Improvement of CO₂ absorption by Fe₃O₄/water nanofluid falling liquid film in presence of the magnetic field

Abstract

Carbon dioxide is considered as the main greenhouse gas responsible for climate change. Absorption of CO 2 by liquid phase has gained attention as a means of mitigating environmental challenges. In this study, the effect of Fe 3 O 4 nanoparticles on the CO 2-water mass transfer coefficient was experimentally evaluated in the presence and absence of a magnetic field. The absorption experiments were carried out in a falling liquid film absorber system in laminar and turbulent flow regimes. Fe 3 O 4 /water nanofluid was used in 0.001-0.05 vol% concentrations. The results show that adding Fe 3 O 4 nanoparticles to water increases the mass transfer coefficient (MTC), and that it increases with an increase in nanofluid concentration. For a concentration of 0.05 vol% nanofluid, the MTC was improved 111% and 13.7% in the turbulent and laminar flow regimes, respectively. The mass transfer coefficient of CO 2 in water and effective mass transfer coefficient in nanofluid were increased up to 10% and 29% in the presence of a parallel alternative magnetic field, respectively.

Experimental study on the absorption enhancement of CO2 by MDEA‐MEA based nanofluids

“…The preparation method of nanofluids is mainly divided into the one‐step method and two‐step method, with the two‐step method having wide versatility and stability. [ 32 ] Dispersion techniques such as adding surfactants, ultrasonic vibration, and changing the pH value of the base fluid are usually adopted to obtain better dispersion performance [ 33,34 ] ; the surfactant ASAP and ultrasonic cell disruption are needed in this experiment.…”