Combustion of mixtures containing NaClO4, S and carbon

Hussain, Ghulam; Rees, Gwilym J.

doi:10.1007/bf01905587

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…As for 5AT‐AP, the first exothermic peak was due to the decomposition of AP, while the second and third were mainly attributed to the redox reaction and the pyrolysis of AP [23]. For 5AT‐NaClO 4 , the first exothermic peak may be due to the polymerization reaction of melamine, while the second and third peaks were mainly attributed to the redox reaction and the pyrolysis of NaClO 4 , respectively [24]. With the addition of AN, the exothermic peak is moved forward and enhanced with more heat released, which is due to the oxidation reaction between the decomposition products of AN and 5AT.…”

Section: Resultsmentioning

confidence: 91%

“…Afterwards, the oxidation reaction between pyrolysis products of 5AT and NaClO 4 will lead to the formation of CO 2 , CO, and H 2 O in the temperature range of 400-500 °C. Finally, the last pyrolysis process (450-600 °C) of 5AT-Na-ClO 4 is attributed to the decomposition of pure NaClO 4 with the formation of oxygen [24]. As for AN, during the decomposition process of AN, NH 3 and HNO 3 are generated due to the endothermic proton transfer.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Pyrolysis mechanisms of commonly used oxidizers on the 5‐amino‐1H‐tetrazole

Zheng

Wang

Duo

et al. 2023

Propellants Explo Pyrotec

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As a novel energetic material, 5-Amino-1H-tetrazole (5AT) has a history of proposed applications in the fields of airbags, rocket engines, and new propellants. However, the application of 5AT is limited for its poor combustion stability. Identification of the thermal behaviour and pyrolysis mechanism of 5AT could provide guidance on the control of combustion behaviour, which can be effectively improved by adding oxidizers. In this paper, five kinds of oxidizers (Ammonium perchlorate (AP), Sodium perchlorate (NaClO 4 ), Ammonium nitrate (AN), Manganese oxide (MnO 2 ), and Chromic oxide (Cr 2 O 3 )) are mixed with 5AT for investigating the catalytic effects of multi-type oxidizers on 5AT. Thermal behaviour is analysed by the TG-DSC test and the thermal activation energy is evaluated by Kissinger and Ozawa methods. Moreover, TG-FTIR and TG-MS analyses are used to infer the pyrolysis gas products of 5AT/oxidant. The experimental results indicate that the 5AT-AN has the lowest activation energy, and the degradation process was simplified into one step. The addition of AP, NaClO 4 , and MnO 2 can promote the pyrolysis process of 5AT due to the redox reaction between melamine and the decomposition products of oxidizers, while the catalytic effect of Cr 2 O 3 mainly occurs above 400 °C without the occurrence of oxidation. The catalytic mechanism of Cr 2 O 3 mainly performs on the polyaddition and the ring-opening reaction of N-containing heterocycles. The findings of this work may offer valuable direction for understanding, designing, and using 5AT-based propellants.

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Section: Resultsmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%