Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Kinetic Study on the Acid-catalyzed Hydrolysis of Xylan

산 촉매 가수분해에 의한 자이란 분해속도 연구

  • Seo, Young-Jun (Department of Forest Products and Technology (BK21 Program), Chonnam National University) ;
  • Lee, Hong-Joo (Department of Bioenergy Science and Engineering, Chonman National University) ;
  • Lee, Jae-Won (Department of Forest Products and Technology (BK21 Program), Chonnam National University)
  • 서영준 (전남대학교 농업생명과학대학 산림자원학부) ;
  • 이홍주 (전남대학교 농업생명과학대학 바이오에너지공학과) ;
  • 이재원 (전남대학교 농업생명과학대학 산림자원학부)
  • Received : 2012.09.13
  • Accepted : 2012.11.16
  • Published : 2012.11.25
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Abstract

In this study, we investigated the kinetics of acid-catalyzed hydrolysis of xylan over a 60 min at $120^{\circ}C$. Sulfuric, oxalic and maleic acids were used as acid catalyst for hydrolysis. The calculated degradation rate constants ($k_1$) showed a correlation with the acid concentration, meaning that the stronger the acid, the higher the xylan degradation rate. Among sulfuric, oxalic and maleic acid catalyzed hydrolysis, the xylan degradation rate to xylose was highest with sulfuric acid. At equivalent solution pH, acid catalyzed hydrolysis was proportional to $H^+$ concentration. The $k_1$ of dicarboxylic acid such as oxalic and maleic acid was higher than that of sulfuric acid at same pH values during hydrolysis.

본 연구는 산 촉매에 의한 자이란 분해속도를 분석하는 것으로 $120^{\circ}C$에서 60분 동안 가수분해를 수행하여 자이란 분해속도를 조사하였다. 산 촉매로는 황산, 옥살산, 말레산을 사용하였다. 자이란 분해에 관여하는 분해속도상수($k_1$)는 산 농도에 비례하여 증가하였으며 이것은 산 농도가 증가할수록 자이란 가수분해가 빠르게 진행된다는 것을 의미한다. 황산, 옥살산, 말레산 중에서 자이란에서 자이로스로 분해되는 속도는 황산을 촉매로 사용하였을 때 가장 높았다. 하지만 수소농도인 pH를 기준으로 하였을 때, 즉 같은 pH 조건에서 가수분해를 수행하였을 때 자이란에서 자이로스로 분해되는 속도는 옥살산, 말레산과 같은 dicarboxylic acid 촉매에서 황산을 사용하였을 때 보다 높은 분해속도상수를 나타냈다.

Keywords

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