基于差示扫描量热法的费托蜡非等温结晶动力学
TQ645.93; 以滴熔点为 113、104、92、83、78 和 73℃的 6 种窄馏分费托蜡为研究对象,采用差示扫描量热法(DSC)研究其在不同冷却速率下的非等温结晶过程,应用Jeziorny法和莫志深法对结晶动力学参数进行理论预测,通过Kissinger方程计算非等温结晶活化能.结果表明:不同蜡样品的非等温结晶过程相似,并且结晶过程依赖于冷却速率;所采用的动力学模型与试验数据吻合良好,Avrami指数n平均值在 1～2 之间,说明结晶过程为二次成核,成核后生长形成棒状或纤维状晶体;蜡样品的非等温结晶活化能越小或冷却速率越快,越容易发生结晶....
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| Published in | 中国石油大学学报（自然科学版） Vol. 48; no. 2; pp. 209 - 216 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京低碳清洁能源研究院, 北京 102211
01.04.2024
中国石油大学(北京)化学工程与环境学院, 北京 102249%中国石油大学(北京)机械与储运工程学院, 北京 102249%北京低碳清洁能源研究院, 北京 102211%中国石油大学(北京)化学工程与环境学院, 北京 102249 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1673-5005 |
| DOI | 10.3969/j.issn.1673-5005.2024.02.024 |
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| Abstract | TQ645.93; 以滴熔点为 113、104、92、83、78 和 73℃的 6 种窄馏分费托蜡为研究对象,采用差示扫描量热法(DSC)研究其在不同冷却速率下的非等温结晶过程,应用Jeziorny法和莫志深法对结晶动力学参数进行理论预测,通过Kissinger方程计算非等温结晶活化能.结果表明:不同蜡样品的非等温结晶过程相似,并且结晶过程依赖于冷却速率;所采用的动力学模型与试验数据吻合良好,Avrami指数n平均值在 1～2 之间,说明结晶过程为二次成核,成核后生长形成棒状或纤维状晶体;蜡样品的非等温结晶活化能越小或冷却速率越快,越容易发生结晶. |
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| AbstractList | TQ645.93; 以滴熔点为 113、104、92、83、78 和 73℃的 6 种窄馏分费托蜡为研究对象,采用差示扫描量热法(DSC)研究其在不同冷却速率下的非等温结晶过程,应用Jeziorny法和莫志深法对结晶动力学参数进行理论预测,通过Kissinger方程计算非等温结晶活化能.结果表明:不同蜡样品的非等温结晶过程相似,并且结晶过程依赖于冷却速率;所采用的动力学模型与试验数据吻合良好,Avrami指数n平均值在 1～2 之间,说明结晶过程为二次成核,成核后生长形成棒状或纤维状晶体;蜡样品的非等温结晶活化能越小或冷却速率越快,越容易发生结晶. |
| Abstract_FL | 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. |
| Author | 陈胜利 张帆 张胜振 谢浩东 |
| AuthorAffiliation | 北京低碳清洁能源研究院, 北京 102211;中国石油大学(北京)化学工程与环境学院, 北京 102249%中国石油大学(北京)机械与储运工程学院, 北京 102249%北京低碳清洁能源研究院, 北京 102211%中国石油大学(北京)化学工程与环境学院, 北京 102249 |
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| Author_FL | ZHANG Shengzhen ZHANG Fan XIE Haodong CHEN Shengli |
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| DocumentTitle_FL | Non-isothermal crystallization kinetics of Fischer-Tropsch wax based on differential scanning calorimetry |
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| Keywords | 非等温结晶 结晶动力学 crystallization activation energy Fischer-Tropsch wax 差示扫描量热法 differential scanning calorimetry crystallization kinetics 结晶活化能 费托蜡 non-isothermal crystallization |
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| PublicationTitle | 中国石油大学学报（自然科学版） |
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| Publisher | 北京低碳清洁能源研究院, 北京 102211 中国石油大学(北京)化学工程与环境学院, 北京 102249%中国石油大学(北京)机械与储运工程学院, 北京 102249%北京低碳清洁能源研究院, 北京 102211%中国石油大学(北京)化学工程与环境学院, 北京 102249 |
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| Title | 基于差示扫描量热法的费托蜡非等温结晶动力学 |
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