Co2 Solubility In Aqueous Blend Diethanolamine (Dea) And Piperazine (Pz) Solution

The solvent blend diethanolamine/piperazine (DEA/PZ) has been investigated as an alternative for CO2 capture from coal fired power plants. Solubility data of carbon dioxide In aqueous mixtures of diethanolamine (DEA) with piperazine (PZ) have been measured at 30oC, 50oC and 70oC and at partial pressures of carbon dioxide between 200 and 1000 kPa. The mixtures of alkanolamlnes studied are 20 wt % DEA, 40 wt % DEA, 20 wt % DEA + 5wt%PZ, 20 wt % DEA + 10wt%PZ, 40 wt % DEA + 5 wt % PZ and 40 wt % DEA + 10 wt % PZ aqueous solutions. The solubility of carbon dioxide in aqueous solutions is reported as functions of partial pressures of carbon dioxide at the temperatures studied. Further physical properties (Refractive Index, density and viscosity) on aqueous blend solution also been done. All of the measured physical property values were correlated as a function of temperature.