Thursday, April 15, 2010

CO2 enhancement of sugarcane ethanol yield



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

sugarcane ethanol yield

Biotechnology for Biofuels 2010, 3:7doi:10.1186/1754-6834-3-7


Published: 12 April 2010

Abstract (provisional)

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 220degreesC). 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 205degreesC for 15 min. For sugar cane leaves the highest glucose yield (97.2% of theoretical) was obtained after pretreatment at 220degreesC for 5 min. The reference pretreatment, using impregnation with SO2 and performed at 190degreesC 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.

From: BioMed Central <info@biomedcentral.com
Date: April 15, 2010 12:37:37 AM EDT (CA)


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Research

An approach to the utilisation of CO2 as impregnating agent in steam pretreatment of sugar cane bagasse and leaves for ethanol production
Ferreira-Leitao V, Cruz Perrone C, Esteves J, Machado Franke A, Macrelli S, Zacchi G
Biotechnology for Biofuels 2010, 3:7 (12 April 2010)
[Abstract] [Provisional PDF] [PubMed]

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