Fe_2O_3/沸石催化剂非均相类Fenton湿法脱硝实验研究

Experimental study on wet denitrification through heterogeneous Fenton-like method over Fe_2O_3/zeolite catalyst

为开发一种简单经济的湿法脱硝新工艺,采用浸渍法制备沸石载体负载Fe_2O_3的非均相类Fenton催化剂,并对其进行表征,同时考察了H_2O_2浓度、初始pH、催化剂质量浓度和反应温度对Fe_2O_3/沸石催化剂非均相类Fenton湿法脱硝效率的影响。结果表明,Fe_2O_3/沸石催化剂具有较大的比表面积,载体结构没有改变,活性组分Fe_2O_3均匀分散在载体上; Fe_2O_3/沸石催化剂具有明显的催化活性; H_2O_2浓度、初始p H、催化剂质量浓度和反应温度在最佳条件下,NO的脱除效率达52%;催化剂具有较好的稳定性,循环使用5次依然有48%左右的NO脱除效率。

In order to develop a simple and economical wet denitrification process,zeolite supported Fe2O3,a heterogeneous Fenton-like catalyst,is prepared through impregnation method and is then characterized. Meanwhile,the effects of H2O2 concentration,initial p H,catalyst dosage and reaction temperature on the efficiency of Fe2O3/zeolite catalyst in wet denitrification by heterogeneous Fenton-like method are investigated.The results show that the catalyst has a larger specific surface area,the structure of the carrier remains unchanged,and the active component Fe2O3 disperses evenly on the supporter. The of Fe2O3/zeolite catalyst has obvious catalytic activity. The removal efficiency of NO will reach 52% if H2O2 concentration,initial p H,catalyst dosage and reaction temperature all are set at theie own optimal values.NO removal efficiency is still around 48% after the catalyst has been used for 5 times,representing a good stability.