Gas entrainment and holdup characteristics in a modified gas-liquid-solid down flow three-phase contactor

► Efficient gas entrainment characteristics in the modified three-phase contactor. ► The modified contactor shows higher gas holdup compared to other conventional systems. ► The gas holdup data were analyzed by slip velocity model. ► Analysis of energy efficiency of the modified contactor. ► Correlations developed for gas holdup, entrainment and minimum required energy.