Fe-Cu混合氧化物催化湿式氧化低浓度磷化氢实验研究

Catalytic wet air oxidation of low concentration phosphine with Fe-Cu mixed oxide

采用催化湿式氧化法对低浓度磷化氢净化进行实验研究,制备铁、铜单体催化剂以及Fe-Cu混合氧化物催化剂和Fe-Cu-Ce混合氧化物催化剂。研究反应温度和气体流量对磷化氢净化效率的影响。实验结果表明:当反应温度为50℃,气体流量为200mL/min,氧气浓度为0.5%～3.0%,磷化氢入口质量浓度为0.8～1.0g/m3时,以Fe-Cu混合氧化物作催化剂,磷化氢的净化效率达到70%;当加入稀土元素铈对催化剂进行改性后,净化效率提高到76%,且催化剂的稳定性增强;当温度较高、气体流速较低时,净化效率较高;低浓度磷化氢可以用催化湿式氧化法来脱除。

Catalytic wet air oxidation of low concentration phosphine（PH3） was investigated, and Fe oxide, Cu oxide, Fe-Cu mixed oxide and Fe-Cu-Ce mixed oxide were used as catalysts. The influence of reaction temperature and gas flow rate on purification efficiency was studied. The results show that the purification efficiency of PH3 reaches 70% using Fe-Cu mixed oxide, when reaction temperature is 50 ℃, gas flow rate is 200 mL/min, oxygen （02） condition is 0.5%-3.0%, the entrance concentration of PH3 is 0.8-1.0 g/m^3; in addition, when Fe-Cu mixed oxide is added with rare-earth cerium, the purification efficiency of PH3 is increased to 76%, and catalyst stability is enhanced. The purification efficiency of PH3 is higher when reaction temperature is higher and gas flow rate is lower. PH3 can be removed by catalytic wet air oxidation.