CO2 mitigation studies in packed absorption column using iron oxide nano fluid

Abstract

The challenging task in our ecosystem is to reduce acidic gas emissions to some extent. Many gases are emitted from the industries like H2S, CO, CO2, SO2, NO, and NO2 as exhaust gases. Among these gases CO2, NO2 and SO2 are known as acidic gases which result in adverse effects on human beings, animals, and plants. Owing to the increase in the emission of CO2 gases from both anthropogenic and industrial sources, it has resulted in CO2 mitigation studies. CO2 absorption studies have been carried out by employing iron oxide nanofluid with the novel structured packed absorption column. Iron oxide nanoparticles were synthesized and characterized using XRD analysis, SEM analysis, and TEM analysis. Ammonia is used as an absorbent along with iron oxide nanofluid of three different concentrations (0.0001 w/v%, 0.001 w/v%, and 0.0015 w/v%). It was found that the iron oxide nanofluid of 0.0015 w/v% showed an improved % CO2 removal efficiency. This enhanced % CO2 removal efficiency was due to the increased interfacial area of the ameliorated contact between the liquid and gas phase. Along with the packed column the magnetic field was introduced, which resulted in increased % CO2 removal efficiency of 1.5%.