Response Surface Optimization of Concentrated Sulfuric Acidic Hydrolysis of Poplar Sawdust
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.
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
S. S. Liu et al., "Response Surface Optimization of Concentrated Sulfuric Acidic Hydrolysis of Poplar Sawdust", Advanced Materials Research, Vols. 236-238, pp. 259-263, 2011