Laser-Induced Breakdown Spectroscopy (LIBS) of a High-Pressure CO2–Water Mixture: Application to Carbon Sequestration

• DOI: 10.1366/13-07383
• Publication Date: 2014-08-26T21:15:23Z
• Authors: Christian Goueguel; Dustin L. McIntyre; Jagdish P. Singh; Jinesh Jain; Athanasios K. Kar...
• Keywords: Laser-induced breakdown spectroscopy; Brine; Emission intensity

Geologic carbon storage in deep saline aquifers is considered a feasible and possible approach of mitigating the problem increasing greenhouse gas emissions. However, there are latent risks which dioxide (CO 2 ) could migrate from formations to shallower aquifers. In event significant CO leakage an underground source drinking water, will dissolve thereby its acidity, potentially enhance solubility various aquifer constituents, including hazardous compounds, subsequently compromising groundwater quality due increased concentration aqueous metals. this paper we explore possibility detecting such by use laser-induced breakdown spectroscopy (LIBS). The experiments were conducted calcium chloride solution at three pressures 10, 50, 120 bar. To evaluate direct effect elevated on intensity emission lines (422.67 393.37 nm), also performed with pure nitrogen (N gas, offering large water contrast. We found that when presence , LIBS showed only modest decrease Ca 10 bar compared N . These results indicate viable tool for measuring brine/water contents high-pressure environment can be applied monitoring displaced brine migration.