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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Effects of Flow Pattern on Photodegradation of Phenol and MB with TiO2 Thin Film Immobilized on Ceramic Tube
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Effects of Flow Pattern on Photodegradation of Phenol and MB with TiO2 Thin Film Immobilized on Ceramic Tube

机译：流动方式对固定在陶瓷管上的TiO2薄膜光降解苯酚和MB的影响

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This study focuses on the effects of two flow patterns on photo degradation of organic compounds withTiO2 film immobilized on the inner wall of glazed ceramic tube. Pattern 1 is to pump the solution into the tube from the bottom and overflow from the top. Pattern 2 is to spray the solution on the inner surface and flow from the top to the bottom along the inner wall. Experimental results indicated that the first-order reaction rate constants for photo degradation of phenol with pattern 1 is about 2 times of that with pattern 2 because phenol can be directly degraded easily by UV lights. However, the corresponding degradation rate constants of MB with pattern 2 is about 2to 3 times of that with pattern 1 because MB can not be directly degraded easily by UV lights. In addition, effects of tube radius and extinction coefficient on the reaction constant were also studied. The rate constant will increase with the decrease of extinction coefficient while the tube radius is fixed, and an optimal tube radius for the maximum value of reaction rate constant can be found while extinction coefficient is fixed.
机译：该研究侧重于两种流动模式对固定在釉面陶瓷管内壁上的有机化合物的光降解的影响。图案1是将溶液从底部泵入管中，从顶部溢出。图案2是将溶液喷射在内表面上并从顶部沿着内壁从顶部流到底部。实验结果表明，具有图案1的苯酚的照片降解的一阶反应速率常数为图案2的2倍，因为苯酚可以通过UV光容易地直接降解。然而，具有图案2的MB的相应劣化率常数是图案1的约2至3倍，因为MB不能通过UV灯直接降解。此外，还研究了管半径和消光系数对反应常数的影响。当管半径固定时，速率常数随着消光系数的降低而增加，并且可以在消光系数固定时找到最大反应速率恒定值的最大值的最佳值半径。

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