Gilles Hébrard

TL;DR: In this article, the overall gas hold-up, the volumetric mass transfer coefficient, the liquid side mass transfer coefficients, and the bubble size were investigated in two bubble columns and a non-standard vessel equipped with various dual-impeller combinations.

TL;DR: In this paper, the effect of surfactants on the mass transfer parameters (volumetric mass transfer coefficient kLakLa and liquid-side mass transfer coefficients kL)kL) was investigated.

TL;DR: In this article, the effect of liquid properties (surfactants) on bubble generation phenomenon, interfacial area and liquid-side mass transfer coefficient was investigated, and the results showed that the presence of surfactants affects the bubble generation process and thus the surface coverage ratio at equilibrium.

TL;DR: In this article, the effect of the presence in clean water of some compounds usually encountered in biological media and quantifying their consequences on liquid-side mass transfer coefficients was investigated, and it was shown that even if the properties of clean water (density, viscosity, surface tension) were not significantly changed by the addition of salts (NaCl), the liquid-sensor transfer coefficients could be, all the same, modified.

TL;DR: Over 1.7 billion students around the world have had their education disrupted by the spread of the Coronavirus disease worldwide as discussed by the authors, and schools and universities have not faced this level of disruption si...