Muña叶片干燥(Minthostachys mollis)的数学建模,用于确定扩散系数,焓和吉布斯自由能

IF 2.8 Q2 ENGINEERING, CHEMICAL
Reynaldo J. Silva-Paz, Dante K. Mateo-Mendoza, Amparo Eccoña-Sota
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引用次数: 0

摘要

在秘鲁,有4000多种具有药用价值的植物,包括有助于消化和改善健康的穆尼亚。保存这些植物的方法是干燥。本研究的目的是研究穆尼亚叶片干燥动力学中的扩散系数、焓和吉布斯自由能。对样品进行不同的预处理(不进行预处理,以及通过浸入1%抗坏血酸和在60°C下漂白30 s进行处理),并在三个温度(40、50和60°C)下脱水。使用八个数学模型对干燥动力学进行建模,以表示干燥曲线。通过干燥过程降低了水含量。选择对数模型,因为它显示出最适合代表穆尼亚的干燥动力学。不同处理的活化能值相似(p>0.05)。温度的升高使焓和熵降低,吉布斯自由能随着有效扩散系数的增加而增加。干燥动力学允许确定产品储存的干燥时间和设备设计的热力学性质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mathematical Modelling of Muña Leaf Drying (Minthostachys mollis) for Determination of the Diffusion Coefficient, Enthalpy, and Gibbs Free Energy
In Peru, there are more than four thousand plants with medicinal properties, including muña, which helps digestion and improves health. The way to preserve these plants is drying up. The objective of this research was to investigate the coefficient of diffusion, enthalpy, and Gibbs free energy in the drying kinetics of muña leaves. Different pretreatments were carried out on the samples (without pretreatment, as well as treated by immersion in 1% ascorbic acid and bleaching at 60 °C for 30 s), and they were dehydrated at three temperatures (40, 50, and 60 °C). The drying kinetics were modeled using eight mathematical models to represent the drying curve. The water content was reduced by the drying process. The logarithmic model was selected, as it showed the best fit to represent the drying kinetics of the muña. Activation energy values were similar between treatments (p > 0.05). The increase in temperature decreases the enthalpy and entropy and increases the Gibbs free energy with the effective diffusion coefficient. The drying kinetics allows one to determine the drying time for the storage of the product and the thermodynamic properties for the design of the equipment.
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来源期刊
ChemEngineering
ChemEngineering Engineering-Engineering (all)
CiteScore
4.00
自引率
4.00%
发文量
88
审稿时长
11 weeks
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