| The performance of amine blends of different molar ratios in MEA-AMP was evaluated in a bench-scale packed bed using structured packing. Experiments for different concentrations, liquid flow rates, temperatures, CO2 loadings and molar ratios were carried out. The overall gas mass transfer coefficient (KGae) was calculated for all runs and a formula was predicted, based on various factors.;Henry's Constant for MEA was estimated using two different methods published in the literature. The values for Henry's Constant, KGae, second-order rate constants and diffusivity values were then used in the equation for Two-Film Theory for estimating effective mass transfer area for MEA for different temperatures and liquid flow rates. Density, viscosity and surface tension of different amine blends were calculated using correlations from existing literature. These were used to estimate the effective area of blends for different temperatures and flow rates. The estimated effective areas of blends were used with Henry's Constant values, calculated from another method in literature, to evaluate the liquid side mass transfer coefficient. The liquid side mass coefficients in packed beds from KGae values have been reported in this study.;It was observed MEA topped among the different blends used for the experimentation. Also, the blend with the highest molar ratio of MEA, i.e in MEA-AMP=2:1, performed better than other blends. However, the effective mass transfer area of the blend with molar ratio MEA-AMP=2:1 was not the highest as physical properties affected the area. The liquid side mass transfer coefficient was highest for MEA followed by blends having more MEA content in them. |
