超声波协同WO_3/ZrO_2固体酸水解蔗渣工艺的优化

Optimal Process of Bagasse Synergistic Hydrolysis with Ultrasonic and WO_3/ZrO_2 Solid Acid

[目的]采用超声波预处理协同固体酸水解蔗渣制备还原糖。[方法]探讨了超声波预处理后水解温度、固体酸用量、水解时间、液固比对水解液中还原糖得率的影响。采用响应面法建立二次回归模型,并对水解工艺进行优化。[结果]当水解温度97.52℃、固体酸用量5.76%、反应时间3.10 h、液固比18∶1时,还原糖的得率可达75.65%,比在相同工艺条件下未经超声波处理的得率提高了21.91%。[结论]超声波预处理能够促进蔗渣的水解。

[Objective] The aim was to study bagasse hydrolyzed with ultrasonic pretreatment and WO3/ZrO2 solid acid to prepare reducing sugar.[Method] The effects of hydrolysis temperature,quality of solid acid,hydrolysis time,and liquid-solid mass ratios on the reducing sugar yield in the hydrolyzate were discussed.A quadratic regression model was founded with response surface methodology,and the process was optimized.[Result] The result showed that the reducing sugar yield was 75.65%,the hydrolysis temperature was 97.52 ℃,quality of solid acid was 5.76%,hydrolysis time was 3.10 h,and liquid-solid mass ratios was 18∶1.The reducing sugar yield increased 21.91% compared with the sample which was not pretreated with ultrasonic microwave at the same condition.[Conclusion] Ultrasonic pretreatment process could promote the hydrolysis of bagasse.