Non-isothermal decomposition kinetics of pyridinium nitrate under nitrogen atmosphere
| Autor: | Ivaylo Tankov, Magdalena Mitkova, Dicho Stratiev, Rumyana Yankova |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Analytical chemistry chemistry.chemical_element 02 engineering and technology Activation energy Model-free kinetics 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Decomposition Nitrogen Isothermal process Ionic liquids Iso-conversional method 0104 chemical sciences chemistry.chemical_compound chemistry Nitrate Pyridinium Physical and Theoretical Chemistry 0210 nano-technology Inert gas Instrumentation |
| Zdroj: | Thermochimica Acta. 665:85-91 |
| ISSN: | 0040-6031 |
| DOI: | 10.1016/j.tca.2018.05.016 |
| Popis: | The thermal stability and decomposition kinetics of the ionic liquid pyridinium nitrate was investigated by non-isothermal thermogravimetric analysis in an inert atmosphere (nitrogen). For the kinetic experiments, the thermal behavior of the sample was studied in the temperature interval from 360 up to 600 K at different heating rates (5, 10, 15 and 20 K/min). The kinetic parameters of decomposition including activation energy and pre-exponential factor under nitrogen atmosphere were evaluated by menace of two model-free methods – Friedman and Kissinger-Akahira-Sunose. Depending on the used calculation model, the obtained activation energy and pre-exponential factor values with respect to the degree of sample conversion during the kinetic experiment for method ranged in the intervals of 76.36–112.56 kJ/mol and 1.72×105–1.42×1010 min–1, respectively. Based on the attained kinetic parameter values it was established that the process of pyridinium nitrate decomposition occurred as a first-order reaction. Considering the calculated kinetic parameters, a decomposition mechanism for pyridinium nitrate was proposed. |
| Databáze: | OpenAIRE |
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