Here, y i represents the mole fraction of component i in the gas phase, linked to the gas-phase concentration as C i,g = y i C T . In this relation, C T is the total concentration in the gas phase, defined by both pressure and temperature. The variable t stands for time, z the direction perpendicular to the liquid-gas interface, while D i,air indicates the diffusivity of component i in the air. D i,air was estimated from correlation and given as: