PH_3液相催化氧化净化

Study on Liquid Phase Catalytic Oxidation of PH_3

研究了以Co2+与Cu2+不同配比混合液为催化剂对低浓度PH3液相催化氧化净化的过程.分别考察了Co2+与Cu2+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.实验结果表明,当反应温度低于45℃、混合气含氧量为11%～25%条件下,m(Co2+):m(Cu2+)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,m(Co2+):m(Cu2+)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,m(Co2+):m(Cu2+)为1:1的吸收液较易承受混合气中O含量、PH浓度波动及气体流量变化的影响.

Catalytic oxidation process of low concentration phosphine with mixed solution of cobalt（ Ⅱ ） and cu- prum（ Ⅱ ） as catalyst is studied. The influence of gas flow, 02 concentration, entrance PH3 concentration and temperature on the dephosphorization rate under different proportion of Co^2＋ and Cu^2＋. The result shows that when the reaction temperature is lower than 45℃ and the oxygen content of the mixed gas is 11% -25%, the dephosphorization rate of the absorption solution is higher if m（ Co^2＋ ）： m（Cu^2＋ ） is equal to 3：1 ; when the reac- tion temperature is 45 - 80℃ and the oxygen content in the mixed gas is 25% - 80% , the dephosphorization rate of the absorption solution is higher if m（ Co^2＋ ） ： m（ Cu^2＋） is equal to 1 ： 1 ; when all the other conditions are the same, the absorption solution where m（Co^2＋）： m（Cu^2＋） is equal to 1：1 is more likely to endure the influence of the fluctuation of 02 content and PH3 concentration in the mixed gas as well as the change of gas flow.