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다양한 리그노셀룰로오스계 바이오매스의 상압 알카리성-H<sub>2</sub>O<sub>2</sub> 탈리그닌 특성
문지선 ( Ji-sun Mun ),임금태 ( Geum-tae Lim ),문성필 ( Sung-phil Mun ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.2
Delignification with alkaline-H<sub>2</sub>O<sub>2</sub> (AHP) under atmospheric pressure was investigated for effective use of low-value lignocellulosic biomass. Three different lignocellulosic biomass were used for this study, namely, Japanese cedar (Cryptomeria japonica) as softwood, Hyun aspen (Populus alba x glandulosa) as hardwood, and bamboo (Phyllostachys pubescens) as grass. The delignification conditions were pH 11.5, liquor ratio 12.5, max. H<sub>2</sub>O<sub>2</sub> concentration 10%, max. temperature 100℃, and max. time 24 h. For Japanese cedar, the delignification was less than 30% even under the most severe delignification conditions. For Hyun aspen, delignification was more than twice than that of Japanese cedar under the same conditions. However, over 60% delignification was difficult for Hyun aspen. Bamboo was easily delignified and reached about 80% delignification under similar conditions as Japanese cedar and Hyun aspen. The differences in AHP delignification were thought to be largely dependent on structural differences in lignin of each species and the proportion of the lignin condensed units. Consequently, it was found that AHP delignification under atmospheric pressure was more suitable for the delignification of bamboo, a non-wood biomass.
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