryu1
,
Jung Myoung Lee2†
류지애 1
,
이중명 2†
1Department of Wood Science and Technology, Kyungpook National University
2Major in Wood and Paper Science, School of Forestry, Science and Landscape Architecture & Agricultural Science and Technology Research Institute, Kyungpook National University
1경북대학교 임산공학과, 학생
2경북대학교 산림과학·조경학부 임산공학전공 및 농업과학기술연구소, 교수
†Corresponding author: E-Mail: jmylee@knu.ac.kr (Address: Major in Wood and Paper Science, School of Forestry, Science and Landscape Architecture, Kyungpook National University, Daegu, 41566, Republic of Korea)
28 February 2021. pp. 30-37
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Abstract

Aqueous NaOH/urea solution is an effective solvent capable of dissolving biomass. In this study, the changes in the dissolution yields and chemical compositions of organosolv micronized residues were investigated via carrying out repeated freeze-thaw processes of the materials in NaOH/urea solution. Comparing the dissolution yields, the first dissolution process dissolved to 56.3% of the sample and then the insoluble part of the sample subjected to the second round of freeze-thaw process generated an additional dissolution yield of 14.5%, leading to the overall yield of 70.8% from the feed material. Based on the material balance in the course of the repeated dissolution processes, it was found that the major proportion of the cellulose and hemicellulose in the sample were solubilized in the first dissolution process and that the dissolution of lignin was relatively independent of the repeated dissolution processes.

Keywords
Aqueous NaOH/urea solution
freeze-thaw
organosolv pulp
dissolution yield
material balance
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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 53
  • No :1
  • Pages :30-37
  • Received Date : 2021-02-03
  • Revised Date : 2021-02-16
  • Accepted Date : 2021-02-17
  • DOI :https://doi.org/10.7584/JKTAPPI.2021.02.53.1.30
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