Experimental and theoretical investigation on viscosity of carbonated piperazine (PZ) activated 1-dimethylamino-2-propanol (DMA2P) aqueous blends

In this study, we investigated the viscosity data of carbonated aqueous blends of 1-dimethylamino-2-propanol (DMA2P) and piperazine (PZ) over a temperature range of 303.2 to 323.2 K at atmospheric pressure. The concentration of DMA2P and PZ ranged from 30 wt% to 50 wt% and 2.5 wt% to 7.5 wt%, respectively. The experimental viscosities were calculated and predicted using the Weiland equation. The calculations showed good agreement with the experimental results, yielding an average relative deviation of 2.18%. Furthermore, the viscosity activation energy ( E a) and the estimated diffusion coefficient of CO 2 ( D CO2 ) into the carbonated DMA2P-PZ aqueous blends were derived using the Arrhenius-type expression and the modified Stokes-Einstein equation, respectively. The results indicate that the DMA2P-PZ absorbent exhibits promising potential for industrial application in CO 2 capture processes.