Response Surface Optimization of Concentrated Sulfuric Acidic Hydrolysis of Poplar Sawdust

Abstract:

The primary goal of this study was optimized condition for hydrolyzed of papermaking waste (poplar sawdust) as a potential bio-ethanol source by sulfuric acid pretreatment. Based on 2³ factorial design, fifteen operations were performed by varying on T, t and c (T: hydrolysis temperature, t: hydrolysis time and c: sulfuric acid concentration). The components of the hydrolysate and solid fractions were analyzed by GC, X-RD and SEM, respectively. The results showed that optimal condition was T 44.8°C, t 120min and c 60%, and reducing sugar yield of 43.3% can be obtained. Through GC detection, glucose content of 26.10 g/L and xylose content of 9.00 g/L is available in hydrolyzate for fermentation. The residue crystallinity declined 74.34% from XRD analysis, the fiber structure was destroyed completely by acid hydrolysis from SEM photograph.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 259-263
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.259
• Online since: May 2011
• Authors: Shan Shan Liu, Gui Gan Fang, Yong Jun Deng, Shan Ming Han
• Keywords: Acidic Hydrolysis, Poplar Sawdust, Reducing Sugar

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