Review: fundamentals, applications and potentials of ultrasound-assisted drying

Publication date: Available online 22 November 2019Source: Chemical Engineering Research and DesignAuthor(s): Yuwei Zhang, Nicolas AbatzoglouAbstractThis review aims at comprehensively presenting the state-of-the-art of Ultrasound-Assisted Drying (UAD).UAD represents a promising hybrid drying technique that enhances drying rate and energy efficiency while preserving the quality of the materials being dried. However, in accordance to literature, the limited knowledge and capacity of ultrasonic equipment still prevent this technology from being used in practical industrial applications.The first part briefly described the fundamentals of ultrasound. One major challenge of developing UAD is its multidisciplinary nature; the intention is to extend our knowledge on acoustic science in order to understand the role of ultrasound in drying enhancement.The second part encompasses the latest UAD studies; they are focused on four research subjects:1) UAD equipment2) Influence of ultrasound on drying performance3) Parametric analyses4) Impacts of ultrasound on the quality of dried materialsProgress has been made in the last two decades, but to date, researchers are not fully capable of explaining certain contradictory observations such as those presented herein. This review synthesizes the published results and analyzes them with respect to the specific drying conditions; then, some explanations are suggested.Graphical Abstract
Source: Chemical Engineering Research and Design - Category: Chemistry Source Type: research