物理化学学报 >> 2007, Vol. 23 >> Issue (04): 605-608.doi: 10.3866/PKU.WHXB20070430

研究简报 上一篇    下一篇

二水草酸亚铁热分解反应动力学

唐万军; 陈栋华   

  1. 中南民族大学化学与材料科学学院, 催化材料科学湖北重点实验室, 武汉 430074
  • 收稿日期:2006-10-08 修回日期:2006-11-20 发布日期:2007-04-05
  • 通讯作者: 唐万军 E-mail:tangmailbox@126.com

Thermal Decomposition Kinetics of Ferrous Oxalate Dihydrate

TANG Wan-Jun; CHEN Dong-Hua   

  1. Hubei Key liaboratory for Catalysis and Material Science, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
  • Received:2006-10-08 Revised:2006-11-20 Published:2007-04-05
  • Contact: TANG Wan-Jun E-mail:tangmailbox@126.com

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摘要： 用原位XRD技术和热重法分析了二水草酸亚铁的热分解过程, 并进行了动力学研究. 通过结合主曲线法和统计方法判定了热分解过程的动力学模型函数, 并求算了动力学参数. 在静态自产气氛下, 二水草酸亚铁脱水反应遵循随机成核与核增长模型, 草酸亚铁热分解生成氧化铁遵循相界面控制动力学模型. 结果表明, 该方法可以准确、可靠地判定非等温热分解反应的动力学模型函数,并求算动力学参数.

关键词: 二水草酸亚铁, 热分解动力学, 主曲线法, 原位X射线衍射, 热分析

Abstract: Thermal decomposition of ferrous oxalate dihydrate was investigated using in situ X-ray diffraction (XRD) analysis and thermogravimetry in static self-generated air. The master plots method along with a statistical procedure was employed to determine the kinetic model and kinetic parameters of the decomposition processes. The dehydration of ferrous oxalate dihydrate conformed to nuclei production and nuclei growth model, and the decomposition of ferrous oxalate conformed to phase boundary reaction. The results showed that the method could estimate the kinetic parameters for nonisothermal decomposition reactions accurately and reliably.

Key words: Ferrous oxalate dihydrate, Thermal decomposition kinetics, Master plots method, In situ XRD, Thermal analysis