Infrared thin layer drying of saffron ( Crocus sativus L.) stigmas: Mass transfer parameters and quality assessment

2017 ◽  
Vol 25 (4) ◽  
pp. 426-432 ◽  
Author(s):  
Mehdi Torki-Harchegani ◽  
Davoud Ghanbarian ◽  
Vida Maghsoodi ◽  
Ahmad Moheb
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Quality Assessment ◽  
Crocus Sativus ◽  
Thin Layer Drying ◽  
Transfer Parameters ◽  
Crocus Sativus L

Evaluation of the mass transfer process on thin layer drying of papaya seeds from the perspective of diffusive models

2017 ◽  
Vol 54 (2) ◽  
pp. 463-471
Author(s):  
Guilherme Luiz Dotto ◽  
Lucas Meili ◽  
Eduardo Hiromitsu Tanabe ◽  
Daniel Padoin Chielle ◽  
Marcos Flávio Pinto Moreira
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Transfer Process ◽  
Mass Transfer Process ◽  
Thin Layer Drying ◽  
Papaya Seeds

Influence of Drying Conditions and Mathematical Models on the Thin-Layer Drying of Mushrooms

2014 ◽  
Author(s):  
A. Stegou-Sagia ◽  
D. V. Fragkou
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Mathematical Models ◽  
Drying Methods ◽  
Suitable Model ◽  
Drying Time ◽  
Thin Layer Drying ◽  
Drying Behavior ◽  
Drying Models ◽  
Drying Rates

In the present research, experimental data from several studies about drying behavior of mushrooms have been selected and used to compare different drying methods and different mathematical thin layer drying models to simulate mushroom drying rates. The white button (Agaricus Bisporus), the oyster (Pleurotus Ostreatus) and the milky mushroom slices have been considered for drying in different dryers such as hot air cabinet dryer and fluidized bed dryer with different slice thicknesses, drying air temperatures (45 °C to 90 °C) and drying air velocities (0.2 m/s to 5 m/s). The entire drying process has taken place in the falling rate period, assuming that internal mass transfer occurred by diffusion in mushroom slices. The study shows that the drying air temperature and the drying air velocity have an effect on the moisture removal from mushrooms and also on the drying time. Mathematical models have been proved to be useful for design and analysis of heat and mass transfer during drying processes. All the drying models considered in this study could adequately represent the thin layer drying behavior of mushrooms. Furthermore, as it is obvious, any type of mushrooms has its own most suitable model.

scholarly journals Kinetika Pengeringan Lapisan Tipis Daun Jati Belanda (Thin Layer Drying Kinetics of Guazuma Ulmifolia Leaves)

2021 ◽  
Vol 8 (2) ◽  
pp. 53-62
Author(s):  
Hendri Syah ◽  
Armansyah Halomoan Tambunan ◽  
Edy Hartulistiyoso ◽  
Lamhot Parulian Manalu
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Moisture Diffusivity ◽  
Drying Kinetics ◽  
Coefficient Of Determination ◽  
Convective Mass Transfer ◽  
Thin Layer Drying ◽  
Drying Models ◽  
Guazuma Ulmifolia ◽  
Kinetics Of

The objectives of this study were to determine a suitable thin layer drying model to describe the drying kinetics of Guazuma ulmifolia leaves and determine the mass transfer parameters of Guazuma ulmifolia leaves. The drying of Guazuma ulmifolia leaves was conducted in a laboratory scale dryer with various temperature (40oC, 50oC, and 60oC) and relative humidity (30%, 40%, 50% and 60%). Five drying models, namely, Newton, Henderson and Pabis, Page, Midilli-Kucuk, and Verma et al. were fitted to the drying data. The drying curve of guazuma leaves did not show a constant drying period during the drying period. The models suitability were compared base on coefficient of determination (R2), root square mean errors (RSME), and reduced mean square of deviation (X2). It was found that, among the models evaluated, the Midilli and Kucuk model is the best to describe the drying kinetics of Guazuma ulmifolia leaves. The effective moisture diffusivity was found to be in the range of 10-13 – 10-12 m2/s and the convective mass transfer coefficient was in the range of 10-9 – 10-10 m/s. The activation energy value was found to be 89.21 kJ/mol.

scholarly journals Study of the drying kinetics and calculation of mass transfer properties in hot air drying of Cynara cardunculus

2020 ◽  
Vol 5 (1) ◽  
pp. 740-750
Author(s):  
Raquel P. F. Guiné ◽  
Maria João Lima
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Moisture Diffusion ◽  
Equation Model ◽  
Convective Drying ◽  
Cynara Cardunculus ◽  
Thin Layer Drying ◽  
Transfer Properties

AbstractIn the present work, mass transfer properties of thistle flower (Cynara cardunculus L.) were evaluated for the convective drying carried out at temperatures between 35 and 65°C, with an air flow of 0.5 m/s. The calculations followed two different algorithms, based on mathematical models derived from the thin layer drying equation and Fick’s second law of diffusion. The results obtained indicated that different methodologies resulted in different values of mass transfer properties, which is an alert that care must be taken when choosing which calculation method might be more appropriate in a specific practical application. In all cases, the values of moisture diffusion and mass transfer coefficient were found to increase with increasing operating temperature. The values of diffusivity increased from 2.7866 × 10−9 to 1.4027 × 10−8 m2/s for the thin layer model-based algorithm and from 1.9256 × 10−10 to 1.2033 × 10−9 m2/s for Fick’s equation model. The values of the mass transfer coefficient increased from 8.4335 × 10−8 to 8.4400 × 10−7 m/s and from 5.8277 × 10−9 to 7.2398 × 10−8 m/s, respectively, for the thin layer and Fick’s law-based models.

NMR investigations for a quality assessment of Italian PDO saffron (Crocus sativus L.)

Food Control ◽  
2015 ◽  
Vol 50 ◽  
pp. 342-348 ◽  
Author(s):  
Laura R. Cagliani ◽  
Nicola Culeddu ◽  
Matilde Chessa ◽  
Roberto Consonni
Keyword(s):  
Quality Assessment ◽  
Crocus Sativus ◽  
Crocus Sativus L
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