液相反应物起限制性作用的滴流床反应器模型评价

EVALUATION OF A TRICKLE BED REACTOR MODELS FOR A LIQUID LIMITED REACTION

在实验流床反应器内用含２３％Ｃｕ，１７％Ｃｒ的氧化铝催化剂进行过氧化氢的等温分解，以测试不同操作条件下液相反应物转化率对空时的依赖关系。实验证实过氧化氢分解是一个液相反应物起限制性作用的１级反应。模型预测与实验数据的比较表明：除催化剂效率因子以外，必须考虑外部质量传递和催化剂外部不完全润湿的影响。Ｄｕｄｕｋｏｖｉｃ提出的考虑催化剂总效率因子的近似模型完全能够模拟上述２种影响。

The isothermal decomposition of hydrogen peroxide on a CuCr catalyst in a laboratory scale trikle bed reactor was used to test model predictions of the dependence of liquid reactant conversion on space time for different operating conditions. It is assured that the decomposition of hydrogen peroxide is a first order liquid-limited reaction. Comparison of model predictions and experimental data indicates that both external mass transfer effects and incomplete external catalyst wetting need to be accounted for. Dudukovic approximate model for the catalyst effectiveness factor adequately simulates both effects.