响应面法优化酸水解稻秆制木糖的工艺参数  

Optimized conditions for production of xylose by acid-hydrolysis of rice straw based on response surface methodology

作　　者：张军伟[1] 傅大放[1,2] 彭奇均 邓琳[1] 

机构地区：[1]东南大学市政工程系,南京210096 [2]南京市水处理与生态修复工程研究中心,南京210013 [3]江南大学化学与材料工程学院,无锡214122

出　　处：《农业工程学报》2009年第11期253-257,共5页Transactions of the Chinese Society of Agricultural Engineering

摘　　要：为了提高稀硫酸水解稻秆制木糖的收率,采用响应面法对稀硫酸水解稻秆制木糖的关键参数进行了优化研究,建立了木糖收率的二次多项式数学模型,并分析模型的有效性与因子间的交互作用。结果表明,3个因素对木糖收率的影响大小依次为酸浓度(质量分数)>温度>时间;稀硫酸水解稻秆制木糖的最佳工艺参数为:酸质量分数1.52%、温度121℃和时间为56min。在此条件下,木糖的最高收率为78.12%。在最佳工艺条件下得到实验结果与模型预测值很吻合,说明所建立的模型是切实可行的。Response surface methodology （RSM） was adopted to study the key parameters in order to increase the yield of xylose in saccharification of rice straw by dilute sulfuric acid hydrolysis. A second order quadratic equation was established, and the applicability of the model and interaction involved factors on predicting the yield of xylose was verified. The results indicated that the effects order of three factors on the yields of xylose were as follows： acid concentration, temperature and time. The optimal levels for achieving the highest yield of xylose were obtained, including dilute sulfuric acid concentration of 1.53%, temperature of 121℃ and reaction time of 56 min. The yield of xylose reached 78.12% under optimized conditions. Hydrolysis runs were conducted under the optimum condition and the results showed the models fitted well the experimental data and the model was feasible.

关 键 词：水解 秸秆 木糖 工艺参数 响应面法 

分 类 号：X712[环境科学与工程—环境工程]