旋转薄膜式光催化反应器降解水中有机污染物

A Novel Rotating Falling Slurry Photocatalytic Reactor for Degrading Organic Pollutants

提出了一种强化薄膜浆态反应器的新型反应器——旋转薄膜式光催化反应器(RFFS)。以苯酚为模拟有机污染物,以商品的Degussa P25为光催化剂,首先研究了RFFS反应器的性能,然后与常规的鼓泡式光催化反应器进行了光催化性能比较。实验结果表明,RFFS反应器形成的旋转浆态薄膜扩大了与空气和光源的接触面积,强化了光催化体系的传质,提高了体系中催化剂对光能的利用率,并且能够在较高光催化剂浓度的条件下运行。在苯酚初始浓度为30mg/L,催化剂投加量为3.0g/L,通气气速1.0L/min,浆料循环流量为3.3L/min,光距为10cm的条件下,与传统反应器相比,苯酚的催化反应速率提高了1.6倍。

A bench-scale rotating falling slurry photocatalytic reactor for degrading phenol is introduced, within which TiO2 of Degussa P25 is used as photocatalyst. The experiment on this reactor showed a notable increase of phenol degradation rate compared with conventional bubble slurry photoreactor thanks to the improvement of mass transfer and utilization efficiency of light.