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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study of the enthalpy-entropy mechanism from water sorption of orange seeds (C. sinensis cv. Brazilian) for the use of agro-industrial residues as a possible source of vegetable oil production

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Author(s):
Daniele Penteado Rosa [1] ; Harvey Alexander Villa-Vélez [2] ; Javier Telis-Romero [3]
Total Authors: 3
Affiliation:
[1] Universidade Estadual Paulista. Departamento de Engenharia e Tecnologia de Alimentos - Brasil
[2] Universidade Estadual Paulista. Departamento de Engenharia e Tecnologia de Alimentos - Brasil
[3] Universidade Estadual Paulista. Departamento de Engenharia e Tecnologia de Alimentos - Brasil
Total Affiliations: 3
Document type: Journal article
Source: FOOD SCIENCE AND TECHNOLOGY; v. 33, p. 95-101, 2013-02-00.
Abstract

Orange seeds are a promising agroindustry-waste which can be implemented in the extraction and production of vegetable oil. The relationship between moisture content and water activity provides useful information for the processing and storage of this waste item. The aim of this study was to determine the mechanism of water sorption enthalpy-entropy of orange seeds (C. sinensis cv. Brazilians) according to the moisture content. Therefore, desorption isotherms were determined at five different temperature (30, 40, 50, 60, and 70 ºC) under a wide range of moisture content (0.005-0.057 kg kg-1 d.b.) and water activity (0.02-0.756). Theoretical and empirical models were used for modeling the desorption isotherms. An analytical solution of the Clausius-Clapeyron equation was proposed to compute the isosteric heat of sorption, the differential entropy, and Gibbs free energy using the Oswin model when the effect of temperature on the hygroscopic equilibrium was considered. (AU)

FAPESP's process: 11/05094-8 - Orange waste: study of kinetics of drying of seeds and influence of temperature on quality of oil
Grantee:Daniele Penteado Rosa
Support Opportunities: Scholarships in Brazil - Master