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Resumo(s)
With the purpose of testing the recently developed Paired Equivalent Isothermal
Exposures (PETE) method, to determine reaction kinetic parameters under nonisothermal
conditions, continuous pasteurizations were carried out with a nectar of a
tropical fruit [25% of Cupuacu (Theobroma grandiflorum) pulp and 15% of sugar] in
order to estimate the ascorbic acid thermal degradation kinetic parameters.
The experimental ascorbic acid thermal degradation activation energy (96±13kJ/mol)
estimated by the PETE, compared well with the previously determined value
(74±5kJ/mol) for the same product under isothermal conditions. The PETE method is a
reliable, easy and faster method to estimate first order reactions activation energy.
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Contexto Educativo
Citação
VIEIRA, Margarida C.; TEIXEIRA, A. A.; SILVA, Cristina L. M. - Kinetic parameters estimation using the Paired Equivalent Isothermal Exposures (PEIE) Method under non-isothermal heating conditions. In: CHEMPOR 98: International Chemical Engineering Conference, 7th, Lisboa, Portugal, 24-26 Stembro, 1998 - Proceedings of CHEMPOR'98 7th International Chemical Engineering Conference. [S.l. : s.n. , 1998]. 6 p.