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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김성배
- 발행연도
- 2014
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이 논문의 연구 히스토리 (3)
2014
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Pretreatment of wastepaper using aqueous glycerol and ethylene glycol (EG) was investigated to enhance the enzymatic hydrolysis. Compared to glycerol with EG as a pretreatment solvent, EG is superior to glycerol in delignification, but glycerol is much cheaper than EG.
The effects of five factors (solid/liquid ratio, glycerol concentration, acid concentration, reaction time and temperature) on the dissolution yield, the removal of cellulose, hemicellulose and lignin, and the enzymatic digestibility were examined. The 1/8 of solid/liquid was determined to perform the reaction uniformly, and the 93% of glycerol concentration was found to be a minimum concentration to conduct the reaction under atmospheric pressure. Also, it was found that the acid concentration and reaction time were strongly related to the dissolution yield and the removal of cellulose, hemicellulose and lignin, but moderately to the enzymatic digestibility. At an optimum condition of 150℃, 60 min and 1% acid concentration, 56% and 49% of hemicellulose and lignin, respectively, were removed, while only 4% of cellulose was removed. The enzymatic digestibility at this condition was 86%, meaning that 83% of the glucan present in the initial substrate was converted to glucose.
Then the 70% of glycerol concentration was selected to conduct the reaction under high-pressure. At the condition of 150℃, 60 min and 1.25% acid concentration, 59.6% and 34.4% of hemicellulose and lignin, respectively, were removed, while only 3.5% of cellulose was removed.
The effects of five factors (solid/liquid ratio, glycerol concentration, acid concentration, reaction time and temperature) on the dissolution yield, the removal of cellulose, hemicellulose and lignin, and the enzymatic digestibility were examined. The 1/8 of solid/liquid was determined to perform the reaction uniformly, and the 93% of glycerol concentration was found to be a minimum concentration to conduct the reaction under atmospheric pressure. Also, it was found that the acid concentration and reaction time were strongly related to the dissolution yield and the removal of cellulose, hemicellulose and lignin, but moderately to the enzymatic digestibility. At an optimum condition of 150℃, 60 min and 1% acid concentration, 56% and 49% of hemicellulose and lignin, respectively, were removed, while only 4% of cellulose was removed. The enzymatic digestibility at this condition was 86%, meaning that 83% of the glucan present in the initial substrate was converted to glucose.
Then the 70% of glycerol concentration was selected to conduct the reaction under high-pressure. At the condition of 150℃, 60 min and 1.25% acid concentration, 59.6% and 34.4% of hemicellulose and lignin, respectively, were removed, while only 3.5% of cellulose was removed.
목차
Ⅰ. 서론 1Ⅱ. 이론적 배경 31. 바이오 에탄올 32. 폐지의 활용 63. 종이의 구성 84. 신문지의 구성요소 101) 신문용지 102) 잉크 115. 전처리 방법 121) 물리적 전처리 방법 122) 생물학적 전처리 방법 133) 화학적 전처리 방법 13Ⅲ. 실험 재료 및 방법 171. 재료 172. 전처리 173. 시료의 성분분석 201) 당 성분분석 202) Klason lignin 분석 204. 효소 당화율 측정 21Ⅳ. 실험 결과 및 토의 221. glycerol의 특성 222. 기질/용매 (S/L)비의 결정 243. 대기압 조건에서 EG와 glycerol수용액의 전처리효과 비교 274. 93% glycerol수용액에서 황산농도의 영향 305. 93% glycerol에서 반응시간의 영향 326. 고압조건에서 glycerol 사용 가능성 357. 고압조건에서 반응온도의 영향 378. 고압조건에서 황산농도의 영향 399. 고압조건에서 반응시간의 영향 42Ⅴ. 결론 45Ⅵ. 참고문헌 46
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