Optimization of Poplar Wood Conversion by Sulfuric Acid Hydrolysis
The common pathway, i.e. pretreatment, hydrolysis and fermentation was applied for conversion of lignocellusic biomass into fuel. The hydrolysis efficiency is key factor for this process. Reducing sugar yields of poplar wood hydrolysis using concentrated sulfuric acid conditions were investigated in this paper, and the hydrolysis efficiencies were compared referring to reducing sugar contents in hydrolyzates. GC and X-ray Diffraction (XRD) were used for characterization of hydrolyzates and observation of solid residues, respectively. The results showed the optimal grain size for experiment was 160-200 mesh, which obtained reducing sugar yield of 42.98％. The orthogonal experimental design method was used for factor screening relating to reducing sugar conversion rate, such as sulfuric acid concentration (c), hydrolysis temperature (T), and hydrolysis time (t), and hydrolysis condition was optimized. It was found that reducing sugar content of hydrolyzate was significantly influenced by T. The optimal conditions for concentrated sulfuric acid hydrolysis process were determined as follows: c=50％, T=50℃, t=2h. After concentrated sulfuric acid hydrolysis, the reducing sugar content of hydrolyzate is 43.20mg/mL, glucose content is 26.10 mg/mL, the hydrolysis rate is 43.20％, and the residue crystallinity declined 74.34％.
acidic hydrolysis poplar wood glucose
Shan-shan LIU Yong-jun DENG Shan-ming HAN Qiang WANG Chun LIU Yan-fei YIN
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, Chi State Key Lab of Pulp & Paper Engineering, South China University of Technology, Guangzhou, 510641,C
国际会议
南京
英文
47-53
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）