Effect of stearates on the thermal oxidation process of paraffin
| Autor: | Bo-biao Li, Song-qi Hu, Bo Kang, Lin-lin Liu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 146:2233-2240 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | Thermal reaction process of paraffin/stearate mixtures was studied by thermogravimetric–differential scanning calorimetry–Fourier transform infrared spectroscopy (TG–DSC–FTIR) simultaneous experiments under argon and oxygen atmospheres, and the thermal reaction kinetics were estimated through the non-isothermal measurements and model-free isoconversional methods. The results show that all stearates except for magnesium stearate have a positive effect on the oxidation of paraffin at lower temperature, but only cobalt stearate plays a positive effect during the whole oxidation process; the oxidation of paraffin/cobalt stearate mixture could be divided into three stages, and cobalt stearate could decrease the oxidation reaction temperature of paraffin obviously concerning the first stage; however, the catalytic effects could not be improved markedly by adding more cobalt stearate; the increase in activation energy (Ea) with the increase of cobalt stearate may be attributed to the adsorption catalysis system of the oxidation process. |
| Databáze: | OpenAIRE |
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