Experimental Investigation of Mass Transfer Mechanisms and Response Surface Method (RSM) Model of CO2 Absorption by Water-Aluminum Hydroxide Nanofluid

According to the greenhouse gas emission and the importance of CO2 capture as one of the most important greenhouse gases with extreme emission, nanofluids have been suggested and studied as fluids with higher mass transfer coefficients in order to enhance gas absorption. In this study, water-Al(OH)3 nanofluid which is made by dispersing hydrophilic nanoparticles capable of enhancing nanofluids stability are used and investigated by enhancing the nanoparticles' solid loading. This enhancement increases and decreases mass transfer which is assumed to be a reason for Brownian motion, Shuttle effect, and hydrodynamic effect as enhancers and viscous effects as the reducer. Selecting the optimum values by considering nanoparticles solid loadings effect on enhancement’s case study, pressure, mixing index and solid loading’s effects have been studied in detail and results represent the negative effect of pressure and enhancing and then reducing the effect of mixing index and solid loading on absorption as the maximum enhancement factor reaches the 39.012 value.