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An approach to the utilisation of CO2 as impregnating agent in steam pretreatment of sugar cane bagasse and leaves for ethanol production.

Ferreira-Leitão, Viridiana; Perrone, Clarissa Cruz; Rodrigues, Joice; Franke, Ana Paula Machado; Macrelli, Stefano LU and Zacchi, Guido LU (2010) In Biotechnology for Biofuels 3(1).
Abstract
ABSTRACT: BACKGROUND: The conditions for steam pretreatment of sugar cane bagasse and leaves were studied using CO2 as an impregnating agent. The following conditions were investigated: time (5 to 15 min) and temperature (190 to 220 degrees C). The pretreatment was assessed in terms of glucose and xylose yields after enzymatic hydrolysis and inhibitor formation (furfural and hydroxymethylfurfural) in the pretreatment. Results from pretreatment using SO2 as impregnating agent was used as reference. RESULTS: For sugar cane bagasse, the highest glucose yield (86.6% of theoretical) was obtained after pretreatment at 205 degrees C for 15 min. For sugar cane leaves the highest glucose yield (97.2% of theoretical) was obtained after pretreatment... (More)
ABSTRACT: BACKGROUND: The conditions for steam pretreatment of sugar cane bagasse and leaves were studied using CO2 as an impregnating agent. The following conditions were investigated: time (5 to 15 min) and temperature (190 to 220 degrees C). The pretreatment was assessed in terms of glucose and xylose yields after enzymatic hydrolysis and inhibitor formation (furfural and hydroxymethylfurfural) in the pretreatment. Results from pretreatment using SO2 as impregnating agent was used as reference. RESULTS: For sugar cane bagasse, the highest glucose yield (86.6% of theoretical) was obtained after pretreatment at 205 degrees C for 15 min. For sugar cane leaves the highest glucose yield (97.2% of theoretical) was obtained after pretreatment at 220 degrees C for 5 min. The reference pretreatment, using impregnation with SO2 and performed at 190 degrees C for 5 min, resulted in an overall glucose yield of 79.7% and 91.9% for bagasse and leaves, respectively. CONCLUSIONS: Comparable pretreatment performance was obtained with CO2 as compared to when SO2 is used, although higher temperature and pressure were needed. The results are encouraging as some characteristics of CO2 are very attractive, such as high availability, low cost, low toxicity, low corrosivity and low occupational risk. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biotechnology for Biofuels
volume
3
issue
1
publisher
BioMed Central
external identifiers
  • wos:000277197500001
  • pmid:20384996
  • scopus:77952252779
ISSN
1754-6834
DOI
10.1186/1754-6834-3-7
language
English
LU publication?
yes
id
0303ecb3-e2b8-45fa-a938-c3fe7a318e79 (old id 1595333)
date added to LUP
2010-05-05 14:38:48
date last changed
2018-05-29 09:19:51
@article{0303ecb3-e2b8-45fa-a938-c3fe7a318e79,
  abstract     = {ABSTRACT: BACKGROUND: The conditions for steam pretreatment of sugar cane bagasse and leaves were studied using CO2 as an impregnating agent. The following conditions were investigated: time (5 to 15 min) and temperature (190 to 220 degrees C). The pretreatment was assessed in terms of glucose and xylose yields after enzymatic hydrolysis and inhibitor formation (furfural and hydroxymethylfurfural) in the pretreatment. Results from pretreatment using SO2 as impregnating agent was used as reference. RESULTS: For sugar cane bagasse, the highest glucose yield (86.6% of theoretical) was obtained after pretreatment at 205 degrees C for 15 min. For sugar cane leaves the highest glucose yield (97.2% of theoretical) was obtained after pretreatment at 220 degrees C for 5 min. The reference pretreatment, using impregnation with SO2 and performed at 190 degrees C for 5 min, resulted in an overall glucose yield of 79.7% and 91.9% for bagasse and leaves, respectively. CONCLUSIONS: Comparable pretreatment performance was obtained with CO2 as compared to when SO2 is used, although higher temperature and pressure were needed. The results are encouraging as some characteristics of CO2 are very attractive, such as high availability, low cost, low toxicity, low corrosivity and low occupational risk.},
  articleno    = {7},
  author       = {Ferreira-Leitão, Viridiana and Perrone, Clarissa Cruz and Rodrigues, Joice and Franke, Ana Paula Machado and Macrelli, Stefano and Zacchi, Guido},
  issn         = {1754-6834},
  language     = {eng},
  number       = {1},
  publisher    = {BioMed Central},
  series       = {Biotechnology for Biofuels},
  title        = {An approach to the utilisation of CO2 as impregnating agent in steam pretreatment of sugar cane bagasse and leaves for ethanol production.},
  url          = {http://dx.doi.org/10.1186/1754-6834-3-7},
  volume       = {3},
  year         = {2010},
}