Oleaster (Elaeagnus Angustifolia L.) low-fibrous extract to powder: Drying kinetics analysis

Abstract

Oleaster's emerging applications in the food and pharmaceutical industries are due to its anti-cancer and pain-relieving properties. Green extraction methods are crucial to ensure drug compatibility to eliminate unwanted substances. This study focuses on the single droplet drying method to simply mimic a spray dryer, investigating how the drying medium controls droplet evolution into particles. Experiments were conducted with low-fibrous oleaster extract at various initial solid concentrations and ambient temperatures (100 °C, 150 °C, and 200 °C). This paper also delves into the influence of temperature on droplet morphology evolution, impacting the final particle's characteristics. The droplet diameter exhibits intricate behavior, involving normal evaporation, abrupt shape, and size changes, and concluding in a sticky solid state. Moreover, the drying process duration extends with higher initial droplet concentrations. The findings recommend using 150 °C and 200 °C as favorable drying temperatures, resulting in raspberry-like particles at high temperatures and shedding light on the oleaster extract drying.