Experimental Investigation of CO2 Absorption/Desorption by Fe2O3 and TiO2 Nanoparticles

In this study, TiO2 and Fe2O3 nanoparticles were used in enhancing CO2 absorption and stripping. For this regards, mentioned nanoparticles at different concentration were applied to 10 wt.% MDEA solution for CO2 absorption/desorption at a bubble column. Also, the Zeta potential analysis were studied to evaluate of all nanofluids stability and the experimental results of CO2 absorption and stripping was reported in presence nanoparticles. The results reveals that all nanofluids had better capability for CO2 absorption, TiO2 nanofluid with 0.1 wt.% concentration can increased CO2 absorption up to 28.4%, that it had highest performance than the other nanofluids due to more stability. In addition, the experimental tests of regeneration were shown lower ability of Fe2O3 nanoparticles on CO2 stripping than the TiO2 due to lower stability. Accordingly, TiO2 and Fe2O3 nano fluids at 0.05 wt.% concentration and 70oC regeneration temperature were lead to raising CO2 desorption as 25.8% and 24.5%, respectively.