A mathematical model for single CO2 bubble motion with mass transfer and surfactant adsorption/desorption in stagnant surfactant solutions

•A mathematical model was proposed to predict the bubble motion and mass transfer.•Effect of surfactant desorption and adsorption was considered in the model.•CO2 bubble shape, rising velocity, and kL in surfactant solutions are measured.•The effect of surfactant on bubble motion and mass transfer was analyzed.