偏钒酸铵热分解机理研究  

Mechanism Research on the Thermal Decomposition of NH_4VO_3

作　　者：王唐林 孙朝晖[1] 鲜勇[1] 尹丹凤[1] 李千文 

机构地区：[1]攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]攀钢集团攀枝花钢钒有限公司,四川攀枝花617062

出　　处：《钢铁钒钛》2015年第5期6-10,共5页Iron Steel Vanadium Titanium

摘　　要：采用DSC、TG热分析方法,对偏钒酸铵的热分解机理进行了研究。分析表明,热分解过程包括4个步骤,前三步吸热反应以及最后一步放热反应。利用Kissinger法以及Kissinger-Crane法对V2O5生成反应动力学参数进行计算,建立反应速率方程。结果表明,偏钒酸铵热分解过程为第三步化学反应控速,反应的活化能为156.60 k J/mol,指前因子为2.43×1014min-1,反应级数为0.94。The mechanism of the thermal decomposition of NH4VO3 was investigated by TG-DSC in this paper. The analysis results indicate that the decomposition process experiences four steps including the initial three endothermic reactions and a last exothermic reaction. The kinetic parameters of the formation of V2O5 were calculated by Kissinger and Kissinger-Crane methods,and the corresponding rate equation was established. The results show that the third chemical reaction is the limiting link during the decomposition of NH4VO3,and the activation energy of the reaction is 156. 60 k J/mol,the frequency factor is 2.43 × 10^14min^-1 and the reaction order is 0. 94.

关 键 词：V2O5 偏钒酸铵 热分解 差热分析 动力学参数 活化能 

分 类 号：TQ113.79[化学工程—无机化工]