CaCO_3与MoO_3固相反应机理  

Mechanism of Solid State Reaction between CaCO_3 and MoO_3

作　　者：朱航宇[1] 李正邦[1] 王堇青 杨海森[1] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081 [2]新冶高科技集团有限公司,北京100081

出　　处：《过程工程学报》2012年第2期227-230,共4页The Chinese Journal of Process Engineering

基　　金：江苏省科技成果转化专项资金资助项目(编号:BA2010139)

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(α)=-ln(1-α),活化能和指前因子分别为170.2kJ/mol和1.3×107s-1.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（α）=-ln（1-α）, the apparent activation energy is determined to be about 170.2 kJ/mol with pre-exponential factor of about 1.3×107 s-1.

关 键 词：三氧化钼 合金化 固相反应 动力学 

分 类 号：TF03[冶金工程—冶金物理化学]