The effect of sugar decomposed on the ethanol fermentation and decomposition reactions of sugars
- Authors
- Baek, Sang Woo; Kim, Jun Seok; Park, Yoon Kook; Kim, Young Soo; Oh, Kyeong Keun
- Issue Date
- May-2008
- Publisher
- KOREAN SOC BIOTECHNOLOGY & BIOENGINEERING
- Keywords
- 5-HMF; furfural; alpha-cellulose; acid hydrolysis; sugar decomposition
- Citation
- BIOTECHNOLOGY AND BIOPROCESS ENGINEERING, v.13, no.3, pp.332 - 341
- Journal Title
- BIOTECHNOLOGY AND BIOPROCESS ENGINEERING
- Volume
- 13
- Number
- 3
- Start Page
- 332
- End Page
- 341
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/22752
- DOI
- 10.1007/s12257-007-0161-2
- ISSN
- 1226-8372
- Abstract
- A batch reactor was used to investigate the dilute acid hydrolysis reaction of alpha-cellulose and sugar decomposition reactions. Varying the sulfuric acid concentration from 0.07 to 5.0% for reaction temperatures between 180 and 220 degrees C significantly affected glucose yields, which ranged from about 70% to below 10%. Increasing the reaction temperature enhanced this effect. Similar experimental results were obtained for the decomposition of xylose. For sugar decomposition reactions, less than 0.3 g/L of furfural and 5-hydroxymethylfurfural (5-HMF) were produced from glucose and xylose in the absence of sulfuric acid at 190 degrees C and 15 min of reaction time, but adding a small amount of sulfuric acid (0.5%) dramatically increased the decomposition rate and led to the formation of four undesireable products: formic acid, 5-HMF, acetic acid, and furfural. In both hydrolysis and fermentation reactions formic acid, acetic acid, and 5-HMF severely inhibited ethanol fermentation, while furfural had less of an inhibition effect. (C) KSBB.
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