时文中, 李冠峰, 赵永和, 朱国才. 氯化铵氯化氧化镧氧化铈混合物及其动力学[J]. 信阳师范学院学报(自然科学版), 2005, 18(2): 155-158.
引用本文: 时文中, 李冠峰, 赵永和, 朱国才. 氯化铵氯化氧化镧氧化铈混合物及其动力学[J]. 信阳师范学院学报(自然科学版), 2005, 18(2): 155-158.
SHI Wen-zhong, LI Guan-feng, ZHAO Yong-he, ZHU Guo-cai. Chlorinating reaction of the admixture of La_2O_3 and CeO_2 by ammonium chloride and its kinetics[J]. Journal of Xinyang Normal University (Natural Science Edition), 2005, 18(2): 155-158.
Citation: SHI Wen-zhong, LI Guan-feng, ZHAO Yong-he, ZHU Guo-cai. Chlorinating reaction of the admixture of La_2O_3 and CeO_2 by ammonium chloride and its kinetics[J]. Journal of Xinyang Normal University (Natural Science Edition), 2005, 18(2): 155-158.

氯化铵氯化氧化镧氧化铈混合物及其动力学

Chlorinating reaction of the admixture of La_2O_3 and CeO_2 by ammonium chloride and its kinetics

  • 摘要: 研究了氯化铵氯化氧化镧氧化铈混合物的适宜条件及其氯化反应动力学 研究表明:在氯化铵用量为nNH4Cl/n(La2O3+CeO2) =12∶1的物质的量比、氯化焙烧温度 390~400℃、氯化时间 25min的条件下,稀土的氯化率在 80%以上;氧化镧与氧化铈混合物的氯化反应动力学遵从Erofeev方程,氯化反应的表观活化能Ea为 13. 49kJ·mol-1,动力学方程为k=1. 6e-13490 /RT,属于内扩散控制 CeO2 与NH4Cl的反应是混合氧化稀土氯化的控速步骤,反应程度决定混合氧化稀土氯化率的大小 混合氧化稀土的组成与配分,是影响氯化铵氯化氧化稀土氯化率和氯化反应速率的重要因素

     

    Abstract: This article analysize the optimum conditions and response-chlorinating kinetics of chlorinating with ammonium chloride in the admixture of La_2O_3 and CeO_2. On the condition of the following terms:25 min of Chlorinating the admixture of La_2O_3 and CeO_2 ,with ammonium chloride dosage n_(NH_4Cl)/n_((La_2O_3+CeO_2))=12∶1 at 390~400 ℃; the chlorinating ratio of the mixed rare earth oxides reaches 80%.The reaction rate equation followed the Erofeev equation ln-ln(1-α)=lnk+nlnt,and the functional relation ...

     

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