Speaker: Gilles HÉBRARD, Professor LISBP, INSA Toulouse, France
Time: Tuesday 16th of October, 09:30 am to 10:30 am
Location: 2nd meeting room (South second floor), School of Aerospace, Xi'an Jiaotong University
Title: Hydrodynamics and mass transfer in spraying systems: new visualization techniques
Abstract:
Scrubber systems are more and more used to achieve compounds absorption present into a gas phase. For example, they can be used for air pollutant removal like Volatile Organic Compounds (VOC) (Tatin et al. 2015; Hariz et al. 2017) or carbon dioxide (Wongwailikhit PhD 2018). These systems use spraying nozzles to provide interfacial area insuring mass transfer; they are power consuming that is why they need to be improved and their behavior better understand.
The topic of this presentation is to show how these new techniques can be helpful to master the hydrodynamics of the spray by measuring the droplet sizes, their velocities and the associated liquid fraction created into the scrubber. Two Optical Fiber Probes and one high speed camera have been tested for different nozzle sizes and liquid throughputs. The data have been compared and commented. One example of VOC absorption is presented in order to show the importance of mastering the interfacial area provided into a scrubber.
Figure 1: Spraying systems characterized thanks to Optical probe or high speed camera
Biography:
Professor Gilles HÉBRARD (51 years old) received his Doctor degree (PhD) in water treatment process in 1995. He is Professor at INSA Toulouse in the Chemical and Environmental Engineering Department since 01/09/2007. His research activities deal with the local and global analysis of hydrodynamic and mass transfer present in gas/liquid contactors. He develops his research activities in TIM (Transfert Interface Mixing) group of LISBP (Laboratoire d’Ingénierie des Systèmes Biologiques et Procédés). He stayed as visiting Professor at UBC (University of British Colombia) in Canada in John R. GRACE research group from August 2011 to August 2012. He has supervised 14 PhD, 5 post-doct and 20 MASTER research. He has published 125 publications and communication with 52 articles in international journals of mark A, 4 patents and one chapter of book. He teaches at INSA mass transfer operation and thermodynamic (Energy and Exergy balance). He is the head of the Chemical and Environmental Engineering Department since 01/07/2015 (50 students graduate per year)
