Publication: Enrichment of Second Generation Ethanol Concentration Obtained from Napier Grass Pretreated with Sulfuric Acid and Hydrothermal Pretreatment
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Issued Date
2025-01-14
Resource Type
ISSN
25550403
eISSN
22671242
Scopus ID
2-s2.0-85216969859
Journal Title
E3S Web of Conferences
Volume
602
Rights Holder(s)
SCOPUS
Bibliographic Citation
E3S Web of Conferences Vol.602 (2025)
Suggested Citation
Phakeenuya V., Panakkal E.J., Gundupalli M.P., Klinjapo R., Sriariyanun M., Tantayotai P. Enrichment of Second Generation Ethanol Concentration Obtained from Napier Grass Pretreated with Sulfuric Acid and Hydrothermal Pretreatment. E3S Web of Conferences Vol.602 (2025). doi:10.1051/e3sconf/202560202007 Retrieved from: https://hdl.handle.net/20.500.14740/20638
Corresponding Author(s)
Other Contributor(s)
Abstract
Enhancing sugar concentration is crucial for improving ethanol yield in biorefinery processes, enabling more efficient downstream recovery. This study investigates the hydrothermal pretreatment of Napier grass with 2% sulfuric acid to boost sugar recovery and ethanol production by incorporating a concentration step. After pretreatment, the liquid fractions were concentrated two-fold and four-fold through rotary evaporation and freeze-drying, resulting in a significant increase in sugar levels, with a 3.5-fold rise in sugar concentration achieved through rotary evaporation compared to unconcentrated samples. However, ethanol production was limited by elevated levels of inhibitors, such as acetic acid and furfural. The maximum ethanol concentration reached was 2.43%, from a liquid fraction concentrated four-fold. These results highlight the necessity of concentration techniques to improve sugar recovery, while also emphasizing the importance of removing inhibitors to increase ethanol yields and enhance the overall efficiency of biorefining processes.