碱性水溶液中4Na_2SO_4·2H_2O_2·NaCl的分解动力学

Decomposition Kinetics of 4Na_2SO_4·2H_2O_2·NaCl in Alkaline Aqueous Solution

以低浓度 (30 (wt) % )的双氧水制备了硫酸钠 过氧化氢 氯化钠加合物 ,各组分的含量均接近于理论值 ,其纯度为 99 3% ;在 32 3K和 333K下 ,研究了 4Na2 SO4 ·2H2 O2 ·NaCl于碱性水溶液中的分解动力学。结果表明 ,在不同条件下 ,其分解均为一级反应 ;随着温度和pH的增加 ,其分解速率加快。置信水平为 95 %时k和C0 的联合置信域均为椭圆形且面积较小 ,求得的参数精确度较高 ;优化出的模型能较准确地描述 4Na2 SO4 ·2H2 O2 ·NaCl于碱性水溶液中的分解过程。

The compound adduct sodium sulphate-hydrogen peroxide-sodium chloride was prepared using low concentration (30(wt)%) of hydrogen peroxide,the content of each component is closely to theoretical value, its purity reaches 99.3%. Decomposition kinetics of 4Na 2SO 4·2H 2O 2·NaCl in alkaline aqueous solution were investigated at 323K and 333K. Results illustrated that the decomposition kinetics followed first law at different conditions. Decomposition rates increase as temperature and pH. Two parameters k and C 0 are optimized by using mathematical software MathCAD. The optimum kinetic model can describe accurately the decomposition process of 4Na 2SO 4·2H 2O 2·NaCl in alkaline aqueous solution.