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Title: Convective drying of mango stone for use as biomass.
Authors: Gómez-de la Cruz, Francisco J.
Palomar-Torres, Amalia
Pérez-Latorre, Francisco J.
Cruz-Peragón, Fernando
Abstract: Mango stone is an interesting biomass by-product with a considerable net calorific value. Mango production has significantly risen in the last few years, meaning that mango waste has increased as well. However, mango stone has a moisture content of about 60% (wet basis) and it is very important to dry the samples for using them in electrical and thermal energy production. In this paper, the main parameters involved in the mass transfer during drying are determined. Drying was carried out in a convective dryer through a set of experiments based on five drying air temperatures (100ºC, 125ºC, 150ºC, 175ºC and 200ºC) and three air velocities (1 m/s, 2 m/s and 3 m/s). Drying times ranged between 2 and 23 hours. The drying rate was calculated from the Gaussian model whose values ranged from 1.5·10-6 to 6.3·10-4 s-1. Effective diffusivity was obtained as an overall parameter in the mass diffusion for each test. These values were found between 0.71·10-9 and 13.6·10-9 m2/s. The activation energy was calculated from the Arrhenius law for each test, made at different air velocities. These values were 36.7, 32.2 and 32.1 kJ/mol for 1, 2 and 3 m/s, respectively. This study provides information for future works on design, optimization and numerical simulation models in convective dryers for standard mango stone pieces according to industrial drying conditions.
Keywords: Mango stone
Waste recovery
Mass transfer
Drying rate
Effective diffusivity
Issue Date: Jun-2023
metadata.dc.description.sponsorship: This work has been conducted with the financial support of the Spanish “Consejería Andaluza de Innovación, Ciencia y Empresa” through the research project AGR-6131 (“Modelado y Control de secadero rotativo de orujo”) as part of the research program “Proyectos de Excelencia de la Junta de Andalucía 2010-2014”. The authors gratefully acknowledge the financial support provided.
Publisher: ELSEVIER
Citation: Gómez-de la Cruz, F. J., Palomar-Torres, A., Pérez-Latorre, F. J., & Cruz-Peragón, F. (2023). Convective drying of mango stone for use as biomass. Environmental Research, 227, 115742.
Appears in Collections:DIMM-Artículos

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