化工学报 ›› 2019, Vol. 70 ›› Issue (1): 417-424.DOI: 10.11949/j.issn.0438-1157.20180556
• 过程安全 • 上一篇
收稿日期:
2018-05-25
修回日期:
2018-10-27
出版日期:
2019-01-05
发布日期:
2019-01-05
通讯作者:
叶树亮
作者简介:
丁炯(1986—),男,博士,讲师,<email>dingjiong@cjlu.edu.cn</email>|叶树亮(1973—),男,博士,教授,<email>itmt_paper@126.com</email>
基金资助:
Jiong DING(),Qi CHEN,Qiyue XU,Suijun YANG,Shuliang YE()
Received:
2018-05-25
Revised:
2018-10-27
Online:
2019-01-05
Published:
2019-01-05
Contact:
Shuliang YE
摘要:
受限于仪器原理,绝热加速量热法数据分析需进行热惯量因子修正。然而,现有的修正方法均违背由反应物比热及炉体温度动态追踪效果变化等引起热惯量因子动态变化的事实,导致动力学参数求取存在偏差。针对上述不足,提出一种基于C80与绝热加速量热数据联用的绝热加速量热热惯量因子修正及动力学计算方法。具体步骤如下:基于Friedman法分析C80数据获取无模型动力学参数,将其代入绝热数据求解反应体系比热容与等效热惯量因子乘积,并在绝热平衡方程中由上述乘积替代恒定热惯量因子及比热实现动力学计算。以过氧化二叔丁基(DTBP)和过氧化氢异丙苯(CHP)为实验对象进行实验验证。结果表明,基于两种量热模式联用的热惯量因子修正方法避免了热惯量动态变化对动力学分析的影响,从而获得更加准确的动力学参数。
中图分类号:
丁炯, 陈琪, 许启跃, 杨遂军, 叶树亮. 融合C80数据的绝热加速量热法热惯量因子修正[J]. 化工学报, 2019, 70(1): 417-424.
Jiong DING, Qi CHEN, Qiyue XU, Suijun YANG, Shuliang YE. ARC thermal inertia correction method based on C80 data merging[J]. CIESC Journal, 2019, 70(1): 417-424.
样品 质量/mg | 扫描速率/ (℃?min-1) | 起始放热 温度/℃ | 峰值 温度/℃ | 反应热/ (J?g-1) |
---|---|---|---|---|
300.5 | 0.2 | 121.3 | 149.6 | 1351.6 |
301.0 | 0.5 | 131.3 | 163.5 | 1311.8 |
300.0 | 1 | 142.9 | 173.2 | 1244.4 |
300.3 | 2 | 155.8 | 185.0 | 1235.9 |
表1 DTBP不同扫描速率C80实验数据
Table1 C80 experiment data of DTBP at different heating rates
样品 质量/mg | 扫描速率/ (℃?min-1) | 起始放热 温度/℃ | 峰值 温度/℃ | 反应热/ (J?g-1) |
---|---|---|---|---|
300.5 | 0.2 | 121.3 | 149.6 | 1351.6 |
301.0 | 0.5 | 131.3 | 163.5 | 1311.8 |
300.0 | 1 | 142.9 | 173.2 | 1244.4 |
300.3 | 2 | 155.8 | 185.0 | 1235.9 |
Method | E/(kJ?mol-1) | lnA/s-1 | n | TD24/℃ | SS |
---|---|---|---|---|---|
ARC | 138.5 | 31.3 | 0.97 | 81.6 | 6.8×10-4 |
ARC+C80 | 152.0 | 37.1 | 1.00 | 72.3 | 3.4×10-4 |
表2 动力学参数计算结果对比
Table 2 Comparison results of kinetic parameters from two methods
Method | E/(kJ?mol-1) | lnA/s-1 | n | TD24/℃ | SS |
---|---|---|---|---|---|
ARC | 138.5 | 31.3 | 0.97 | 81.6 | 6.8×10-4 |
ARC+C80 | 152.0 | 37.1 | 1.00 | 72.3 | 3.4×10-4 |
样品 质量/mg | 扫描速率/ (℃?min-1) | 起始放热 温度/℃ | 峰值 温度/℃ | 反应 放热/(J?g-1) |
---|---|---|---|---|
200.2 | 0.2 | 127.0 | 134.8 | 1637.1 |
200.1 | 0.5 | 141.4 | 153.1 | 1611.3 |
200.0 | 1 | 153.9 | 165.5 | 1572.2 |
200.0 | 2 | 158.2 | 173.7 | 1526.1 |
表3 CHP不同扫描速率C80实验数据
Table 3 C80 experiment data of CHP at different heating rates
样品 质量/mg | 扫描速率/ (℃?min-1) | 起始放热 温度/℃ | 峰值 温度/℃ | 反应 放热/(J?g-1) |
---|---|---|---|---|
200.2 | 0.2 | 127.0 | 134.8 | 1637.1 |
200.1 | 0.5 | 141.4 | 153.1 | 1611.3 |
200.0 | 1 | 153.9 | 165.5 | 1572.2 |
200.0 | 2 | 158.2 | 173.7 | 1526.1 |
Method | E/(kJ?mol-1) | lnA/s-1 | n1 | n2 | z | TD24/℃ | SS |
---|---|---|---|---|---|---|---|
ARC | 128.8 | 30.49 | 0.98 | 0.95 | 0.20 | 71.5 | 5.9×10-5 |
ARC+C80 | 137.7 | 32.50 | 0.70 | 1.00 | 0.15 | 80.9 | 2.7×10-5 |
表4 动力学参数计算结果对比
Table 4 Comparison results of kinetic parameters from two methods
Method | E/(kJ?mol-1) | lnA/s-1 | n1 | n2 | z | TD24/℃ | SS |
---|---|---|---|---|---|---|---|
ARC | 128.8 | 30.49 | 0.98 | 0.95 | 0.20 | 71.5 | 5.9×10-5 |
ARC+C80 | 137.7 | 32.50 | 0.70 | 1.00 | 0.15 | 80.9 | 2.7×10-5 |
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