竹浆H2O2漂白动力学研究  

Study of Kinetics of H_2O_2 Bleaching of Bamboo Pulp

作　　者：汤志刚[1] 李明飞[2] 梁芳[3] 樊永明[2] 刘亚康[3] 

机构地区：[1]清华大学化学工程系,北京100084 [2]北京林业大学材料科学与技术学院,北京100083 [3]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国造纸学报》2008年第2期19-22,共4页Transactions of China Pulp and Paper

摘　　要：研究了Milox竹浆H_2O_2漂白中H_2O_2浓度、NaOH浓度和温度对漂白速率的影响,并求解出漂白动力学方程。该动力学方程可表示为dw/dt=kC_(H_2O_2)^(2.18)C_(NaOH)^(0.66)w^(-1.415),速率常数k=7.516×10~5×exp(-2.819×103/T),活化能E=22.44 kJ/mol。该动力学方程表明,适度提高温度可提高漂白速率;H_2O_2浓度的提高对漂白速率的提高比NaOH更为显著;漂白中随着白度提高,漂白速率下降。The effect of the dosage of H2O2, the dosage of NaOH and temperature on the reaction rate in the hydrogen peroxide bleaching of Milox bamboo pulp was studied. The kinetics equation of the bleaching can be expressed as dw/dt = kCH2O2^2.18CNaOH^0.66w^-1.415,the rate constant k=7.516×10^5×exp（-2.819×103/T）,and the active energy is 22.44 kJ/mol, The equation indicates that the reaction rate of bleaching increases with the elevation of the temperature , the increase of the dosage of H2O2 can improve the reaction rate greater than that of NaOH, and the reaction rate decreases with the increase of the brightness.

关 键 词：Milox竹浆 H2O2漂白 动力学 

分 类 号：TS745[轻工技术与工程—制浆造纸工程] TS721.2