Citation: YANG Ting, CHEN Li-Ping, CHEN Wang-Hua, ZHANG Cai-Xing, GAO Hai-Su, LU Gui-Bin, ZHOU Yi-Shan. Experimental Method on Rapid Identification of Autocatalysis in Decomposition Reactions[J]. Acta Physico-Chimica Sinica, ;2014, 30(7): 1215-1222. doi: 10.3866/PKU.WHXB201405161 shu

Experimental Method on Rapid Identification of Autocatalysis in Decomposition Reactions

1.
Department of Safety Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China

Received Date: 28 February 2014
Available Online: 16 May 2014
Fund Project:

Many chemical substances will decompose in an autocatalytic manner, and such autocatalytic behavior can be identified through isothermal measurements, such as using differential scanning calorimetry (DSC) and microcalorimetry (C80). However, since it is difficult to predict the appropriate temperature for isothermal testing, it would be helpful to develop a simple and effective experimental method to distinguish autocatalytic decomposition. Based on the results of Roduit et al., a new technique for identifying autocatalysis is described herein, termed the“interruption and re-scanning”method. The decompositions of 2-ethylhexyl nitrate (EHN), 2,4-dinitrotoluene (2,4-DNT), dicumyl peroxide (DCP), and cumyl hydroperoxide (CHP) were assessed using both this new method and isothermal approach. Based on the results, the decompositions of EHN and DCP were found to proceed accord to the“nth order”law, whereas 2,4-DNT and CHP decomposed autocatalytically. We conclude that the interruption and rescanning method can be used to identify the characteristics of autocatalysis both quickly and effectively.
- Decomposition reaction,
- Autocatalysis,
- Rapid identification,
- Differential scanning calorimetry,
- Isothermal calorimetry,
- Method of interruption and re-scanning
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