抑制性气氛中菱镁矿分解特性与动力学研究
收稿日期: 2022-11-24
网络出版日期: 2023-10-16
基金资助
国家重点研发计划项目(2022YFF0705100);辽宁省科技厅自然科学基金项目(2020-MS-231)
Study on decomposition characteristic and kinetics of magnesite in inhibitory atmosphere
Received date: 2022-11-24
Online published: 2023-10-16
李希艳 , 张虹 , 刘雪景 , 杨昊 , 徐帅 , 李佳欣 , 解佳祺 , 许光文 . 抑制性气氛中菱镁矿分解特性与动力学研究[J]. 无机盐工业, 2023 , 55(10) : 50 -55 . DOI: 10.19964/j.issn.1006-4990.2022-0696
Decomposition reaction characteristic of magnesite in the inhibitory atmosphere containing product gases was investigated by thermogravimetric analyzer(TGA).The kinetic parameters were calculated based on the Flynn-Wall-Ozawa and Coats-Redfern methods.It was shown that the decomposition of magnesite was seriously inhibited as CO2 concentration increasing.Both the initial decomposition temperature and apparent activation energy were increased logarithmically but the temperature corresponding to the maximum reaction rate was increased exponentially with increasing CO2 concentration.The decomposition of magnesite in the atmosphere with different CO2 concentrations was followed the nucleation and growth control model G(x)=-ln(1-x).This study would provide basic theoretical data for magnesite calcination and resource utilization in actual industry.
Key words: thermogravimetry; magnesite; inhibitory atmosphere; reaction kinetics; decomposition
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