Aims and methods in non-isothermal reaction kinetics

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The majority of the works dealing with non-isothermal kinetics assumes only one kinetic differential equation, uses linearization techniques and do not check the fit between the simulated and the experimental data. It is not clear from the literature why we need kinetic evaluations at all in this field. Due to this controversial situation, the author has outlined his views on the aims and methods of the non-isothermal kinetics in this paper. Accordingly, the goal of the kinetic evaluation is to obtain better, more informative results from the experiments. If realistic models are used, numerous unknown parameters have to be determined during the evaluation. Since the most important errors of thermal analysis are not random, the laws of the mathematical statistics do not offer means to find the best set of model parameters. Nevertheless, the simultaneous evaluation of a series of thermoanalytical experiments by the method of least squares aims directly at the description of the sample behavior in a wide range of experimental conditions and helps the determination of a large number of unknown parameters. The outlined considerations are supported by examples from the work of the author and coworkers. As a comparison, a statistical survey is given on those papers that were published in journals specialized for thermal analysis, thermochemistry and pyrolysis in 2006 and contained the term "kinetic" or "kinetics" in their titles.

Original languageEnglish
Pages (from-to)278-288
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume79
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - May 2007

Fingerprint

Reaction kinetics
reaction kinetics
Kinetics
kinetics
evaluation
Thermoanalysis
thermal analysis
Thermochemistry
thermochemistry
linearization
Linearization
pyrolysis
Statistical methods
Pyrolysis
Differential equations
differential equations
Experiments
statistics

Keywords

  • DSC
  • Kinetic evaluation
  • Method of least squares
  • Reaction scheme
  • TGA
  • Thermal analysis
  • Thermogravimetry-mass spectrometry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Physical and Theoretical Chemistry

Cite this

Aims and methods in non-isothermal reaction kinetics. / Várhegyi, G.

In: Journal of Analytical and Applied Pyrolysis, Vol. 79, No. 1-2 SPEC. ISS., 05.2007, p. 278-288.

Research output: Contribution to journalArticle

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