Solubility phenomena related to CO 2 capture and storage
Capturing CO 2 emissions from energy production and storing it under the ground is a potential CO 2 mitigation strategy that currently receives much attention. Both CO 2 capture and CO 2 storage are solubility problems. This paper reviews some important solubility aspects of CO 2 capture and storage...
| Published in: | Pure and Applied Chemistry |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Walter de Gruyter GmbH
2013
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1351/pac-con-12-10-10 https://www.degruyter.com/view/journals/pac/85/11/article-p2051.xml https://www.degruyter.com/document/doi/10.1351/pac-con-12-10-10/xml https://www.degruyter.com/document/doi/10.1351/pac-con-12-10-10/pdf |
| Summary: | Capturing CO 2 emissions from energy production and storing it under the ground is a potential CO 2 mitigation strategy that currently receives much attention. Both CO 2 capture and CO 2 storage are solubility problems. This paper reviews some important solubility aspects of CO 2 capture and storage that are often overlooked. Until very recently, there was not a single CO 2 solubility relationship that was both applicable in a wide temperature range and thermodynamically consistent with the enthalpy of solution of CO 2 . Furthermore, very often the relationship used for the first acidity constant of carbonic acid as a function of temperature is inconsistent with the relationship used for the solubility constant (or Henry constant) of CO 2 . The removal of CO 2 from a gas stream with amine solutions is usually viewed as a chemical reaction, which leads to the practice of heating to remove the CO 2 from the solvent. However, viewing this process as a solubility phenomenon suggests the practice of using vacuum to remove the CO 2 from the solvent, a potentially more efficient approach. |
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