Cu(Ⅱ)-Co(Ⅱ)液相催化氧化净化PH_3研究

Research on the Cu(Ⅱ)-Co(Ⅱ) Catalyzed Oxidation of Phosphine in Aqueous Solution

用液相催化氧化法对低浓度PH3的净化进行实验研究,分别考察了Co(Ⅱ)与Cu(Ⅱ)不同配比条件下气体流量、O2浓度、入口PH3浓度、温度等对脱磷率的影响。结果表明:当反应温度低于45℃、混合气含氧量为11%—25%条件下,Co(Ⅱ)∶Cu(Ⅱ)为3∶1的吸收液的脱磷率较高;反应温度为45—80℃,混合气含氧量为25%—80%时,Co(Ⅱ)∶Cu(Ⅱ)为1∶1的吸收液的脱磷率较高;在其他条件均相同的情况下,Co(Ⅱ)∶Cu(Ⅱ)为1∶1的吸收液较易承受混合气中O2含量、PH3浓度波动及气体流量变化的影响。

Catalytic oxidation of low concentration phosphine in aqueous solution was researched. The effect of velocity of flow and temperature, the content of oxygen and phosphine and the ratio of cobalt（ Ⅱ ） and cuprum（ Ⅱ ） was investigated. The experiment results showed that at lower temperature（ 〈 45 ℃ ）, oxygen content of 11%-25 %, the purification effect of the solution （Co（ Ⅱ ） ：Cu（ Ⅱ ） =3： 1 ） was superior; at high temperature（45-80 ℃ ） ,oxygen content of 25 %-80 % , the removal rate of phosphorus in the solution （Co（ Ⅱ ） ： Cu（ Ⅱ ） 1 ： 1） was excellent. When the other conditions were uniform, the solution （Co（ Ⅱ ） ：Cu（ Ⅱ ） - 1：1） can endure the fluctuation of the velocity of flow and the contents of oxygen and phosphine.