A Simple Data Processing Approach for Drying Kinetics Experiments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Castro, L.M.M.N. (Autor) Outra; Maria Nazaré Pinheiro (Autor) FEUP

Revista

Título: Chemical Engineering Communications

Vol. 203 Nº 2

Páginas: 258-269

ISSN: 0098-6445

Editora: Taylor & Francis

Indexação

ISI Web of Science

Scopus

INSPEC

Outras Informações

DOI: 10.1080/00986445.2014.993468

Abstract (EN): A simple mathematical approach is proposed to be applied to drying kinetics raw data processing. The data collected in a drying experiment of powder cork under constant air drying conditions served as case study to present the methodology. Two functions (linear and third-degree polynomial) were used to fit solid moisture content in the constant drying rate and the falling rate periods. The drying rate curve was obtained by differentiation and the time at which the drying rate period's transition occurs was determined iteratively until virtually continuous functions were achieved. The critical moisture content was easily identified and two falling drying rate periods were detected. The powder cork moisture decrease was also used to test several semiempirical models available in the literature. The Logarithmic, Midilli, and Page Modified I models were the ones that revealed the best correlations performance. When the methodology proposed was applied using these models, the critical moisture content was underpredicted. The effective moisture diffusivity and the activation energy were also obtained for powder cork after the proposed mathematical approach has been applied on the raw data obtained in experiments performed at different air drying temperatures.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12