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中文摘要：
在现有CO2盐水溶液密度模型的基础上,根据CO2地下盐水溶液密度实验数据,考虑了温度、压力和CO2质量分数三个参数的影响,建立了CO2盐水溶液的表观摩尔体积模型。模型结果表明该模型能在30~50℃、10~20 MPa温压范围内准确预测CO2在盐水溶液中的表观摩尔体积,将预测结果与实验数据进行对比发现最大相对误差为0.25%,平均相对误差为0.1%,模型预测精度明显高于现有的CO2盐水溶液表观摩尔体积模型,为CO2地下盐水层封存提供了必要的基础。
英文摘要：
Based on existing CO2 saline solution density model and experimental data of CO2 subsurface brine solution density,considering the effect of temperature,pressure and CO2 mass fraction,apparent molar volume model for CO2 saline solution was established.Results showed that the model can predict the apparent molar volume of CO2 brine solution in the temperature range 30~50℃ from 10 to 20 MPa.The maximum relative error was 0.25% and average relative error was 0.1% compared with the experimental data.The model prediction accuracy was obviously higher than the existing CO2 saline solution apparent molar volume model for CO2 geological sequestration.
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