Studies on Effect and Optimizing Condition for Saccharum-Miscanthus Leaves Pretreatment via Acid Hydrolysis

• Main Authors: Shih-WeiChang, 張詩偉
• Other Authors: Wen-Teng Wu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/46817743500795866829

碩士 === 國立成功大學 === 化學工程學系 === 102 === The leaves of Saccharum-Miscanthus, which is a hybrid of sugarcane and miscanthus, provide a good biomaterial due to its high holocellulose contain and production. In the present study, dilute acid hydrolysis process is applied to hydrolyze cellulose and hemicellulose to produce reducing sugars such as glucose and xylose. After process optimization, we obtained that under the condition of 30oC, with the leaf size of 3-5mm soaked in 70wt.% H2SO4 solution for 1hr followed by 5wt.% H2SO4 solution hydrolysis under 121oC, 1.2atm for 1hr, the highest total reducing sugar yield was 0.487g reducing sugar/g raw-material-added. To cost down and make it economic viable, we developed a process that using two-stage pretreatment. In the developed process, Saccharum- Miscanthus leaves were first soaked in 30oC, 4wt.%NaOH solution for 6hr, then soaked in 70oC, 20wt.% H2SO4 for 1hr. The two-stage pretreated leaves could give total reducing sugar yield of 0.402g reducing sugar/g raw-material, followed by 5wt.% H2SO4 hydrolysis at 121oC for 1hr.