Evaluation of semi-empirical and non-linear drying models by Bayesian inference

Ricardo C. de Oliveira, Robson Marcelo Rossi, Marcelino Luis Gimenes, Sueli T. D. de Barros

Resumo


Current analysis investigates thin layer drying experiments on passion fruit seeds. Drying characteristics of passion fruit seeds were examined using ambient air for temperature range between 40 and 65ºC and air flow velocity range between 0.6 and 1.2 m s-1. The semi-empirical models were then fitted to the drying data by Bayesian inference, based on the ratios of the difference between the initial and final moisture contents and equilibrium moisture content. The effective diffusivity varied between 1.70 x 10-10 and 4.68 x 10-10 m2 s-1 with temperature and air flow rate increase. Temperature dependence on the diffusivity coefficient was described by an Arrhenius-type relationship. The activation energy for moisture diffusion was 24.36, 35.24 and 13.86 kJ moL-1 for drying air speeds respectively equal to 0.6, 0.9 and 1.2 m s-1.

 


Palavras-chave


passion fruit seeds; drying; diffusivity; Lewis model

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DOI: http://dx.doi.org/10.4025/actascitechnol.v36i4.12691





ISSN 1806-2563 (impresso) e ISSN 1807-8664 (on-line) e-mail: actatech@uem.br

  

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