Kinetics of oxygen delignification of hardwood kraft pulp

被引：0
|
作者：
Valchev, I [1 ]
Valcheva, E [1 ]
Christova, E [1 ]
机构：
[1] Univ Chem Technol & Met, Dept Chem Technol Wood, BU-1756 Sofia, Bulgaria
来源：
CELLULOSE CHEMISTRY AND TECHNOLOGY | 1999年 / 33卷 / 3-4期
关键词：
oxygen delignification; hardwood kraft pulp; topochemical mechanism;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
The effect of the process variables on the kinetics of oxygen delignification are studied. It is found that delignification is most precisely described by the topochemical kinetic equation of Prout-Tompkins in its modified form. The rate equation is derived and activation energy and the preexponential factor are determined. It is established the temperature-time dependence, which can be used for controlling the process of oxygen delignification. It is found that variation of the carbohydrate chain lengths obeys another kinetic mechanism and may be described by a pseudo-zero order equation.
引用
收藏
页码：303 / 310
页数：8
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