Document Type : Research Article
Molasadra St., Shiraz University, Shiraz, Iran
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz., Iran
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz , Iran
In this study, TiO2 and Fe2O3 nanoparticles were used to enhance CO2 absorption and stripping. To do so, the nanoparticles at different concentrations were applied to 10 wt.% MDEA solution for CO2 absorption/desorption in a bubble column system. Also, zeta potential analysis was employed to evaluate all nanofluids' stability and the experimental results of CO2 absorption and stripping were reported in the presence of nanoparticles. The results revealed that all nanofluids had a better capability for CO2 absorption. Moreover, TiO2 nanofluid, with 0.1 wt.% concentration, could increase CO2 absorption up to 28.4% and it had the highest performance due to its higher stability. In addition, the result of the regeneration experiment showed the lower ability of Fe2O3 nanoparticles in CO2 stripping than TiO2 due to its lower stability. Consequently, TiO2 and Fe2O3 nanofluids at 0.05 wt.% concentration and 70oC regeneration temperature led to CO2 desorption increment by 25.8% and 24.5%, respectively.