Experimental investigation of using nanofluids in the gas absorption in a venturi scrubber equipped with a magnetic field

In this study, the effects of Fe3O4/water nanofluid on the CO2 removal efficiency in a venturi scrubber equipped with a magnetic field were investigated. The results demonstrated the positive effects of both the magnetic field and magnetic nanoparticles on the CO2 removal efficiency. The optimum conditions were determined by using the Taguchi method. In the presence of the magnetic field and with the use of magnetic nanoparticles under the optimum terms, CO2 removal percentage reached 17.56%, while it was 8.61% for the water without the magnetic field. On the other hand, the pressure drop in the venturi scrubber was increased in the presence of the magnetic field and increased by increasing the nanofluid concentration. •Magnetic field is an effective parameter on CO2 absorption rate and pressure drop.•Droplet distribution in nanofluid is more uniform in comparison with pure water.•Use of magnetic field increases the uniformity of the droplets distribution.•The pressure drop increases by increasing the nanofluid concentration.