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Comparison of SO2 and H2SO4 impregnation of softwood prior to steam pretreatment on ethanol production

Tengborg, C; Stenberg, K; Galbe, Mats LU ; Zacchi, Guido LU ; Larsson, S; Palmqvist, E and Hahn-Hägerdal, Bärbel LU (1998) In Applied Biochemistry and Biotechnology 70-2. p.3-15
Abstract
The pretreatment of softwood with sulfuric acid impregnation in the production of ethanol, based on enzymatic hydrolysis, has been investigated. The parameters investigated were: H2SO4 concentration (0.5-4.4% w/w liquid), temperature (180-240 degrees C), and residence time (1-20 minutes). The combined severity (log Ro-pH) was used to combine the parameters into a single reaction ordinate. The highest yields of fermentable sugars, i.e., glucose and mannose, were obtained at a combined severity of 3. At this severity, however, the fermentability declined and the ethanol yield decreased. In a comparison with previous results, SO2 impregnation was found to be preferable, since it resulted in approximately the same sugar yields, but better... (More)
The pretreatment of softwood with sulfuric acid impregnation in the production of ethanol, based on enzymatic hydrolysis, has been investigated. The parameters investigated were: H2SO4 concentration (0.5-4.4% w/w liquid), temperature (180-240 degrees C), and residence time (1-20 minutes). The combined severity (log Ro-pH) was used to combine the parameters into a single reaction ordinate. The highest yields of fermentable sugars, i.e., glucose and mannose, were obtained at a combined severity of 3. At this severity, however, the fermentability declined and the ethanol yield decreased. In a comparison with previous results, SO2 impregnation was found to be preferable, since it resulted in approximately the same sugar yields, but better fermentability. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
keywords
softwood, SO2, H2SO4, steam pretreatment, ethanol production
in
Applied Biochemistry and Biotechnology
volume
70-2
pages
3 - 15
publisher
Humana Press
external identifiers
  • wos:000073769000003
  • scopus:0031826970
ISSN
1559-0291
DOI
10.1007/BF02920119
language
English
LU publication?
yes
id
f47c4e62-7875-4452-957e-fb9c390747ed (old id 3911435)
date added to LUP
2013-06-28 14:13:54
date last changed
2017-07-30 03:52:09
@article{f47c4e62-7875-4452-957e-fb9c390747ed,
  abstract     = {The pretreatment of softwood with sulfuric acid impregnation in the production of ethanol, based on enzymatic hydrolysis, has been investigated. The parameters investigated were: H2SO4 concentration (0.5-4.4% w/w liquid), temperature (180-240 degrees C), and residence time (1-20 minutes). The combined severity (log Ro-pH) was used to combine the parameters into a single reaction ordinate. The highest yields of fermentable sugars, i.e., glucose and mannose, were obtained at a combined severity of 3. At this severity, however, the fermentability declined and the ethanol yield decreased. In a comparison with previous results, SO2 impregnation was found to be preferable, since it resulted in approximately the same sugar yields, but better fermentability.},
  author       = {Tengborg, C and Stenberg, K and Galbe, Mats and Zacchi, Guido and Larsson, S and Palmqvist, E and Hahn-Hägerdal, Bärbel},
  issn         = {1559-0291},
  keyword      = {softwood,SO2,H2SO4,steam pretreatment,ethanol production},
  language     = {eng},
  pages        = {3--15},
  publisher    = {Humana Press},
  series       = {Applied Biochemistry and Biotechnology},
  title        = {Comparison of SO2 and H2SO4 impregnation of softwood prior to steam pretreatment on ethanol production},
  url          = {http://dx.doi.org/10.1007/BF02920119},
  volume       = {70-2},
  year         = {1998},
}