Recent studies show that the bubble column and gas spargers design direct effect on hydrodynamic flow, mass transfer coefficient, absorption rate and the efficiency of the column. Researchers have recently found that the gas outlet to watch the horizontal increases the efficiency of absorption. In this thesis, a bubble column absorption equipped with a magnetic field and gas spargers with horizontal spargers with different geometries, for CO 2 separation was designed and built. Then the effect of geometric specifications gas spargers on CFD modeling of hydrodynamic flow in check, and also the effect of parameters concentrations of nanofluied, gas inlet flow rate and magnetic field on the absorption rate by experimental tests. CFD modelling results showed that more gas holdup N3DL came have with respect to less MF factor creates more uniform flow in the column. In most cases, the N3DL sparger is about 2.5 times, and in the lowest case, the N6DS sparger increases by about 1.5 times the mass transfer mass ratio compared to the ring sparger with axial playback direction. Based on the results of experimental gas discharge increase absorption and increase the use of magnetic nanofluid system mass transfer coefficient increases. The use of magnetic field against another factors have an impact on the mass transfer coefficient is less but the overall show that increasing it increases the mass transfer coefficient Keywords: bubble column, nanofluid, magnetic field, absorption of CO 2 , CFD modeling