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研究了用 Ｐ－ Ｒ 模型确定含 Ｃ Ｏ２ 体系的气液平衡问题． 利用１１ 个典型体系，５１４ 个含 Ｃ Ｏ２ 体系的气液平衡实验数据，拟合出 Ｐ－ Ｒ 模型相应体系的二元交互作用因数ｋｉｊ 及ｋｉｊ 随温度变化的关系式． 结果表明： Ｐ－ Ｒ 模型对 Ｃ Ｏ２ － 烃类体系气液平衡数据具有较好的预测精度，尤其是引入二元交互作用因数之后，泡点压力 ｐ 的平均相对误差由原来的２６ ．６０ ％ 降为０ ．４８ ％ ，气相组成 ｙｉ 与平衡常数 Ｋｉ 的预测精度均得到提高．
The P-R model was used to determine the gas-liquid equilibrium of C O2 -containing systems. Based on the gas-liquid equilibrium experimental data of 11 typical systems and 514 C O2-containing systems, the relationships between the binary interaction factors kij and kij with temperature for the corresponding system of P-R model were fitted. The results show that the P - R model has good prediction accuracy for the gas - liquid equilibrium data of C O2 - hydrocarbon system. Especially after the binary interaction factor is introduced, the average relative error of bubble point pressure p is reduced from 26. 60% down to 0. 48%, the prediction accuracy of the gas phase composition yi and the equilibrium constant Ki are improved.