Abstract
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 (CO2) absorption efficiency with Mono-Ethanol-Amine (MEA) aqueous solution. The effect of packing rotational speed, gas to liquid inlet flow ratios, MEA and CO2 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 CO2 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 CO2 absorption efficiency about 5% at different MEA solution concentrations. With the study of CO2 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 (kGa) in the Arc-RPB.
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