Journal
POLYMERS
Volume 9, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/polym9110599
Keywords
glycerol pretreatment; levoglucosan; fast pyrolysis; lignocellulose
Categories
Funding
- Natural Science Foundation of China and Guangdong Province [51606204, 51376186, 2014A030310322]
- Science and Technology Planning Project of Guangzhou City and Guangdong Province [201707010236, 2017A020216007]
- CAS Key Laboratory of Bio-based Materials [KLBM2016008]
- Guangdong Key Laboratory of New and Renewable Energy Research and Development [Y609jf1001]
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In this manuscript, glycerol was used in corncobs' pretreatment to promote levoglucosan production by fast pyrolysis first and then was further utilized as raw material for chemicals production by microbial fermentation. The effects of glycerol pretreatment temperatures (220-240 degrees C), time (0.5-3 h) and solid-to-liquid ratios (5-20%) were investigated. Due to the accumulation of crystalline cellulose and the removal of minerals, the levoglucosan yield was as high as 35.8% from corncobs pretreated by glycerol at 240 for 3 h with a 5% solid-to-liquid ratio, which was obviously higher than that of the control (2.2%). After glycerol pretreatment, the fermentability of the recovered glycerol remaining in the liquid stream from glycerol pretreatment was evaluated by Klebsiella pneumoniae. The results showed that the recovered glycerol had no inhibitory effect on the growth and metabolism of the microbe, which was a promising substrate for fermentation. The value-added applications of glycerol could reduce the cost of biomass pretreatment. Correspondingly, this manuscript offers a green, sustainable, efficient and economic strategy for an integrated biorefinery process.
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