| Autor: |
Cherop, Peter T., Kiambi, Sammy L., Musonge, Paul |
| Zdroj: |
International Journal of Environment and Waste Management; 2018, Vol. 21 Issue: 2-3 p184-200, 17p |
| Abstrakt: |
The non-isothermal model-free and model-fitting kinetics of co-pyrolysis of tyre crumb (TC) with eucalyptus sawdust (ESD) was investigated in this study. The thermogravimetric analysis (TGA) was conducted at heating rates of 2, 5 and 10°C min–1in nitrogen environment at a temperature ramp of 20-600°C. The data from TGA was employed to determine the activation energies (E) by applying Ozawa-Flynn-Wall (OFW) and Friedman (FR) models, while the pre-exponential factors were determined using the Coats-Redfern (CR) method. The average activation energies obtained were 150.29 kJ/mol and 147.29 kJ/mol using OFW and FR methods respectively. The relationship between E and conversion degree, as evidenced by goodness-of-fit tests, appeared to be of sixth degree polynomial kind. The first, second, and third reaction order mechanisms yielded mean pre-exponential factors of 2.73E+03 min–1, 1.72E+06 min–1and 5.54E+09 min–1respectively. Results indicate that the first order reaction model best describes the co-pyrolysis mechanism. |
| Databáze: |
Supplemental Index |
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