| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 봄 (04/25 ~ 04/27, 제주 ICC) |
| 권호 |
18권 1호, p.720 |
| 발표분야 |
에너지 |
| 제목 |
Effect of biological treatment and supercritical liquid treatment on enhancement of kraft lignin degradation |
| 초록 |
Kraft lignin of a very high molecular weight was successfully degraded into oligomers by a novel stepwise treatment of combination of biological treatment with supercritical liquid treatment. Under fixed temperature and pressure, 420◦C and 50 MPa, 20 min reaction time was found to be the optimal time length. After sequential treatment by mutant Pseudomonas fluorescens esterase F162L, almost complete degradation was achieved. The obtained degraded lignin had a high molecular peak with an Mp (peak molecular weight) of about 650 g/mol, which was lower than the Mp (3000 g/mol) of original lignin. By comparing the degraded lignin products to p-coumaric acid (MW = 150 g/mol), it was confirmed that the products were lignin monomers and dimers. New product that was nonexistent in sole supercritical liquid treatment was detected in co-treatment with biological treatment and supercritical liquid treatment. The degraded lignin products were characterized using HPLC, SEC, GC-MS and IR. Combinatorial treatment performed well at accelerating the degradation of kraft lignin. |
| 저자 |
이형래, 이홍식, 이윤우, Romas J. Kazlauskas, 박태현
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| 소속 |
서울대 |
| 키워드 |
Biomass refinery; Kraft lignin; Pseudomonas fluorescens esterase; peracetic acid; supercritical liquid
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| E-Mail |
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| 원문파일 |
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