摘要
以自主筛选的PdCl2-CuCl2作为模拟黄磷尾气中PH3液相催化氧化净化催化剂。研究催化剂中PdCl2和CuCl2的不同配比、pH值、氧含量、温度、流速、PH3浓度及催化剂含量对净化效率的影响规律。实验结果表明:催化剂中PdCl2和CuCl2的最佳配比为n(PdCl2):n(CuCl2)=1:10;混合气中氧含量为2%时就可以满足需要;较佳的pH值为1.0;混合气速和入口PH3质量浓度的降低有利于催化剂催化效果的发挥;较佳的反应温度为37℃。当混合气速为300mL/L,PH3入口质量浓度为850mg/m3,催化剂中PdCl2浓度为0.03mol/L时,在850min之内对磷化氢的净化效率都能达到100%。催化剂净化机理为:含有3个氧化还原反应,同时完成PH3的氧化和催化剂的再生;另含2个络合反应,可降低PH3的相间传质阻力。
The solution of PdCl2 and CuCl2 was used as a self-screened catalyst of liquid phase catalytic oxidation to purify phosphine in simulated yellow phosphorus tail gas. The influence laws of different proportion of PdCl2 and CuCl2, pH value, oxygen content, temperature, flow rate, PH3 concentration and catalyst amount on the purification efficiency of PH3 were explored. The results show that the optimal proportion of PdCl2 and CuCl2 is 1：10 and the oxygen content 2% can meet the requirements, the optimal pH and temperature is 1.0 and 37℃, respectively. The decreases of flow rate of gas mixture and mass concentration of PH3 are in favor of the exertion of the catalytic effects. When the flow rate of gas mixture is 300 mL/min, the concentration of PH3 is 850 mg/m^3 and the concentration of PdCl2 is 0.03 mol/L, the purification efficiency of PH3 can reach 100% within 850min. There are three oxidation-reduction reactions that can purify PH3 and regenerate the catalyst, and two complex reaction, which can decrease the mass transfer resistance of interphase.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期340-345,共6页
Journal of Central South University:Science and Technology
基金
高等学校博士学科点专项科研基金资助项目(20050052)
云南省教育厅科研基金资助项目(5Y0553D)
关键词
黄磷尾气
磷化氢
催化氧化
过渡金属离子
净化
yellow phosphorus tail gas
phosphine
catalytic oxidation
transition metal ion
purification
