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소량의 수분을 함유한 목재 셀룰로오즈의 산촉매 당화 및 생성당의 향류식 추출

Acid Catalyzed Hydrolysis of Wood Cellulose Containing Small Amount of Water and Counter-Current Extraction of Produced Sugars

HWAHAK KONGHAK, October 1986, 24(5), 351-359(9), NONE
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Abstract

적당한 범위의 황산농도에서 소량의 수분을 함유한 목재 셀룰로오즈의 가수분해 반응은 비가역연속 1차 반응을 만족함을 보여주었으며, 170-190 ℃의 온도범위와 4.4-12.2 % 황산농도하에서 반응속도 파라메타를 구하였다. 반응속도식 결과에 의하면 당생성수율 및 당농도는 반응온도 및 산농도가 증가함에 따라 증가하였으나 그에 따른 반응시간의 감축으로 취급상의 어려움을 가지고 있었다. 온도를 변화시키는 소량의 수분을 함유한 리그노셀룰로오즈(lignocellulose)의 회분식 가수분해 반응은 농축된 글루코오즈 용액을 얻을 수 있었으며, 향류식 추출계를 사용함으로써 농축된 글루코오즈 용액을 희석치 않고서 추출할 수 있었다.
The experimental analysis of hydrolysis of wood cellulose containing small amount of water at moderate sulfuric acid concentration showed that the hydrolysis of wood cellulose could be modeled by consecutive irreversible first order reactions. The kinetic parameters were evaluated covering the conditions of 170 to 190 ℃ and 4.4-12.2 % sulfuric acid. Results showed that the sugar yield and concentration would increase with reaction temperature and acid concentration. Batch hydrolysis of lignocellulose containing small amount of water under varying temperature schemes was found to be efficient in obtaining a concentrated glucose solution, thus potentially reducing the heat input in the subsequent fermentation process. This scheme provided 62 to 64 % yield as well as a glucose concentration of 22 %. The concentrated glucose solution trapped within biomass structure could be extracted without significant dilution using counter-current leaching system.

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