International Journal of Chemical and Process Engineering Research

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Drying Characteristics and Kinetics of Okra at Different Thickness

Pages: 1-10
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DOI: 10.18488/journal.65.2021.81.1.10

Salome T. Torubeli , Raphael T. Samuel , Rhoda H. Gumus

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[1]          D. I. Onwude, N. Hashima, R. Janiusa, K. Abdana, G. Chen, and A. O. Oladejo, "Non-thermal hybrid drying of fruits and vegetables: A review of current technologies," Innovative Food Science and Emerging Technologies, vol. 43, pp. 223-238, 2017.Available at:

[2]          E. Meisami-asl, S. Rafiee, A. Keyhani, and A. Tabatabaeefar, "Determination of suitable thin layer drying curve model for apple slices (variety-Golab)," Plant Omics, vol. 3, pp. 103-108, 2010.

[3]          S. Tanta and I. Doymaz, "Drying of okra by infrared radiation," Sigma Journal of Engineering and Natural Sciences, vol. 37, pp. 93-104, 2019.

[4]          J. B. Hussein, J. O. Y. Ilesanmi, K. B. Filli, and M. S. Sanusi, "Effects of drying methods on the chemical properties of Okra (Abelmoschus esculentus L. Moench) slices," Current Journal of Applied Science and Technology, vol. 26, pp. 1-10, 2018.Available at:

[5]          J. Audu, S. B. Anyebe, and P. V. Kwaya, "The effect of processing methods on selected physicochemical properties of okra (Abelmoschus  sculentus)," International Journal of Engineering Technology and Computer Research, vol. 3, pp. 118–125, 2015.

[6]          P. Wankhade, R. Sapkal, and V. Sapkal, "Drying characteristics of okra slices on drying in hot air dryer," Procedia Engineering, vol. 51, pp. 371-374, 2013.Available at:

[7]          J. A. V. Famurewa and K. M. Olumofin, "Drying kinetics and influence on the chemical characteristics of dehydrated okra (ABELMOSCHUSESCULENTUS) using cabinet dryer," European Journal of Engineering and Technology, vol. 3, pp. 7-19, 2015.

[8]          F. Fayose and Z. Huan, "Heat pump drying of fruits and vegetables: Principles and potentials for Sub-Saharan Africa," International Journal of Food Science, vol. 2016, p. 9673029, 2016.Available at:

[9]          B. Ringeisen, D. M. Barrett, and P. Stroeve, "Concentrated solar drying of tomatoes," Energy for Sustainable Development, vol. 19, pp. 47-55, 2014.Available at:

[10]        R. H. Gumus and N. Banigo, "Drying characteristics and kinetics of Bitter leave (Vernonia amygdalina) and Scent leave (Ocimum gratissimum)," Chemical and process Engineering Research, vol. 32, pp. 1-10, 2015.

[11]        İ. Doymaz, "Drying of green bean and okra under solar energy," Chemical Industry and Chemical Engineering Quarterly, vol. 17, pp. 199-205, 2011.Available at:

[12]        P. K. Wankhade, R. S. Sapkal, and V. S. Sapkal, "Drying characteristics of okra slices using different drying methods by comparative evaluation," in Proceedings of the World Congress on Engineering and Computer Science  WCECS, October 24-26,  San Francisco, USA, Semantic Scholar, 2012, pp. 757-760.

[13]        D. Setiady, C. Clary, F. Younce, and B. A. Rasco, "Optimizing drying conditions for microwave-vacuum (MIVAC®) drying of Russet potatoes (Solanum tuberosum)," Drying Technology, vol. 25, pp. 1483-1489, 2007.Available at:

[14]        H. Darvishi, M. H. Khoshtaghaza, G. Najafi, and F. Nargesi, "Mathematical modeling of green pepper drying in microwave-convective dryer," Journal of Agricultural Science and Technology, vol. 15, pp. 457-465, 2013.

