Air-pulsed columns are used for specific solvent extraction processes which require maintenance-free equipment. The design of plate internal impacts the hydrodynamics and mass transfer rate in air-pulsed columns. Most of the studies on air-pulsed column focus on two conventional plate internals, i.e. sieve plates and disc and doughnut plates. In this study, a novel design of plate internal—linear slotted plate—is conceptualized. Linear slotted plates are characterized by 3 mm wide linear slots provided on a circular plate. Single-phase hydrodynamics and axial dispersion in air-pulsed column having linear slotted plate internal is reported. A comparison is done with disc and doughnut plate internal. A 3D CFD model of a 3 inch diameter column is reported. The open-source CFD software (OpenFOAM v10) has been used in the study. The numerical solution is obtained in two steps. Firstly, hydrodynamics (flow field) is predicted using pimpleFoam solver. Secondly, a snapshot approach is used to determine axial dispersion coefficient in the column. In this case, the velocity/flow fields obtained in the first step at two different instants of pulsing cycle are used to solve species transport equation. Axial dispersion coefficient is obtained for both flow fields and the overall axial dispersion coefficient is taken as arithmetic average of the two. scalarTransportFoam solver is used for solution of species transport equation. Step-1 is validated with the reported experimental data on local time varying velocity in a disc and doughnut pulsed column while scalarTransportFoam used in step-2 is validated against analytical expression. Axial dispersion is found to be less in linear slotted plate internal vis-à-vis disc and doughnut plate internal.