描述桉木硫酸盐浆氧脱木素过程动力学的新模型  

A New Kinetics Model of Oxygen Delignification of Fast-growing Eucalyptus Kraft Pulp

作　　者：张春云[1] 胡会超[1] 柴欣生[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《中国造纸》2012年第6期1-4,共4页China Pulp & Paper

基　　金：国家自然科学基金(21076091)资助项目

摘　　要：以桉木硫酸盐浆为原料,考察了氧脱木素温度、氧压、NaOH用量及反应时间对木素脱除程度的影响及残碱的变化规律。研究发现,氧脱木素过程溶液的NaOH浓度与纸浆卡伯值(用于表征纸浆木素含量)的自然对数之间呈线性关系;结合这一关系,建立了引入碱浓动态变化的氧脱木素动力学模型。结果表明,该模型能很好地预测桉木硫酸盐浆在各种工艺条件下的纸浆卡伯值(R2=0.980)。与传统氧脱木素动力学模型相比,该模型在参数量的控制及参数设置的合理性方面更具优势;由于考虑了过程残碱的变化,动力学模型参数的拟合结果更接近理论值。The effects of temperature, oxygen pressure, sodium hydroxide charge and reaction time on oxygen delignification of the fast-growing eucalyptus kraft pulp were investigated. It was found that the concentration of sodium hydroxide during oxygen delignification had a linear relationship with the natural logarithm of kappa number that standing for the residual lignin content in the pulp. Based on the information from the above investigation and observation, a new kinetics model of oxygen delignification was developed. The results showed that the present model could provide a good description for the oxygen delignification of the eucalyptus kraft pulps at different process conditions （R2 = 0. 980）. Compared to the traditional kinetics models of oxygen delignification, the present model minimized the number of kinetics parameters in the mathematical equation, which made the model much simpler and reliable.

关 键 词：氧脱木素 残碱 卡伯值 动力学模型 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]