Wall mass and heat transfer rates in a square gas-sparged, mechanically stirred reactor were measured by the electrochemical technique under the effect of various geometrical and hydrodynamic variables. For the 45° impeller, the mass transfer data fit the equation Sh = 0.7Sc^0.33Re^0.2Re_g^0.5 with an average deviation of ±6.9 %. For the 90° impeller, the data fit the equation Sh = 0.95Sc^0.33Re^0.14Re_g^0.53 with an average deviation of ±7.5 %. Gas sparging enhanced the wall mass transfer rates by factors of up to 2.61 and 3 for the 90° and 45° impellers, respectively, with a significant decrease in the total power consumption. The contribution of the present results to the operation of multiphase mechanically agitated vessels in different aspects is outlined.

中文翻译：

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方形机械搅拌气-液-固催化反应器壁的传热传质

在各种几何和流体动力学变量的影响下，通过电化学技术测量方形气体喷射、机械搅拌反应器中的壁传质和传热速率。对于 45° 叶轮，传质数据符合方程Sh = 0.7 Sc ^0.33 Re ^0.2 Re _g ^0.5，平均偏差为 ±6.9 %。对于 90° 叶轮，数据符合方程Sh = 0.95 Sc ^0.33 Re ^0.14 Re _g ^0.53平均偏差为 ±7.5 %。气体喷射使 90° 和 45° 叶轮的壁传质速率分别提高了 2.61 和 3 倍，总功耗显着降低。概述了当前结果对多相机械搅拌容器在不同方面的操作的贡献。