Analysis of the oxidation reactivity of carbonaceous materials using thermogravimetric analysis

E Sima-Ella, T J Mays

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24 Citations (Scopus)

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 languageEnglish
Pages (from-to)109-113
Number of pages5
JournalJournal of Thermal Analysis and Calorimetry
Volume80
Issue number1
Publication statusPublished - 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)

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