Data/hora: 05/06/2024 08:19:05

Provedor de dados: | 91
País: | Brazil
Título: | Mathematical modeling of the drying of orange bagasse associating the convective method and infrared radiation
Autores: | Sánchez-Sáenz,Carolina M.; Nascimento,Vânia R. G.; Biagi,João D.; Oliveira,Rafael A. de.
Data: | 2015-12-01
Ano: | 2015
Palavras-chave: | Effective diffusivity; Water activity; Fick’s model; Page’s model; Activation energy.
Resumo: | ABSTRACT Mathematical modeling enables dimensioning of dryers, optimization of drying conditions and the evaluation of process performance. The aim of this research was to describe the behavior of orange bagasse drying using Page's and Fick's second law models, and to assess activation energy (using Arrhenius equation), moisture content, water activity and bulk density of product at the end of the process. The drying experimental assays were performed in 2011 with convective air temperature between 36 and 64 ºC and infrared radiation application time in the range from 23 to 277 s in accordance with the experimental central composite rotatable design. Analysis of variance and F-test were applied to results. At the end of the drying process, moisture content was about 0.09 to 0.87 db and water activity was between 0.25 and 0.87. Bulk density did not vary under studied conditions. Empirical Page's model demonstrated better representation of experimental data than the Fick's model for spheres. Activation energy values were about 18.491; 14.975 and 11.421 kJ mol-1 for infrared application times of 60; 150 e 244 s, respectively.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201178
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/1807-1929/agriambi.v19n12p1178-1184
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.19 n.12 2015
Fonte: | info:eu-repo/semantics/openAccess