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The Computational Fluid Dynamics (CFD) technique was used to study the effect of the geometrical parameters on the intensification of hydrodynamic parameters and Carbon dioxide (C O 2) absorption efficiency by Mono-Ethanol-Amine (MEA) solution in a novel Arc-blade Rotating Packed Bed reactor (Arc-RPB). The VOF multiphase approach and RNG k - ε turbulent model were used to study the multiphase and turbulent behavior of the flow field in the computational domain, respectively. The effects of liquid flow rate, the bed wire mesh diameter, and number of the mesh layers were studied on the liquid holdup (α L) , gas-liquid interfacial area (A int) and liquid dispersion index (I d). Considering the Arc-RPB bed wire mesh diameter from 0.2 mm to 1.6 mm showed that α L , A int and I d decrease 20%, 29% and 11%, respectively. By examining the effect of the bed layers enhancement, the liquid holdup α L decreased by about 36% but, A int and I d reached a maximum value at 16 bed layers. Finally, with study the effect of the bed geometrical parameters on C O 2 absorption efficiency, results showed the efficiency reduces about 7.5% with increase in the bed mesh diameter and shows a maximum at 16 bed layers. [Display omitted] • Study of geometrical parameters effects on the hydrodynamic characteristics of a novel Arc-RPB by CFD simulation. • High effect of bed wire mesh and bed layer number in intensification of absorption efficiency of C O 2 by MEA solution. • Dependence of absorption efficiency to the liquid dispersion index. [ABSTRACT FROM AUTHOR]

• Development of a novel design of RPB with Arc-blades (Arc-RPB) to absorb C O 2 by MEA solution. • High effect of Arc-RPB in intensification of absorption efficiency. • Development of a correlation to predict gas-phase volumetric mass transfer coefficient in the Arc-RPB. In this research, a new design of high-gravity (HiGee) Arc-blade Rotating Packed Bed (Arc-RPB) was introduced to study the Arc-RPB effect on carbon dioxide (C O 2) absorption efficiency with Mono-Ethanol-Amine (MEA) aqueous solution. The effect of packing rotational speed, gas to liquid inlet flow ratios, MEA and C O 2 concentrations were studied on absorption efficiency of the Arc-RPB. Experimental results showed that an increase in the rotational speed of Arc-RPB from 300 rpm to 900 rpm enhances C O 2 absorption efficiency about 9% and 3% for 1 M and 2 M MEA solution, respectively. Also, experiments indicated that an increase in the gas to liquid flow ratio decreases C O 2 absorption efficiency about 5% at different MEA solution concentrations. With the study of C O 2 inlet concentration from 5000 ppm to 20,000 ppm, it was found that absorption efficiency enhances about 10% in the Arc-RPB. Experimental work showed that by enhancing MEA solution concentration from 0.5 M to 1 M, absorption efficiency increases about 23%, but an increase in MEA solution concentration from 1 M to 2 M enhances efficiency less than 3%. Also, based on experimental data and genetic algorithm (GA) optimization method, a correlation was proposed to predict gas-phase volumetric mass transfer coefficient (k G a) in the Arc-RPB. [Display omitted] [ABSTRACT FROM AUTHOR]