Thermal decomposition kinetics of magnesite from thermogravimetric data
文献类型：会议论文
| 作者 | Liu, X.W.1; Feng, Y.L.1; Li, H.R.2; Zhang, P.1; Wang, P.1 |
| 出版日期 | 2012 |
| 关键词 | Integral equations - Magnesite - Kinetics - Activation energy - Regression analysis - Thermogravimetric analysis - Reaction kinetics |
| 卷号 | 107 |
| 期号 | 1 |
| DOI | 10.1007/s10973-011-1841-x |
| 页码 | 407-412 |
| 英文摘要 | Thermal decomposition kinetics of magnesite were investigated using non-isothermal TG-DSC technique at heating rate (尾) of 15, 20, 25, 35, and 40 K min-1. The method combined Friedman equation and Kissinger equation was applied to calculate the E and lgA values. A new multiple rate iso-temperature method was used to determine the magnesite thermal decomposition mechanism function, based on the assumption of a series of mechanism functions. The mechanism corresponding to this value of F(a), which with high correlation coefficient (r-squared value) of linear regression analysis and the slope was equal to -1.000, was selected. And the Malek method was also used to further study the magnesite decomposition kinetics. The research results showed that the decomposition of magnesite was controlled by three-dimension diffusion; mechanism function was the anti-Jander equation, the apparent activation energy (E), and the pre-exponential term (A) were 156.12 kJ mol-1 and 105.61 s-1, respectively. The kinetic equation was d伪 dT = 105. 6 1尾( - 18777.9/T){3/2(1 + 伪 ) 2/3 [(1 + 伪)1/3 - 1]- 1}, and the calculated results were in accordance with the experiment. 漏 2011 Akad茅miai Kiad贸, Budapest, Hungary. |
| 项目编号 | Acknowledgements This study was supported by the Natural Science Foundation of China by a grant number 20876160 and National support project by a grant number 2006BAB02A11. |
| 资助机构 | Kluwer Academic Publishers |
| 学科主题 | Thermolysis |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59449]  |
| 作者单位 | 1.Civil and Environmental Engineering School, University of Science and Technology, Beijing 100083, China 2.National Key State Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China |
| 推荐引用方式 GB/T 7714 | Liu, X.W.,Feng, Y.L.,Li, H.R.,et al. Thermal decomposition kinetics of magnesite from thermogravimetric data[C]. 见:. |
入库方式： OAI收割
来源：过程工程研究所
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