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首页> 外文期刊>AIChE Journal >Experimental studies and modeling of CO2 solubility in high temperature aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions
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Experimental studies and modeling of CO2 solubility in high temperature aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions

机译:在高温CaCl2,MgCl2,Na2SO4和KCl溶液中CO2溶解度的实验研究和建模

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摘要

The phase equilibria of CO2 and aqueous electrolyte solutions are important to various chemical-, petroleum-, and environmental-related technical applications. CO2 solubility in aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions at a pressure of 15 MPa, the temperatures from 323 to 423 K, and the ionic strength from 1 to 6 mol kg(-1) were measured. Based on the measured experimental CO2 solubility, the previous developed fugacity-activity thermodynamic model for the CO2-NaCl-H2O system was extended to account for the effects of different salt species on CO2 solubility in aqueous solutions at temperatures up to 523 K, pressures up to 150 MPa, and salt concentrations up to saturation. Comparisons of different models against literature data reveal a clear improvement of the proposed PSUCO2 model in predicting CO2 solubility in aqueous salt solutions. (c) 2015 American Institute of Chemical Engineers AIChE J, 61: 2286-2297, 2015
机译:CO2和电解质水溶液的相平衡对于各种化学,石油和环境相关的技术应用都很重要。在15 MPa的压力,323至423 K的温度以及1-6 mol kg(-1)的离子强度下测量了在CaCl2,MgCl2,Na2SO4和KCl水溶液中的CO2溶解度。根据测得的实验性CO2溶解度,扩展了先前为CO2-NaCl-H2O系统开发的逸度-活性热力学模型,以考虑到不同盐类对温度高达523 K,压力最大时对水溶液中CO2溶解度的影响。到150 MPa,盐浓度达到饱和。将不同模型与文献数据进行比较表明,在预测CO2在盐水溶液中的溶解度方面,建议的PSUCO2模型有明显的改进。 (c)2015年美国化学工程师学会AIChE J,61:2286-2297,2015

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