| 菱镁矿热分解微分方程的建立 |
| |
| 引用本文： | 刘欣伟,冯雅丽,李浩然.菱镁矿热分解微分方程的建立[J].无机盐工业,2011,43(11):15. |
| |
| 作者姓名： | 刘欣伟 冯雅丽 李浩然 |
| |
| 作者单位： | 1.北京科技大学土木与环境工程学院, 北京 100083;2.中国科学院过程工程研究所生化工程国家重点实验室 |
| |
| 摘 要： | 利用TG-DSC热分析技术，对菱镁矿的热分解过程进行了研究。结果表明，菱镁矿的热分解为一步反应。由Kissinger与Ozawa-Doyle两种方程求得菱镁矿热分解反应的表观活化能和指前因子（lg A）分别为177.14 kJ/mol和7.39 s-1。根据Coats-Redfern方程，用常见的固体热分解机理函数分别进行了多元线性回归，进一步利用Malek法确定了菱镁矿热分解过程属于三维扩散机理D3，并获得了分解过程的微分方程。采用DSC方法测试了碳酸镁的比热容，用最小二乘法拟合曲线，获得其比热容表达式。
|
| 关 键 词： | 菱镁矿 热分解 线性回归 比热容 |
Establishment of differential equations of magnesite thermal decomposition |
| |
| Liu Xinwei,Feng Yali,Li Haoran.Establishment of differential equations of magnesite thermal decomposition[J].Inorganic Chemicals Industry,2011,43(11):15. |
| |
| Authors: | Liu Xinwei Feng Yali Li Haoran |
| |
| Affiliation: | 1.School of Civil and Environmental Engineering,Beijing University of Science and Technology,Beijing 100083,China；
2.National Key Laboratory of Biochemical Engineering，Institute of Process Engineering，Chinese Academy of Sciences |
| |
| Abstract: | Thermal decomposition process of magnesite was investigated by means of TG-DSC.Results showed that magnesite decomposition was in one phase reaction.The apparent activation energy and pre-exponential factor(lg A) were calculated by Kissinger and Ozawa-Doyle equations,and the values of them were 177.14 kJ/mol and 7.39 s-1,respectively.According to Coats-Redfern equation,multiple linear regressions were carried out with common mechanism functions of solid thermal decomposition.Furthermore,it was obtained from... |
| |
| Keywords: | magnesite thermal decomposition linear regression specific heat capacity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《无机盐工业》浏览原始摘要信息 |
|
点击此处可从《无机盐工业》下载全文 |