[15]        V. Kumara and S. L. Shrivastavaa, "Vacuum-assisted microwave drying characteristics of green bell pepper," International Journal of Food Studies, vol. 6, pp. 67-81, 2017.Available at:

[16]        İ. Doymaz, "Drying characteristics and kinetics of okra," Journal of food Engineering, vol. 69, pp. 275-279, 2005.Available at:

[17]        U. Shivhare, A. Gupta, A. Bawa, and P. Gupta, "Drying characteristics and product quality of okra," Drying Technology, vol. 18, pp. 409-419, 2000.Available at:

[18]        K. Tumba, "Convective air drying characteristics of ground macadamia nuts," Chemistry & Chemical Engineering, Biotechnology, Food Industry, vol. 19, pp. 243 – 255, 2018.

[19]        G. Ouedraogo, B. Kaboré, S. Kam, and J. Bathiébo, "Determination of physical and chemical properties of okra during convective solar drying," International Journal of Engineering and Advanced Technology (IJEAT), vol. 7, pp. 76-80, 2017.

[20]        R. Md Saleh, B. Kulig, O. Hensel, and B. Sturm, "Investigation of dynamic quality changes and optimization of drying parameters of carrots (Daucus carota var. laguna)," Journal of Food Process Engineering, vol. 43, p. e13314, 2020.Available at:

[21]        M. Aamir and W. Boonsupthip, "Effect of microwave drying on quality kinetics of okra," Journal of Food Science and Technology, vol. 54, pp. 1239-1247, 2017.

[22]        L. Diamante, M. Durand, G. Savage, and L. Vanhanen, "Effect of temperature on the drying characteristics, colour and ascorbic acid content of green and gold kiwifruits," International Food Research Journal, vol. 17, pp. 441-451, 2010.

[23]        T. Afolabi and S. Agarry, "Thin layer drying kinetics and modelling of okra (Abelmoschus esculentus (L.) Moench) slices under natural and forced convective air drying," Food Science and Quality Management, vol. 28, pp. 35-49, 2014.

[24]        J. Iminabo, M. Iminabo, and K. Dagde, "Modeling the drying kinetics of plantain chips under forced and free convection,‖," International Research Journal of Advanced Engineering and Science, vol. 3, pp. 1-6, 2018.

[25]        H.-W. Xiao, C.-L. Pang, L.-H. Wang, J.-W. Bai, W.-X. Yang, and Z.-J. Gao, "Drying kinetics and quality of Monukka seedless grapes dried in an air-impingement jet dryer," Biosystems Engineering, vol. 105, pp. 233-240, 2010.Available at:

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Salome T. Torubeli , Raphael T. Samuel , Rhoda H. Gumus (2021). Drying Characteristics and Kinetics of Okra at Different Thickness. International Journal of Chemical and Process Engineering Research, 8(1): 1-10. DOI: 10.18488/journal.65.2021.81.1.10
The effect of sample thickness and temperature on the drying characteristics of okra was investigated using a laboratory moisture analyser (Denver instrument IR-30) at sample thickness of 5mm, 10mm and 15mm and temperatures of 90oC, 100oC and 110oC respectively. The experimental data was fitted into three thin layer mathematical models. The fitness of the experimental data were evaluated using statistical analysis. It was observed that data fitted well with the Page model for the temperatures and sample thicknesses with the highest R2 values of (0.9904, 0.9962, 0.9963); (0.9963. 0.0072, 0.9937); (0.9924, 0.9940, 0.9933) for 5mm-. 15mm thickness at 90oC, 100oC and 110oC respectively with the lowest ?2, MBE and RMSE values. Therefore, Page models adequately described the drying characteristics of okra investigated. The effective moisture ratios were observed to increase with temperature and decrease with okra thickness. The activation energies obtained from Arrhenius equation for 5mm, 10mm and 15mm were 108.7KJ/mol, 118.7KJ/mol and 97.8KJ/mol respectively.
Contribution/ Originality
This study documents the characteristics and kinetics of okra with effect of thickness.