Mass transfer characteristics of gas–liquid absorption during Taylor flow in mini/microchannel reactors

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

“…Previous works have indicated that the Armand correlation (Eq. (7)) [77] can accurately predict the gas void fraction in channels having the present range of dimensions [78][79][80][81][82][83][84]. This correlation was used for validating the void fraction data obtained in the present study.…”

An online method to measure mass transfer of slug flow in a microchannel

“…Mass transfer characteristics of gas-liquid slug flow in microchannels have also been a hot subject in literature (Berčič and Pintar, 1997;Ganapathy et al, 2013;van Baten and Krishna, 2004;Vandu et al, 2005;Yue et al, 2007). Earlier work was carried out experimentally in capillaries with different diameters by Berčič and Pintar (1997), who found that the overall liquid side volumetric mass transfer coefficient is related to flow details such as bubble velocity and bubble length.…”

Investigation of the Taylor bubble under the effect of dissolution in microchannel

“…It should be noticed that the diffusion coefficients D for CO 2 in liquid ethanol or liquid methanol are also constant which means the thermal diffusion (Soret effect) and the chemical reaction are not considered. [12,[15][16][17][18][19]21] where the bubble formation was not considered, the numerical investigation in the present study considers a completed dissolution process from bubble formation to dissolution.…”

“…A common approach used to evaluate the interfacial mass transfer is to estimate the mass flux by the interfacial concentration gradient [15,16,18,19].…”

“…The numerical results made it clear that the effect of agitation of concentration boundary layer due to interfacial waves on the total mass transfer rate was weak. Ganapathy et al [19] presented a two-dimensional numerical study of absorption of CO 2 into NaOH aqueous solution in the Taylor flow in mini/microchannel reactors. A decoupled approach was developed in which the Taylor flow was simplified to be gas and liquid slugs without liquid film, and the reactive mass transfer was theoretically estimated.…”