Solubility of CO 2 in aqueous TSP

Abstract

The experimental results for CO 2 absorption in aqueous tri sodium phosphate (TSP) were presented for total TSP concentrations from 1.0 to 2.0kmol/m 3, temperatures from 303.14 to 333.14K and inlet CO 2 partial pressures from 10.13 to 20.26kPa. The solubility of CO 2 increased with increasing concentrations of TSP from 1.0 to 2.0kmol/m 3 at fixed CO 2 partial pressure and temperature. Temperature showed positive effect on CO 2 solubility and it was increased continuously from 313.14 to 333.14K. The solubility of CO 2 also increased slightly with inlet partial pressure of CO 2 in the gas stream. The maximum CO 2 solubility in TSP was found as 0.960molCO 2/mol absorbent at 333.14K and 2.0kmol/m 3 TSP concentration. The results of experimental CO 2 solubility in aqueous TSP was compared to monoethanol amine (MEA) and other amines mostly used in acid gas treating. © 2012 Elsevier B.V.