碱度与温度对臭氧降解木质素反应速率的影响

The Effects of Basicity and Temperature on Reaction Rate of Lignin Degraded by Ozone

研究了碱度和温度对臭氧降解木质素反应速率的影响,通过紫外光谱分析,测定木质素降解不同时间后的浓度,绘制了木质素浓度—时间曲线。结果表明,碱度能促进降解反应的进行,但对反应速率影响较小;温度对反应速率影响显著,活化能在60～65kJ.mol-1之间。

The effects of basicity and temperature on reaction rate of lignin degraded by ozone were studied.Through ultraviolet spectroscopy analysis,lignin concentrations at different dagradation time were determined,the curves of lignin concentration-time were determined also.The results showed that,basicity could enhance the degradation reaction,but the effect on the reaction rate was small,temperature affected the reaction rate obviously,and the activation energy of the reaction was 60~65 kJ·mol-1.