Freeze-drying kinetics and diffusion modeling of hawthorn

Year 2023, Volume: 9 Issue: 4, 876 - 884, 04.08.2023

Khaled Ali Hagıg Bahadır Acar Edip Taşkesen Edip Taşkesen Edip Taşkesen Mehmet Özkaymak

https://doi.org/10.18186/thermal.1327094

Abstract

This study tests freeze-drying (FD) technology (Scanvac Coolsafe model, Labogene brand) to preserve hawthorn fruit. First, 100g hawthorn slices were frozen and then freeze-dried. Kinet-ic models were applied, and hawthorn’s moisture ratio and weight loss were noted after every two hours during the 14-hour freeze-drying process. Matlab program is used to perform a to-tal of eight kinetic drying models. Results show that the root mean square error was 0.011063, the highest determination coefficient was 0.9987, the least chi-square was 1.959x10-4, and the effective diffusivity was 2.33742x10-10m2/s. The diffusion approach is the best among the eight models.

Keywords

Drying Kinetics, Freeze-drying, Kinetic Drying Model, Diffusion Approach Model, Drying Hawthorn

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