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根据Ⅰ报中提出的反应机理,导出了SO_2在钾钒系和钾钠钒系催化剂上进行氧化反应的动力学模型:用自行研制的TG-1型内循环无梯度反应器进行了SO_2在两种催化剂上的多因子和各种单因子的动力学实验.对选用的十六个具有代表性的模型与本模型用图解、线性最小二乘和加权最小二乘法对实验数据拟合,获得具有较准确参数初值的十个竞争模型,然后用Powell法在相同条件下进行非线性拟合和参数寻优.结果证明,无论在低温区还是高温区均以本动力学模型最佳.通过单因子实验结果分析、参数物理意义鉴别和不同温区全部实验点的残差分析,进一步确证了最佳速度方程是合理的.
According to the reaction mechanism proposed in I report, the kinetic model of SO 2 oxidation on potassium-vanadium and potassium-sodium-vanadium catalysts was derived: SO 2 was oxidized by TG-1 internal circulation gradientless reactor Multi-factor catalyst and a variety of single-factor kinetic experiments on the selection of the sixteen representative models and the model diagram, linear least squares and weighted least squares method to fit the experimental data obtained with Ten competing models with more accurate initial parameters were established and then the nonlinear fitting and parameter optimization were performed under the same conditions using the Powell method.The results show that the kinetic model is the best in both low temperature and high temperature regions.According to the single Factor analysis of the experimental results, identification of the physical meaning of the parameters and analysis of the residuals of all the experimental points in different temperature regions further confirmed that the optimal velocity equation is reasonable.