CO2 solubility in aqueous solution of salts: Experimental study and thermodynamic modelling

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2024-08-07 DOI:10.1002/ghg.2298
Ramin Mousavi, Antonin Chapoy, Rod Burgass
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Abstract

There are many economic obstacles and complex engineering problems associated with CO2 capture and storage in saline aquifers that need to be addressed. Overcoming such challenges requires precise knowledge on the fluid phase equilibria of CO2-brine systems. Having accurate CO2 solubility data over a wide range of temperature and pressure can greatly assist in resolving these obstacles by improving the performance and accuracy of the thermodynamic modeling and subsequent CCS engineering success.

CO2 solubility in pure water and NaCl solutions has been widely studied in the literature, however, there is a lack of data on CO2 solubility at lower temperatures (below 298 K). Furthermore, limited phase equilibria data are available for CO2 solubility in CaCl2, MgCl2, and KCl solutions at elevated temperatures (i.e., T > 323.15 K).

In this work, the phase equilibria of CO2 and brine systems are investigated experimentally and theoretically. In this study, solubilities of CO2 in pure water and various concentrations of NaCl (10, 15, 20, and 22 wt%), KCl (10, 15, and 22 wt%), CaCl2 (7.5, 10, 15.7, and 23.4 wt%), and MgCl2 (6.7, 11, 18, and 29 wt%) aqueous solutions are reported. All CO2 solubilities were measures at 323.15, 373.15, and 423.15 K and over various pressure ranges, while solubilities in 10 and 20 wt% NaCl aqueous solutions were also measured over the temperature range of 263 to 298 K and pressures up to the hydrate dissociation pressure of each system. Equation of state modelling using the PC-SAFT and the Cubic Plus Association equations of state, is performed in the theoretical part of the study to validate the measured solubility data. © 2024 The Author(s). Greenhouse Gases: Science and Technology published by Society of Chemical Industry and John Wiley & Sons Ltd.

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二氧化碳在盐类水溶液中的溶解度:实验研究和热力学模型
在含盐含水层中捕获和封存二氧化碳有许多经济障碍和复杂的工程问题需要解决。要克服这些挑战,需要精确了解二氧化碳-盐水系统的流体相平衡。在广泛的温度和压力范围内掌握准确的二氧化碳溶解度数据,可以提高热力学建模的性能和准确性,并在随后的 CCS 工程中取得成功,从而极大地帮助解决这些障碍。此外,关于 CO2 在 CaCl2、MgCl2 和 KCl 溶液中的溶解度,在高温(即 T > 323.15 K)下的相平衡数据有限。本研究报告了二氧化碳在纯水和不同浓度的氯化钠(10、15、20 和 22 wt%)、氯化钾(10、15 和 22 wt%)、氯化钙(7.5、10、15.7 和 23.4 wt%)和氯化镁(6.7、11、18 和 29 wt%)水溶液中的溶解度。所有二氧化碳溶解度都是在 323.15、373.15 和 423.15 K 及不同压力范围内测量的,而 10 和 20 wt% 氯化钠水溶液中的溶解度也是在 263 至 298 K 的温度范围内以及每个系统的水合物解离压力以下的压力范围内测量的。研究的理论部分使用 PC-SAFT 和立方加联结状态方程进行状态方程建模,以验证测量的溶解度数据。© 2024 作者姓名温室气体:由化学工业协会和 John Wiley & Sons Ltd. 出版。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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