Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid.
Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid.
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DOI：
10.3390/ijms23158743
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发表时间：
2022-08-06
影响因子：
5.6
通讯作者：
Yao, Shuangquan
中科院分区：
文献类型：
--
作者：
Deng, Baojuan;Luo, Yadan;Peng, Meijiao;Li, Tao;Su, Jianwei;Wang, Yang;Xia, Xuelian;Feng, Chengqi;Yao, Shuangquan
有机酸预处理作为一种绿色、高效的组分分离技术，在生物质精制中得到了广泛的研究。特别地，通过对甲苯磺酸（p-TsOH）预处理实现了木质素的有效分离。本研究主要探讨了对甲苯磺酸对蔗渣木质素常压分离的机理。对木质素的分离动力学进行了分析。木质素的分离率与p-TsOH浓度、温度和搅拌速度之间存在非简单的线性关系。在引入传质扩散因子的基础上，建立了木质素分离的缩核模型。得到了总脱木素率的一般模型。结果表明，木质素的分离过程分为两个阶段，快速阶段和慢速阶段。研究结果为p-TsOH预处理有效分离木质素提供了理论依据。
As a green and efficient component separation technology, organic acid pretreatment has been widely studied in biomass refining. In particular, the efficient separation of lignin by p-toluenesulfonic acid (p-TsOH) pretreatment has been achieved. In this study, the mechanism of the atmospheric separation of bagasse lignin with p-TsOH was investigated. The separation kinetics of lignin was analyzed. A non-simple linear relationship was found between the separation yield of lignin and the concentration of p-TsOH, the temperature and the stirring speed. The shrinking nucleus model for the separation of lignin was established based on the introduction of mass transfer and diffusion factors. A general model of the total delignification rate was obtained. The results showed that the process of lignin separation occurred into two phases, i.e., a fast stage and a slow stage. The results provide a theoretical basis for the efficient separation of lignin by p-TsOH pretreatment.
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