Enhancement of vapour absorption into a solution using the Marangoni effect (1st report, Mechanism for the inducement of the Marangoni convection and effects of steam absorption enhancement by the addition of higher alcohol)

Multi-factorial study of the absorption process of H2O(vap) by a LiBr(aq) in a horizontal tube bundle using 2-ethyl-1-hexanol as surfactant

“…Although Pearson [4] already in 1958 pointed out the existence of surface tension effects in drying paint films, Kashiwagi et al [5] was one of the first to point out that the Marangoni instability (i.e. convection due to surface tension gradients) seemed to be the reason for the observed turbulence at the interface between the water vapour and the aqueous LiBr solution.…”

Enhancement of steam absorption into a film of LiBr aqueous solution falling over a downward‐facing plate

“…Kashiwagi and colleagues considered that this effect is caused by Marangoni convection, and they conducted a series of studies on this effect [1][2][3]. Although adding surfactant is certainly effective in promoting absorption, its mixing effect is limited to the vicinity of the liquid surface.…”

WATER VAPOR ABSORPTION ENHANCEMENT IN LiBr/H2O FILMS FALLING ON HORIZONTAL TUBES

“…So far, several theoretical approaches for analyzing simple systems such as a vertical plane or a bare tube have been published [1][2][3]. Additionally, the effects of extending the heat transfer surface [4] and introducing a surfactant additive [5] to improve the absorption efficiency were investigated. However, since the absorption process in the absorber is a simultaneous heat and mass transfer problem, there are still several aspects that are not well understood, such as the detailed heat and mass transfer mechanisms and other factors that dominate the performance of this system.…”