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中文摘要：
为研究重铬酸钠（Na2Cr2O7）对CO2溶解的影响, 本文在带有搅拌的气液相高压平衡釜内, 采用静态法测定了温度在313.2-333.2 K, 压力在0.1-1.9 MPa 范围内, 重铬酸钠浓度分别为0、0.361、0.650、0.901 mol·kg-1 时, CO2 在Na2Cr2O7溶液中的溶解度. 结果表明： （1） Na2Cr2O7对CO2 的溶解有盐析效应; （2） CO2 在Na2Cr2O7溶液中的溶解符合亨利定律, 并且CO2溶解度是温度和Na2Cr2O7浓度的函数, 且用改进的Setschenow方程和Peng-Robinson-Pitzer （PR-Pitzer）方程拟合了在此温度、压力及重铬酸钠浓度范围内的实验数据, 拟合效果较好, 并且其平均相对误差分别为4.24%和3.32%.
英文摘要：
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 cell 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.
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