中文摘要：

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.

英文摘要：

An equation of state applicable to the phase behavior of a CO2-water binary mixture was established based on the perturbed-chain statistical associating fluid theory （PC-SAFT）. The binary interaction parameter was regressed by fitting to the experimental data of vapor-liquid and liquid-liquid equilibria, and the correlation agreed well with experiments. The temperature and pressure ranges for vapor-liquid-liquid three phase equilibria of the CO2-water binary mixture were predicted. The densities corresponding to the coexisting three phases of the triple points and their temperature and pressure dependence were determined.