中国石油大学学报（自然科学版）2024，Vol.48Issue(2)：209-216,8.DOI:10.3969/j.issn.1673-5005.2024.02.024
基于差示扫描量热法的费托蜡非等温结晶动力学
Non-isothermal crystallization kinetics of Fischer-Tropsch wax based on differential scanning calorimetry
摘要
Abstract
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 crystalliza-tion 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 a-greement with the experimental data.The average value of Avrami index n is between 1 and 2,indicating that the crystalliza-tion process is secondary nucleation,and the rod or fibrous crystals are formed after nucleation.The smaller the non-isother-mal crystallization activation energy of wax samples or the faster the cooling rates,the more prone to crystallization.关键词
费托蜡/差示扫描量热法/非等温结晶/结晶动力学/结晶活化能Key words
Fischer-Tropsch wax/differential scanning calorimetry/non-isothermal crystallization/crystallization kinetics/crystallization activation energy分类
化学工程引用本文复制引用
谢浩东,张帆,张胜振,陈胜利..基于差示扫描量热法的费托蜡非等温结晶动力学[J].中国石油大学学报（自然科学版）,2024,48(2):209-216,8.基金项目
国家能源投资集团科技创新项目(ST930019SH10,ST930020SH08) （ST930019SH10,ST930020SH08）
