Chemical Engineering Graduate Program, Federal University of São Carlos, Rod. Washington Luís-km 235, CEP: 13565-905 São Carlos, SP, Brazil.
Chemical Engineering Graduate Program, Federal University of São Carlos, Rod. Washington Luís-km 235, CEP: 13565-905 São Carlos, SP, Brazil; Chemical Engineering Department, Federal University of São Carlos, Rod. Washington Luís-km 235, CEP: 13565-905 São Carlos, SP, Brazil.
Bioresour Technol. 2017 Mar;228:176-185. doi: 10.1016/j.biortech.2016.12.087. Epub 2016 Dec 24.
This work presents kinetic models of cellulose and hemicellulose extraction during hydrothermal pretreatment of sugarcane straw. Biomass was treated under conditions of 180, 195, and 210°C, using a solid/liquid ratio of 1:10 (w/v). In this study, cellobiose, glucose, formic acid and hydroxymethylfurfural (from cellulosic fraction) and xylose, arabinose, acetic acid, glucuronic acid and furfural (from hemicellulosic fraction) were taken into account in the kinetic parameters determination. The global search algorithm Simulated Annealing was used to fit the models. At 195°C/15min, 85% of hemicellulose and 21% of cellulose removal was reached. For the confidence regions, it was observed that it can be broad, which is coherent with the fact that the parameters are highly correlated. Kinetic models proposed for both cellulosic and hemicellulosic fractions degradation fitted well to the experimental data.
本工作提出了甘蔗秸秆在水热预处理过程中纤维素和半纤维素提取的动力学模型。在 180、195 和 210°C 下，采用固液比为 1:10（w/v）的条件对生物质进行处理。在本研究中，考虑了在纤维素部分的纤维二糖、葡萄糖、甲酸和羟甲基糠醛（来自纤维素部分）以及在半纤维素部分的木糖、阿拉伯糖、乙酸、葡萄糖醛酸和糠醛（来自半纤维素部分）的动力学参数确定。全局搜索算法模拟退火用于拟合模型。在 195°C/15min 下，达到 85%的半纤维素去除率和 21%的纤维素去除率。置信区间较宽，这与参数高度相关的事实是一致的。针对纤维素和半纤维素部分降解提出的动力学模型与实验数据拟合良好。
