Abstract
The aim of this work is to develop a simplified, though rigorously based thermogravimetric anal. (TG) method to est. intrinsic reactivity parameters (activation energy, E, and pre-exponential factor, A) for the oxidn. in air of engineering carbonaceous materials. To achieve this aim, a modified Coats-Redfern method for analyzing linear curves has been devised. The new method assumes first-order reaction kinetics with respect to carbon, and uses a statistical criterion to est. an 'optimum' heating rate. For the oxidn. in air of a model carbon, an optimum rate of 27 K min-1 was detd., at which E=125.8 kJ mol-1. This is in good agreement with activation energies obtained using established, though more limited model-free or isoconversional methods. [on SciFinder (R)]
| Original language | English |
|---|---|
| Pages (from-to) | 109-113 |
| Number of pages | 5 |
| Journal | Journal of Thermal Analysis and Calorimetry |
| Volume | 80 |
| Issue number | 1 |
| Publication status | Published - 2005 |
Keywords
- Activation energy
- Air
- Carbonaceous materials Role
- Oxidation kinetics
- PRP (Properties)
- PROC (Process)
- RCT (Reactant)
- RACT (Reactant or reagent) (anal. of oxidn. reactivity of carbonaceous materials using thermogravimet
- Oxidation
- Reactivity (anal. of oxidn. reactivity of carbonaceous materials using thermogravimetric anal.)
- PEP (Physical
- oxidn reactivity carbonaceous material thermogravimetric analysis
- CPS (Chemical process)
- engineering or chemical process)