The solubility of CO2 in aqueous Na2Cr2O7 solutions of different concentrations (0,0.361,0.650, and 0.901 mol·kg-1) was measured in a stirred vapor-liquid high-pressure equilibrium cel using the static method at temperatures and pressures in the ranges of 313.2 to 333.2 K and 0.1 to 1.9 MPa, respectively. The results indicated that the phenomenon of CO2 dissolved in aqueous Na2Cr2O7 could be interpreted according to a“salting-out effect”. Furthermore, our solubility data for CO2 in aqueous Na2Cr2O7 was in agreement with Henry?s law, and the Henry constant appeared to be a function of temperature, pressure, and the concentration of Na2Cr2O7. Two thermodynamic models were applied to correlate the experimental data, including the modified Setschenow and Peng-Robinson-Pitzer equations, and the averaged relative deviations were found to be 4.24%and 3.32%, respectively.