双外推法研究FeC_2O_4·2H_2O脱水过程的动力学机理  

Study on the Kinetic Mechanism of the Dehydration Process of FeC_2O_4·2H_2O Using Double Extrapolation

作　　者：潘云祥[1] 管翔颖[1] 冯增媛[1] 李秀玉[1] 阎政 

机构地区：[1]天津师范大学化学系,天津300074

出　　处：《物理化学学报》1998年第12期1088-1093,共6页Acta Physico-Chimica Sinica

基　　金：天津市教委重点学科资助

摘　　要：在Coats-Redfern积分式和Ozawa公式的基础上，采用双外推法对FeC_2O_4·2H_2O脱水过程的最可能机理进行了研究．结果表明其脱水过程分两步进行：第一步脱水过程为成核与生长过程，G（α）函数积分式为[-ln（1-α）]1／1.5；第二步脱水过程为二维扩散过程，G（α）式为（1-α）ln（1-α）＋α；同时求得相应的动力学参数．On the basis of the Coats-Redfern's integral equation and Ozawa's equation. the probable mechanism of the dehydration process of FeC2O4 2H2O was investigated using double extrapolation. The dehydration Process includes two steps. The first step is the nuclear producing and growing process(n=1.5), G(a)= [in(1-a)]1/1.5; the second step is a two-dimensional diffusion process, G(a)=(1-a)ln(1-a)+a: the corresponding kinetic parameters were determined.

关 键 词：双外推法 草酸亚铁 二水合物 脱水 动力学 机理 

分 类 号：O614.811[理学—无机化学]