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

Carbon dioxide is considered as the main greenhouse gas responsible for climate change. Absorption of CO2 by liquid phase has gained attention as a means of mitigating environmental challenges. In this study, the effect of Fe3O4 nanoparticles on the CO2-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. Fe3O4/water nanofluid was used in 0.001-0.05 vol% concentrations. The results show that adding Fe3O4 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 CO2 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.

Automated summary

This study experimentally evaluated the effect of Fe3O4 nanoparticles on the CO2-water mass transfer coefficient during absorption, showing that adding Fe3O4 nanoparticles to water increases the mass transfer coefficient and it increases with an increase in nanofluid concentration. The presence of a magnetic field further enhanced the mass transfer efficiency.