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在微扰链统计缔合流体理论(PC-SAFT)的基础上建立了适用于二氧化碳-水体系相行为研究的状态方程,以汽-液平衡和液-液平衡实验数据关联体系的交叉作用参数,关联结果与实验数据吻合良好.预测了二氧化碳-水体系存在汽-液-液三相平衡的温度和压力区间,确定了三相点的汽-液-液三相密度及其与温度和压力的关系.
Based on PC-SAFT, the equation of state for phase behavior of carbon dioxide-water system was established. Based on the cross-reaction parameters of the experimental system of vapor-liquid equilibrium and liquid-liquid equilibrium , And the correlation results are in good agreement with the experimental data.The temperature and pressure ranges of the vapor-liquid-liquid three-phase equilibrium in the carbon dioxide-water system are predicted, and the vapor-liquid-liquid three-phase density of the three-phase point and its relationship with temperature and pressure Relationship.