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中南大学学报(自然科学版)

Journal of Central South University

第40卷    第2期    总第186期    2009年4月

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文章编号:1672−7207(2009)02−0340−06
PdCl2-CuCl2液相催化氧化净化黄磷尾气中PH3
宁  平1,易玉敏2,瞿广飞1,李军燕3,陈思思1,张仁锋1

(1. 昆明理工大学 环境科学与工程学院,云南 昆明,650093;
2. 云南省建设项目环境审核受理中心,云南 昆明,650034;
3. 云南省化工研究院,云南 昆明,650000
)

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(PdCl2n(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300 mL/L,PH3入口质量浓度为850 mg/m3,催化剂中PdCl2浓度为0.03 mol/L时,在850 min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。

 

关键字: 黄磷尾气;磷化氢;催化氧化;过渡金属离子;净化

Catalytic oxidation PH3 in yellow phosphoric tail gas with
 PdCl2 and CuCl2 solution
NING Ping1, YI Yu-min2, QU Guang-fei1, LI Jun-yan3, CHEN Si-si1, ZHANG Ren-feng1

1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. Yunnan Appraisal Center for Environment and Engineering, Kunming 650034, China;
3. Yunnan Research Institute of Chemistry, Kunming 650093, China

Abstract: 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/m3 and the concentration of PdCl2 is 0.03 mol/L, the purification efficiency of PH3 can reach 100% within 850 min. 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.

 

Key words: yellow phosphorus tail gas; phosphine; catalytic oxidation; transition metal ion; purification

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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