Sunday, May 4, 2008
1-07
Chemical and physical characterizations of Liriodendron tulipifera on growth periods
Bon-Wook Koo1, Byeong-Cheol Min1, Nahyun Park1, Changdeuk Eom1, Hwanmyeong Yeo1, Keun-Ok Ryu2, and In-Gyu Choi1. (1) Department of Forest Sciences, Seoul National University, Gwanak-ro 599 Daehak-dong Kwanak-gu, Seoul, South Korea, (2) Department of Forest Genetics Resources, Korea Forest Research Institute, 44-3 omokcheon-dong kwonseon-gu, Suwon, Kyoungi, South Korea
In this study, we investigated various chemical and physical characterizations of 2-, 4- and 6-years yellow poplar (Liriodendron tulipifera) to build the fundamental data which are able to enhance the applicable value of L. tulipifera as a resource of biomass.
Holocellulose content was decreased slightly from 77.37 to 75.28% with increasing growth periods, but sufficient amount (more than 75%) of holocellulose content was confirmed in all samples. 6-years L. tulipifera had much acid-insoluble lignin content compared to 2- and 4-years trees. It might be caused by the lignification as it grew. Physical characterizations such as crystallinity and strength on various growth periods were investigated. Crystallinity increased from 32.04 (2-years) to 38.57% (6-years) and bending strength increased largely from 21.29 (4-years) to 74.82% (6-years), too.
The digestibility by enzymatic saccharification and the degradation rate by dilute acid pretreatment were decreased depending on growth periods. The digestibility was decreased from 14.55 (4-years) to 10.18% (6-years) and degradation rate after pretreatment at 200°C for 20min was decreased from 14.68 (2-years) to 8.03% (6-years)
Characterizations of 2-years and 4-years trees were very similar, which 6-years one has shown a difference.
Holocellulose content was decreased slightly from 77.37 to 75.28% with increasing growth periods, but sufficient amount (more than 75%) of holocellulose content was confirmed in all samples. 6-years L. tulipifera had much acid-insoluble lignin content compared to 2- and 4-years trees. It might be caused by the lignification as it grew. Physical characterizations such as crystallinity and strength on various growth periods were investigated. Crystallinity increased from 32.04 (2-years) to 38.57% (6-years) and bending strength increased largely from 21.29 (4-years) to 74.82% (6-years), too.
The digestibility by enzymatic saccharification and the degradation rate by dilute acid pretreatment were decreased depending on growth periods. The digestibility was decreased from 14.55 (4-years) to 10.18% (6-years) and degradation rate after pretreatment at 200°C for 20min was decreased from 14.68 (2-years) to 8.03% (6-years)
Characterizations of 2-years and 4-years trees were very similar, which 6-years one has shown a difference.
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See more of The 30th Symposium on Biotechnology for Fuels and Chemicals (May 4 -- 7, 2008)
See more of General Submissions
See more of The 30th Symposium on Biotechnology for Fuels and Chemicals (May 4 -- 7, 2008)