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Deacetylation followed by fractionation of yellow poplar sawdust for the production of toxicity-reduced hemicellulosic sugar for ethanol Fermentation

Title
Deacetylation followed by fractionation of yellow poplar sawdust for the production of toxicity-reduced hemicellulosic sugar for ethanol Fermentation
Author
KIM, TAE HYUN
Keywords
biomass; deacetylation; pretreatment; xylose; Pichia stipitis; acetic acid
Issue Date
2018-02
Publisher
MDPI AG
Citation
ENERGIES, v. 11, No. 2, Article no. 404
Abstract
In order to produce bioethanol from yellow poplar sawdust without detoxification, deacetylation (mild alkali treatment) was performed with aqueous ammonia solution. To select the optimal conditions, deacetylation was carried out under different conditions: NH4OH loading (2-10% (w/v)) and a solid-to-liquid ratio of 1:4-1:10 at 121 degrees C for 60 min. In order to assess the effectiveness of deacetylation, fractionation of deacetylated yellow poplar sawdust was performed using dilute acid (H2SO4, 0.5-2.0% (w/v)) at a reaction temperature of 130-150 degrees C for 10-80 min. The toxicity-reduced hemicellulosic hydrolyzates that were obtained through a two-step treatment at optimized conditions were fermented using Pichia stipitis for ethanol production, without any further detoxification. The maximum ethanol production was 4.84 g/L, corresponding to a theoretical ethanol yield of 82.52%, which is comparable to those of intentionally made hydrolyzates as controls.
URI
https://www.mdpi.com/1996-1073/11/2/404/htmhttps://repository.hanyang.ac.kr/handle/20.500.11754/80919
ISSN
1996-1073
DOI
10.3390/en11020404
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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