7-ACA粉体燃爆机制的热动力学研究*

doi:10.16265/j.cnki.issn1003-3033.2017.11.009

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (11): 49-54.doi: 10.16265/j.cnki.issn1003-3033.2017.11.009

7-ACA粉体燃爆机制的热动力学研究^*

解启航, 张金锋^** 教授, 李艳丽, 郑艳敏, 王浩, 柳晓凯

河北科技大学环境科学与工程学院,河北石家庄 050018

收稿日期:2017-08-11 修回日期:2017-09-26 发布日期:2020-10-21
通讯作者: ** 张金锋(1971—),男,河北黄骅人,博士,教授,主要从事工业气体、粉尘燃爆机制及防护技术研究。E-mail:sprjf@126.com。
作者简介:解启航 (1993—),男,河北石家庄人,硕士研究生,研究方向为工业气体及粉尘安全与环保防治技术。E-mail:384177815@qq.com。
基金资助:
河北省自然科学基金资助(E2017208083);河北省科技计划项目(15275409D)。

Thermodynamic study on explosion mechanism of 7-ACA dust

XIE Qihang, ZHANG Jinfeng, LI Yanli, ZHENG Yanmin, WANG Hao, LIU Xiaokai

School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang Hebei 050018, China

Received:2017-08-11 Revised:2017-09-26 Published:2020-10-21

摘要/Abstract

摘要： 7-氨基头孢烷酸(7-ACA)粉体在生产过程中存在燃爆危险性,为探究7-ACA粉体的燃爆机制,开展粉体燃烧特性试验。采用热重分析(TGA)方法研究10、20和30 ℃/min等3种升温速率下,7-ACA粉体燃烧的热动力学过程。结果表明:在升温速率为10 ℃/min下,7-ACA粉体最低着火温度为220 ℃,升温速率越大,最小着火温度越高,最大失重速率对应的温度越高。在整个反应过程中,裂解阶段活化能为7.347 kJ/mol,频率因子为1.4×10⁷,反应为1.5级反应;燃烧阶段活化能为146.99 kJ/mol,频率因子为9.18×10¹¹,反应为2级反应。整个过程热动力学参数值都不高,7-ACA粉体能被较小能量点燃,有燃爆危险。

关键词: 7-氨基头孢烷酸(7-ACA), 燃爆机制, 热动力学, 热重分析(TGA), 热解

Abstract: 7-ACA dust has a risk of explosion in the production process. In order to study the explosion mechanism of 7-ACA dust, experiments were carried out by using TGA method. Heating rates of 10, 20 and 30 ℃/min were used in the experiments. Experiments show that the minimum fire temperature of 7-ACA dust is 220 ℃ at the rate of temperature increase being 10 ℃/min, that the higher the rate of temperature increase is, the higher both the minimum fire temperature and the temperature corresponding to the maximum weight loss rate will be, that for the cracking stage, the activation energy is 7.347 kJ/mol, the pre-exponential factor is 1.4×10⁷ and the reaction is 1.5 a order reaction, that for the combustion stage, the activation energy is 146.99 kJ/mol, the pre-exponential factor is 9.18×10¹¹ and the reaction is a 2 order reaction, and that the values of thermal dynamics parameters are not high for the whole process and 7-ACA dust can be ignited with a small amount of energy and poses a risk of explosion.

Key words: 7-amino-cephalosporanic-acid(7-ACA), explosion mechanism, thermal dynamics, thermogravimetric analysis(TGA), pyrolysiss

中图分类号:

X932

解启航, 张金锋教授, 李艳丽, 郑艳敏, 王浩, 柳晓凯. 7-ACA粉体燃爆机制的热动力学研究^*[J]. 中国安全科学学报, 2017, 27(11): 49-54.

XIE Qihang, ZHANG Jinfeng, LI Yanli, ZHENG Yanmin, WANG Hao, LIU Xiaokai. Thermodynamic study on explosion mechanism of 7-ACA dust[J]. China Safety Science Journal, 2017, 27(11): 49-54.

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7-ACA粉体燃爆机制的热动力学研究^*

Thermodynamic study on explosion mechanism of 7-ACA dust

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