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2017 Vol.49, Issue 4 Preview Page
Study of the Precipitation of Silica from Black Liquor of Rice Husk Alkine Digestion

왕겨 알칼리 증해 흑액으로부터 실리카 석출 연구

Hyung Min Kim
,
Dong Sung Kim
,
Yong Joo Sung†
,
Young Seok Park1
,
Yong-Gyo Seo1
김형민
,
김동성
,
성용주 †
,
박영석 1
,
서용교 1
Department of Biobased Materials, College of Agriculture and Life Science, Chungnam National University, Daejeon, 34134
1DAEWON Global System Integration, 235, Gongdan-ro, Waegwan-eup, Chilgok, 39909
충남대학교 농업생명과학대학 환경소재공학과
1(주)대원GSI
†Corresponding author: E-Mail: yosung17@cnu.ac.kr
30 August 2017. pp. 143-149
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Abstract

The effects of the pH conditions on the precipitation of silica in the black liquor of the rice husk alkine digestion were evaluated in this study. KOH and NaOH were applied for the rice husk alkaline digestion, and the black liquors originated from each alkaline digestion were characterized. Four pH conditions (pH 10, 9, 8, and 7) were applied for the precipitation of silica from the black liquor. The black liquor from the KOH digestion showed higher solid contents than that of the NaOH digestion, which resulted in the higher amount of the precipitated solid obtained from the KOH black liquor. The yield of silica was higher at the lower pH condition such as pH 8. However, the non-silica materials were also precipitated from the black liquor and the higher amount of non-silica materials were precipitated at the lower pH condition.

Keywords
Rice husk
silica
precipitation
alkaline digestion
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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 : 49
  • No :4
  • Pages :143-149
  • Received Date : 2017-08-06
  • Revised Date : 2017-08-21
  • Accepted Date : 2017-08-23
  • DOI :https://doi.org/10.7584/JKTAPPI.2017.08.49.4.143
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