Experimental solubility of hydrogen sulfide and carbon dioxide in dimethylformamide and dimethylsulfoxide

The solubility of hydrogen sulfide and carbondioxide in dimethylsulfoxide and dimethylformamide were experimentally measured. Gas concentrations were systematically measured by isochoric saturation method at temperatures from 303.15 to 353.15 K and pressure from vapor pressure of solvent up to about 2.0 MPa. Results show that H2S dissolves more than CO2 in both solvents, and that chemical dissolution has significant role in H2S solubility in dimethylsulfoxide. The experimental data were correlated by using: (1) a model comprised of the extended Henry's law and Pitzer's virial expansion for the excess Gibbs energy, and (2) a generic Redlich–Kwong (RK) cubic equation of state.