 Design of hydrothermal and subsequent lime pretreatment for fermentable sugar and bioethanol production from acacia woodIlgyu Lee and Ju-Hyun Yu Renewable Energy, 2021, vol. 174, issue C, 170-177 Abstract: In this study, lime (calcium hydroxide) treatment (LT) was applied as an alkaline pretreatment subsequent to hydrothermal treatment (HT) in terms of fermentable sugar and bioethanol production from acacia wood. To maximize the hydrolysis of cellulose and hemicellulose, the condition of 200 °C for 10 min of HT was selected for subsequent lime treatment. The optimum conditions of LT were established to be a ratio of calcium hydroxide to hydrothermally treated acacia biomass of 12.2%, temperature of 70.9 °C, and reaction time of 23.5 h using a response surface methodology, and the maximum glucose yield by prediction and experiment were determined to be 74.4% and 73.5%, respectively. Further mechanical refining accelerated the access of the enzyme to glucan, resulting in an increase in glucose conversion (80.5%). Although the glucose yield by LT was 21.5% higher than that of HT, the ethanol yield was 33.5% lower due to the negative effect of residual calcium ions on yeast fermentation. Keywords: Acacia; Hydrothermal treatment; Lime treatment; Enzymatic hydrolysis; Fermentable sugar; Bioethanol (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:174:y:2021:i:c:p:170-177 DOI: 10.1016/j.renene.2021.04.064 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
Is your work missing from RePEc? Here is how to contribute.
Questions or problems? Check the EconPapers FAQ or send mail to .
EconPapers is hosted by the
School of Business at Örebro University.