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Formación universitaria

versión On-line ISSN 0718-5006

Resumen

ZULUAGA, Santiago; IBARRA, Harold N.; DOBROSZ-GOMEZ, Izabela  y  GOMEZ, Miguel-Ángel. Fitting of Kinetic Parameters and their Deviations using Matlab (. Form. Univ. [online]. 2018, vol.11, n.6, pp.53-62. ISSN 0718-5006.  http://dx.doi.org/10.4067/S0718-50062018000600053.

The main objective of this work is to teach the application of the least squares method available in the Matlab( software with its nlinfit and lsqcurvefit commands to determine kinetic parameters, their uncertainties and the bands associated with different confidence intervals (95% and 99%). To illustrate the methodology, kinetic experimental data obtained using three advanced oxidation processes, were fitted. Different approaches were used: a single equation of reaction velocity in explicit terms, an equation of reaction velocity in implicit terms and a system of reaction rate equations in implicit terms. For each one, the respective fittings were performed with significant differences between the parameters and the deviations associated with the systems with few experimental data. Consequently, it was shown that the type of proposed model required more experimental values ​​for a good fit or another model that meets the expected logical and phenomenological criteria.

Palabras clave : least squares; non-linear regression; goodness of fit; advanced oxidation processes.

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