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Impact of impregnation time and chip size on sugar yield in pretreatment of softwood for ethanol production.

Monavari, Sanam LU ; Galbe, Mats LU and Zacchi, Guido LU (2009) In Bioresource Technology 100(24). p.6312-6316
Abstract
Efficient pretreatment is necessary to make the wood-to-ethanol process more feasible. In this study, chips of different sizes were impregnated with SO(2) and steam-pretreated. Dilute-acid pretreatment together with subsequent enzymatic hydrolysis resulted in solubilization of between 69% and 73% of the fermentable sugars (glucose and mannose) in the raw material for the combinations of impregnation times and chip sizes investigated. Shorter impregnation times resulted in slightly lower mannose yields for the larger chips, probably due to poor diffusion of the catalyst. Small differences in glucose yield after enzymatic hydrolysis showed that the overall glucose yield was slightly higher for the smaller chips, however, whether the... (More)
Efficient pretreatment is necessary to make the wood-to-ethanol process more feasible. In this study, chips of different sizes were impregnated with SO(2) and steam-pretreated. Dilute-acid pretreatment together with subsequent enzymatic hydrolysis resulted in solubilization of between 69% and 73% of the fermentable sugars (glucose and mannose) in the raw material for the combinations of impregnation times and chip sizes investigated. Shorter impregnation times resulted in slightly lower mannose yields for the larger chips, probably due to poor diffusion of the catalyst. Small differences in glucose yield after enzymatic hydrolysis showed that the overall glucose yield was slightly higher for the smaller chips, however, whether the increased energy demand and cost of size reduction is compensated for by the higher yield, requires techno-economical evaluations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Bioresource Technology
volume
100
issue
24
pages
6312 - 6316
publisher
Elsevier
external identifiers
  • wos:000270147700025
  • pmid:19665888
  • scopus:69049086482
ISSN
1873-2976
DOI
10.1016/j.biortech.2009.06.097
language
English
LU publication?
yes
id
24357ac2-16d7-4198-bee4-d7c1265b915f (old id 1469893)
date added to LUP
2009-09-08 13:51:37
date last changed
2017-09-24 03:52:06
@article{24357ac2-16d7-4198-bee4-d7c1265b915f,
  abstract     = {Efficient pretreatment is necessary to make the wood-to-ethanol process more feasible. In this study, chips of different sizes were impregnated with SO(2) and steam-pretreated. Dilute-acid pretreatment together with subsequent enzymatic hydrolysis resulted in solubilization of between 69% and 73% of the fermentable sugars (glucose and mannose) in the raw material for the combinations of impregnation times and chip sizes investigated. Shorter impregnation times resulted in slightly lower mannose yields for the larger chips, probably due to poor diffusion of the catalyst. Small differences in glucose yield after enzymatic hydrolysis showed that the overall glucose yield was slightly higher for the smaller chips, however, whether the increased energy demand and cost of size reduction is compensated for by the higher yield, requires techno-economical evaluations.},
  author       = {Monavari, Sanam and Galbe, Mats and Zacchi, Guido},
  issn         = {1873-2976},
  language     = {eng},
  number       = {24},
  pages        = {6312--6316},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Impact of impregnation time and chip size on sugar yield in pretreatment of softwood for ethanol production.},
  url          = {http://dx.doi.org/10.1016/j.biortech.2009.06.097},
  volume       = {100},
  year         = {2009},
}