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Analysis of the oxidation reactivity of carbonaceous materials using thermogravimetric analysis


Reference:

Sima-Ella, E. and Mays, T. J., 2005. Analysis of the oxidation reactivity of carbonaceous materials using thermogravimetric analysis. Journal of Thermal Analysis and Calorimetry, 80 (1), pp. 109-113.

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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)]

Details

Item Type Articles
CreatorsSima-Ella, E.and Mays, T. J.
Uncontrolled Keywordsactivation 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)
DepartmentsFaculty of Engineering & Design > Chemical Engineering
RefereedYes
StatusPublished
ID Code895

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