T<sub>D24</sub> determination for mono-nitration products of toluene

ZHOU Yishan; CHEN Liping; CHEN Wanghua; YANG Ting; ZHANG Caixing; YIN Ruili

doi:10.3969/j.issn.0438-1157.2014.11.024

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T_D24 determination for mono-nitration products of toluene

更新时间：2025-12-10

- T_D24 determination for mono-nitration products of toluene
- CIESC Journal Issue 11, Pages: 4383-4391(2014)
- 作者机构：
  
  南京理工大学化工学院安全工程系,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.11.024
  CLC： 625.61TQ013
- Online First：05 November 2014，
  
  Published：05 November 2014
- 稿件说明：
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ZHOU Yishan, CHEN Liping, CHEN Wanghua, et al. T_D24 determination for mono-nitration products of toluene[J]. CIESC Journal, 2014, (11): 4383-4391. DOI: 10.3969/j.issn.0438-1157.2014.11.024.
DOI：

ZHOU Yishan, CHEN Liping, CHEN Wanghua, et al. T_D24 determination for mono-nitration products of toluene[J]. CIESC Journal, 2014, (11): 4383-4391. DOI: 10.3969/j.issn.0438-1157.2014.11.024. DOI：

摘要

为获取甲苯一段硝化未经碱洗产物(样品1:一硝基甲苯+少量混酸)及碱洗后的纯品产物(样品2:一硝基甲苯)在绝热条件下最大温升速率达到时间为24 h所对应的引发温度TD24

并了解其热分解特性

首先采用差示扫描量热仪(DSC)测试了两种样品不同升温速率下的动态DSC数据

分析获得了样品的机理函数、活化能和指前因子

进而推导出两个样品的TD24分别为(246.1±4.5)℃和(257.9±3.6)℃.然后利用绝热加速度量热仪(ARC)对此进行了实验验证

得到绝热条件下样品1和2的TD24分别为241.5℃和256.4℃.上述结果表明

DSC推导的TD24结果与ARC结果几乎一致.这表明根据动态DSC测试参数推导的TD24具有一定的可靠性

可以作为工程应用的参考;就甲苯一段硝化产物而言

含酸体系的热分解危险性更高.

Abstract

To determine the temperature of sample 1 (toluene mono-nitration crude product: mononitrotoluene with a little mixed acid) and sample 2 (pure mononitrotoluene product

MNT) TD24

at which the required time to reach maximum rate of temperature rise under adiabatic condition is 24 hours

and to obtain the thermal decomposition characteristics of these products

differential scanning calorimeter (DSC) and accelerating rate calorimeter (ARC) were employed to test the thermal behaviors of the two samples. By kinetic analysis for dynamic data obtained by DSC in dynamic mode

the TD24 determined for samples 1 and 2 are (246.1±4.5)℃ and (257.9±3.6)℃

respectively. As a comparison

the values of TD24 for sample 1 and 2

determined by ARC under adiabatic condition

are 241.5℃ and 256.4℃

respectively. Therefore

the TD24 values derived from dynamic data are in good agreement with those by ARC

which means that the results derived from DSC are of large reliability and can be used as a reference for engineering applications. Meanwhile

a comparison for the results of sample 1 and 2 indicates that the thermal hazard of MNT with a little mixed acid is higher than that of pure one.

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TD24 determination for mono-nitration products of toluene

DOI：10.3969/j.issn.0438-1157.2014.11.024

摘要

Abstract

关键词

Keywords

references

T_D24 determination for mono-nitration products of toluene