Non-isothermal crystallization kinetics of Fischer-Tropsch wax based on differential scanning calorimetry

被引：0
|
作者：
Xie H. [1 ,2 ]
Zhang F. [3 ]
Zhang S. [1 ]
Chen S. [2 ]
机构：
[1] National Institute of Clean-and-Low-Carbon Energy, Beijing
[2] College of Chemical Engineering and Environment in China University of Petroleum(Beijing), Beijing
[3] College of Mechanical and Transportation Engineering in China University of Petroleum(Beijing), Beijing
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2024年 / 48卷 / 02期
关键词：
crystallization activation energy; crystallization kinetics; differential scanning calorimetry; Fischer-Tropsch wax; non-isothermal crystallization;
D O I：
10.3969/j.issn.1673-5005.2024.02.024
中图分类号：
学科分类号：
摘要：
The non-isothermal crystallization process of six narrow fractions Fischer-Tropsch waxes with drop melting points of 113, 104, 92, 83, 78 and 73 ℃ at different cooling rates were studied by differential scanning calorimetry (DSC). The crystallization kinetic parameters were predicted by Jeziorny method and Mo Zhishen method. The non-isothermal crystallization activation energy was calculated by Kissinger equation. The results show that the non-isothermal crystallization process of different wax samples is similar and the crystallization process depends on the cooling rates. The kinetic model is in good agreement with the experimental data. The average value of Avrami index n is between 1 and 2, indicating that the crystallization process is secondary nucleation, and the rod or fibrous crystals are formed after nucleation. The smaller the non-isothermal crystallization activation energy of wax samples or the faster the cooling rates, the more prone to crystallization. © 2024 University of Petroleum, China. All rights reserved.
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页码：209 / 216
页数：7
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