摘要
还原糖是生物质资源制备乙醇的中间体。为了证实亚临界水解废纸制备还原糖工艺的可行性,研究了在280～320℃,0.25～10 min内废纸亚临界水解为还原糖的水解动力学,构建了一级反应动力学模型,对废纸水解为还原糖的数据进行了动力学拟合。研究结果表明,废纸水解为还原糖的活化能为90.45 kJ/mol,而还原糖水解为其他物质的活化能为106.53 kJ/mol,前者的活化能低于后者,且前者的水解速率常数高于后者,有利于还原糖的积累,故此工艺可行;在310℃,2 min时,废纸水解为还原糖的得率高达46.32%。
Reducing sugar is the intermediate in the preparation of ethanol from biomass. In order to confirm the feasibility of producing reducing sugar by hydrolyzing waste paper with subcritical water, the hydrolyze kinetics of waste paper was investigated at 280-320 ℃, 0.25-10 min. The firstorder kinetic model was constructed to fit the experimental datas of waste paper to reducing sugar. The result indicated that the activation energies of waste paper to reducing sugar were 90.45 kJ/mol and reducing sugar to others were 106.53 kJ/mol,the activation energies of the former was lower than the latter＇s , and the formerls hydrolysis rate constant was higher than the latter, which can favor the accumulation of reducing sugar. The yield of reducing sugar was up to 46.32% at 310 ℃ ,2 min.
出处
《可再生能源》
CAS
北大核心
2011年第5期79-83,共5页
Renewable Energy Resources
基金
华南理工大学中央高校基本科研业务费专项资金资助(2009ZM0184)
关键词
废纸
亚l临界水
水解
还原糖
动力学
waste paper
suberitical water
hydrolysis
reducing sugar
kinetics
