Effect of Ultrasound on Adsorption and Desorption Processes

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• 作者：Marc Breitbach ; Dieter Bathen ; and Henner Schmidt-Traub
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2003
• 出版时间：October 29, 2003
• 年：2003
• 卷：42
• 期：22
• 页码：5635 - 5646
• 全文大小：301K
• 年卷期：v.42,no.22(October 29, 2003)
• ISSN：1520-5045

文摘

The following paper is aimed at finding the effects of ultrasound on adsorption/desorptionprocesses. Experiments concerning the ultrasonic power input indicate that particles absorbultrasonic energy effectively if they are in resonance with the ultrasound. The ultrasonic energyis dissipated into heat. Hence, desorption processes are promoted. Desorption experiments atdifferent frequencies show that neither particle oscillations nor cavitation effects are responsiblefor ultrasonically enhanced desorption processes for an adsorption system with surface diffusionas the rate-limiting step. Measured ultrasonic power distributions show that the ultrasonic fieldinside the adsorber is very inhomogeneous. With the temperature distribution inside the adsorber,the courses of concentration of ultrasonically enhanced desorption experiments can be explainedby a hot-water desorption model. Thus, simulations substantiate the experimental results thatthermal effects are responsible for ultrasonically enhanced desorption with the applied adsorptionsystem.