铷-铯-钒系催化剂上二氧化硫氧化反应本征动力学

Intrinsic kinetics of sulphur dioxide oxidation on Rb-Cs-V catalyst

提出SO2 在铷 铯 钒系催化剂上的氧化反应机理为三步催化反应 ,推导出动力学机理模型 .采用内循环无梯度反应器测定了氧化反应本征动力学数据 ,并分低温区 (380～ 42 0℃ )、高温区 (45 0～ 5 2 0℃ )和全温区 (380～5 2 0℃ )利用Powell法对动力学模型进行了参数估值 .方差分析表明 ,在显著性水平 0 .0 1下 ,三步催化机理模型对380～ 42 0℃的低温区动力学数据拟合最好 ,标准偏差为 0 .1 2 6 .

A three step reaction mechanism of SO 2 oxidation on Rb Cs V low temperature sulphuric acid catalyst promoted by mixture of alkali salts is proposed and a mathematical model equation is concluded. The intrinsic kinetic reaction data are measured in a non gradient reactor and the parameters of the different model equations are calculated with the Powell non linear regression method in low temperature region, high temperature region and total temperature region. The concluded model equation fits the kinetic data in low temperature region (380～420 ℃) very well and the standard deviation is no more than 0.126. [