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Citation: REN Xiao-Ning, LIU Zi-Ru, WANG Xiao-Hong, ZHAO Feng-Qi, XIE Min-Zhao, HENG Shu-Yun. Investigation on the Flash Thermolysis of 3,4-Dinitrofurazan-furoxan by T-Jump/FTIRSpectroscopy[J]. Acta Physico-Chimica Sinica, ;2010, 26(03): 547-551. doi: 10.3866/PKU.WHXB20100236 shu

Investigation on the Flash Thermolysis of 3,4-Dinitrofurazan-furoxan by T-Jump/FTIRSpectroscopy

1.
Xi'an Modern Chemitry Research Institute, Xi'an 710065, P. R. China

Received Date: 20 August 2009
Available Online: 5 January 2010

The fast thermolysis of 3,4-dinitrofurazanfuroxan (DNTF) at 0.1-0.4MPa was investigated by temperature-jump Fourier transform infrared (T-jump/FTIR) spectroscopy. All tests were carried out using a heating rate of 1000 ℃·s-1 at 800 and 1000 ℃. Structures and concentrations of the gaseous products were obtained in situ and in real time by fast scanning FTIR. Results showed that the relative molar concentrations c*of the main gaseous products (CO, CO2, NO and NO2) that were released by the thermolysis of DNTF were related to pressure and temperature. The relative molar concentration ratios of c*NO /c*NO2 changes as the temperature and pressure change. These results reveal that the two competitive reactions of C—NO2 homolysis (to form NO2) and isomerization (to form NO) may occur during the fast thermolysis of DNTF. NO formation from the cracking of furazan or furoxan rings may be limited by pressure. Heterogeneous gas/condensed phase and homogeneous gas phase reactions may occur in the secondary and tertiary class reactions of the fast thermolysis of DNTF because the relative molar concentrations of c*CO and c*CO2 increase and the relative molar concentration ratios of c*CO /c*CO2 decrease with increasing pressure.
- Flash pyrolysis,
- T-jump/FTIR,
- DNTF,
- Pressure
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