The mechanism of the spontaneous detonation of ammonium nitrate in reactive grounds
| Autor: | James K. Beattie, Pramith Priyananda, Brian S. Hawkett, Jeff Gore, Chiara Neto, Alex M. Djerdjev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nitrous acid
Hydrotalcite Process Chemistry and Technology Ammonium nitrate Induction period Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pollution Decomposition 0104 chemical sciences chemistry.chemical_compound chemistry Urea Chemical Engineering (miscellaneous) 0210 nano-technology Waste Management and Disposal Chemical decomposition NOx |
| Zdroj: | Journal of Environmental Chemical Engineering. 6:281-288 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2017.12.003 |
| Popis: | The mechanism of the decomposition of ammonium nitrate fuel oil (ANFO) and of ammonium nitrate (AN) emulsions has been investigated. The formation of NO gas bubbles at the end of an induction period was observed, which led to the evolution of brown NO2 gas on contact with air. Inhibition of the decomposition reaction could be achieved by reducing the NO concentration in the gas phase, with inhibitors not in physical contact with the reaction mixture. NO adsorbing clay minerals (hydrotalcite) were effective inhibitors, indicating multiple mechanisms of inhibition. A central role is assigned to nitrous acid (HNO2): sequestering NO prevents its formation, base inhibitors keep it in the non-reactive form of the nitrite ion (pKa of HNO2 ∼ 3), and urea in acidic conditions decomposes it to harmless N2. Our results have implications in industries where NOx emissions can cause significant environmental problems for both aquatic and marine life as well as for human health. |
| Databáze: | OpenAIRE |
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