论文信息 - The Effect of SO2 on CO2 Absorption in an Aqueous Potassium Carbonate Solvent

The Effect of SO2 on CO2 Absorption in an Aqueous Potassium Carbonate Solvent

Abstract In solvent absorption systems for carbon dioxide capture, potassium carbonate shows particular promise as a solvent. One of the advantages of this solvent is that it is more manageable by way of separation and/or cost effectiveness in the presence of SO 2 . This paper examines the feasibility of using the same absorber system for simultaneous capture of both CO 2 and SO 2 from post combustion flue gases. Using a dynamic equilibrium apparatus, the changes in the vapour pressure were measured upon the introduction of sulphur dioxide to a CO 2 / N 2 mixed gas stream. It has been shown that there is a small change in the resultant vapour pressure. The overall affect of SO 2 on the efficiency of CO 2 capture is discussed.

[1] Lawrence B. Evans,et al. A local composition model for the excess Gibbs energy of aqueous electrolyte systems , 1986 .

[2] W. P. Haynes,et al. Equilibrium study of the system potassium carbonate, potassium bicarbonate, carbon dioxide, and water , 1959 .

[3] The measurement and prediction of the solubility of acid gases in monoethanolamine solutions at low partial pressures , 1977 .

[4] Lawrence B. Evans,et al. Extension and application of the pitzer equation for vapor‐liquid equilibrium of aqueous electrolyte systems with molecular solutes , 1979 .

[5] Marcus Hilliard. THERMODYNAMICS OF AQUEOUS PIPERAZINE/POTASSIUM CARBONATE/CARBON DIOXIDE CHARACTERIZED BY THE ELECTROLYTE NRTL MODEL WITHIN ASPEN PLUS , 2005 .

[6] A. E. Mather,et al. Solubility of mixtures of hydrogen sulfide and carbon dioxide in a monoethanolamine solution at low partial pressures , 1980 .