Post-Combustion CO2 Capture with Sulfolane Based Activated Alkanolamine Solvent

摘要

In this work, new experimental data on vapour-liquid equilibrium (VLE) of CO2 in piperazine (PZ) activated aqueous solutions of n-methyldiethylamine (MDEA) and hybrid solvents containing sulfolane as physical solvent along with aqueous (MDEA+PZ) have been reported over the temperature range of (313-333) K and CO2 partial pressure range of (1-1400) kPa. PZ is used as a rate activator with a concentration range of 2 to 8 mass% and the total amine concentration in the aqueous solution of (MDEA+PZ) has been kept within 50 mass%, while the concentration of physical solvent sulfolane has been maintained at 10 mass%. Electrolyte non random two-liquid (ENRTL) theory has been used to model the VLE. A simulation work has been carried out using Aspen Plus (V7.1) to evaluate the energy requirements on % CCh removal. The hybrid solvent showed higher % CCh removal when compared with those of PZ-activated aqueous MDEA.