| CO2水合物在电解质溶液中的相平衡预测 |
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| 引用本文： | 查丽,梁德青,何松.CO2水合物在电解质溶液中的相平衡预测[J].工程热物理学报,2012(7):1105-1108. |
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| 作者姓名： | 查丽 梁德青 何松 |
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| 作者单位： | 中国科学院广州能源研究所;中国科学院研究生院 |
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| 基金项目： | 国家自然科学基金资助项目(No.51176192);国家自然科学基金-广东省联合基金资助项目(No.U0933004) |
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| 摘 要： | 关于二氧化碳水合物基础物性的研究,对二氧化碳置换开采天然气水合物和工业废气二氧化碳的深海埋藏具有重要意义。本文在Van der Waals-Platteeuw理论和Pizter的电解质模型的基础上,考虑了电解质和温度对二氧化碳在水中溶解度的影响,从理论上对水合物相平衡模型进行了修正,提高了预测的精度。本文预测了二氧化碳水合物在NaCl、KCl、CaCl2、MgCl2的一元及二元溶液体系中的相平衡条件,预测的最大压力误差7.92%,平均压力误差在1%～3%之间。结果表明,本文的理论预测结果和实验数据吻合较好。
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| 关 键 词： | CO2水合物 预测 相平衡 |
Prediction of CO2 Hydrate Phase Equilibria in Aqueous Electrolytes Solutions |
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| ZHA Li,LIANG De-Qing,HE Song.Prediction of CO2 Hydrate Phase Equilibria in Aqueous Electrolytes Solutions[J].Journal of Engineering Thermophysics,2012(7):1105-1108. |
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| Authors: | ZHA Li LIANG De-Qing HE Song |
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| Institution: | 1,2) (1.Guangzhou Institute of Energy Conversion,CAS,Guangdong,Guangzhou 510640,China; 2.Graduate School of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | The study on the basic physicochemical properties of CO2 hydrate has great value in the research on the replacement of CH4 in natural gas hydrate and CO2 deep sea sequestration.This work considers the effects of electrolytes and temperature on the solubility of CO2 in water,on the basis of Van der Waals-Platteeuw theory and Pizter’s electrolyte model.It modifies the phase equilibria model of gas hydrate and improves the forecast accuracy.It predicts the the phase equilibrium conditions of CO2 hydrate in aqueous solutions of NaCl、Kl、CaCl2、MgCl2 and its binary mixtures.The maximum pressure deviation of the prediction is 7.92%,and the average pressure deviation is in the range of 1%～3%.The prediction results demonstrates that the forecast of this work has a good agreement with the experimental data. |
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| Keywords: | CO2 hydrate prediction phase equilibria |
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