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›› 2012, Vol. 12 ›› Issue (2): 227-230.

• 反应与分离 • 上一篇    下一篇

CaCO3与MoO3固相反应机理

朱航宇 李正邦 王堇青 杨海森   

  1. 钢铁研究总院冶金工艺研究所 钢铁研究总院冶金工艺研究所 新冶高科技集团有限公司 钢铁研究总院冶金工艺研究所
  • 收稿日期:2012-01-06 修回日期:2012-02-07 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 朱航宇

Mechanism of Solid State Reaction between CaCO3 and MoO3

ZHU Hang-yu LI Zheng-bang WANG Jin-qing YANG Hai-sen   

  1. Department of Metallurgical Technology, Central Iron and Steel Research Institute Department of Metallurgical Technology, Central Iron and Steel Research Institute New Metallurgy Hi-Tech Group Co., Ltd. Department of Metallurgical Technology, Central Iron and Steel Research Institute
  • Received:2012-01-06 Revised:2012-02-07 Online:2012-04-20 Published:2012-04-20
  • Contact: ZHU Hang-yu

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摘要： 采用非等温热重分析法对CaCO3与MoO3固相反应动力学进行了研究，由热重曲线及转化率分别拟合选取的13种固相反应机理函数，通过Coats-Refern方程分别求得活化能和指前因子，根据动力学参数及线性相关性判定该固相反应机理函数. 结果表明，CaCO3和MoO3于450℃开始反应，且速度较快，反应机理为随机成核随后生长，反应模型的积分形式为g(a)=-ln(1-a)，活化能和指前因子分别为170.2 kJ/mol和1.3×107 s-1.

关键词: 三氧化钼, 合金化, 固相反应, 动力学

Abstract: Solid state reaction between CaCO3 and MoO3 was studied using non-isothermal thermal analysis method. On the basis of TG curve and extent of reaction, the chosen 13 solid reaction mechanism functions were fitted respectively. The Coats-Redfern method used for model fitting and kinetic parameter was calculated by slope and intercept. The results indicate that the reaction between CaCO3 and MoO3 begins at 450℃, its reaction mechanism belongs to random nucleation and growth with integral form g(a)=-ln(1-a), the apparent activation energy is determined to be about 170.2 kJ/mol with pre-exponential factor of about 1.3′107 s-1.

Key words: molybdenum trioxide, alloying, solid reaction, kinetics

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