A study on the thermal decomposition temperature (TDT) and critical ambient temperature (CAT) of cotton
| Autor: | Dong Liang, Quanbing Luo, Ting Ren, Jian Zhang, Hao Shen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Thermal decomposition Analytical chemistry 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Mass spectrometric 010406 physical chemistry 0104 chemical sciences Critical Ambient temperature Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 128:1617-1625 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-017-6090-1 |
| Popis: | Cotton is a flammable material and some cottons would decompose or even self-ignite at bad storage and transport conditions. This paper studied the spontaneous combustion of cotton from the aspect of thermal decomposition temperature (TDT) and critical ambient temperature (CAT). From Fourier transform infrared spectroscopy analysis and chromatographic and mass spectrometric analysis, significant thermal decomposition was detected at the temperature of $$210\,^\circ \hbox {C}$$ , which indicated that the TDT of cotton was around $$210\,^\circ \hbox {C}$$ . From TG analysis and small-scale CAT test, activation energy of cotton and CAT of small cotton stack were obtained. Then, CATs of the cotton stacks with different dimensions were calculated based on Frank-Kamenetskii theory. With the dimensions l increased from 0.2 to 3.2 m, the CATs of cotton decreased from 195.0 to $$137.9\,^\circ \hbox {C}$$ . The TDT of cotton was higher than these CATs, and the differences between TDT and CAT of cotton varied from almost 15– $$70\,^\circ \hbox {C}$$ (with the dimensions l increased from 0.2 to 3.2 m). As the experiments and calculation of the CATs were very complicated and time-consuming, the CATs of cotton can be estimated if the TDT was known. The result of this paper was especially meaningful for evaluating the risk of spontaneous combustion of cotton and speculating the reason of cotton fire. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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