Abstract An experimental investigation of gas–liquid Taylor flows in a millimetric in-plane spiral shaped reactor with various tube curvature ratios (52 < λ < 166) is reported. Thanks to the compactness of the reactor and the use of an ad hoc imaging system and processing, the axial evolution of bubble lengths and velocities could be […]
https://pubs.acs.org/doi/abs/10.1021/acs.iecr.9b06749 Abstract Membrane fouling is one of the most investigated topics in the field of membrane processes because it is the main weakness that prevents membrane bioreactors (MBRs) from being widely applied. With a view to reducing membrane fouling, all the phenomena involved in the operation are worth understanding through a fine-tuned and deep examination. […]
Abstract In this article three different techniques for visualizing gas-liquid mass transfer are reviewed according to their applications in air-water systems. The three techniques are: Planar Laser Induced Fluorescence (PLIF with the use of fluorescent resorufin), PLIF with Inhibition (PLIF-I with the use of a ruthenium complex), and a colorimetric technique (using a redox reaction […]
Abstract This paper presents a demonstration of the visualization and the characterization of gas–liquid mass transfer in a small bubbly column. The aim is to show how simple experiments can be used to directly quantify mass transfer without the need of sophisticated probes or complex titrations. The method here proposed is based on the “red […]
New paper : Mass transfer and diffusion in the wake of single air bubbles rising in polymer aqueous solutions quantified by PLIF with inhibition Based on the planar laser-induced fluorescence with inhibition (PLIF-I) experiments, the mass transfer and diffusion phenomena in the wake of single air bubbles (equivalent diameter ∼ 1–1.4 mm) rising in various aqueous […]
An “escape game” activity is proposed to increase stimulation, team group skills, and adaptability in the chemistry classroom. The students follow in the footsteps of Nicolas Leblanc, a young French chemist, who took part in a contest launched by the French Academy of Sciences in 1775 to produce industrial soda ash. By means of scientific […]
Xiaomin Xie, Claude Le Men, Nicolas Dietrich, PhilippeSchmitz, LucFillaudeau https://doi.org/10.1016/j.seppur.2017.04.009 Separation and Purification Technology Abstract To better understand the hydrodynamics in a Dynamic Filtration module (DF), a local investigation within a complex and confined module named Rotating and Vibrating Filtration (RVF) was scrutinized under laminar flow with viscous Newtonian fluid (Remixing = 45). RVF consists of two […]
C. W. Zhao, C. Gentric, N. Dietrich, Y. G. Ma, and Huai Z. Li Physics of Fluids 29, 072108 (2017); doi: http://dx.doi.org/10.1063/1.4995476 ABSTRACT The present study aims at investigating the deformation mechanism of liquid-liquid interfaces by both the experimental and numerical approaches. The experiments reveal that the topology of an initial flat interface composed of […]
Our work, titled « Visualization of mass transfer around a bubble swarm in a 2D Hele-Shaw Cell » (Personnal Communication, 2012), has been selected for the cover of Chem. Eng. Technol. 8/2017 (page 1379). DOI: 10.1002/ceat.201770081 Copyright: Hamburg University of Technology and Fédération de Recherche FERMAT – University of Toulouse
Abstract : Gas-liquid mass transfer around Taylor bubbles moving in a meandering millimetric square channel was locally visualized and characterized in the present study. For that, the colorimetric technique proposed by Dietrich et al. (2013) was implemented. With this technique, the evolution of equivalent oxygen concentration fields in the liquid slugs passing through one and […]
