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蔗渣甲酸法木素脱出动力学的研究
Organosolv Pulping of Bagasse with Formic Acid
【摘要】 相对碱法制浆,甲酸法制浆具有反应温度较低、溶剂易回收、污染较小的特点,适用于草类原料制浆。甲酸是一种溶解木素性能较好,自身酸度适合木素溶出的较佳有机溶剂。本研究通过设计序列实验,测定反应黑液中溶出木素,建立蔗渣通过甲酸蒸煮反应脱木素动力学关系。结果表明,在常压、甲酸体积分数90%、液比1:10、蒸煮温度100℃、反应时间80 min的蒸煮条件下,蔗渣纤维被分散成纸浆,并有较好的脱木素效果。其脱木素动力学方程为:D=0.74689×C1.68799×(1-exp(-0.05171t)),该方程可以预测蔗渣纸浆过程的脱木素程度,并控制甲酸制浆的蒸煮过程。
【Abstract】 Organosolv pulping process is an effective method to delignify lignocellulosic materials and produce pulp for paper.Formic acid pulping of bagasse was investigated under an atmospheric pressure condition.Under conditions with 90% (v/v) aqueous formic acid,ratio of liquor to bagasse 10(v/w),pulping temperature 100℃,and pulping time 80min,bagasse pulp could be produced.Meanwhile,a kinetic model for delignification of bagasse during cooking with formic acid was established by statistic method from experimental results,that is D (Delignification)=0.74689×C1.68799×(1-exp(-0.05171t)),which can predict lignin removal during cooking process.
- 【文献出处】 中国造纸学报 ,Transactions of China Pulp and Paper , 编辑部邮箱 ,2008年02期
- 【分类号】TS743
- 【被引频次】6
- 【下载频次】285