(399f) Spectroscopic Monitoring of Dissolved Carbon Dioxide for Ccus

Decarbonization of the energy industry is an environment driven requirement. A sustained expansion and deployment of large-scale carbon capture, utilization and storage (CCUS), is needed to address this challenge, at least partly. Still, several technical barriers remain to be overcome for CCUS technologies to have commercial gains in field. CO₂ Geological storage (CGS) refers to long-term storage in suitable geological sites. Since CGS effectiveness is contingent upon developing miscibility through partitioning into water, this work is motivated by the need to reliably monitor dissolved CO2 under reservoir conditions of temperature and pressure. Although methods such as attenuated total reflection (ATR) have been proposed, a universal and reliable sensor for field application is not available. We approach this question by focusing on the use of spectroscopic techniques, particularly Raman Spectroscopy, in order to identify multiple gas components in aqueous. The proposed system complements the prevalent transmission infrared (IR) measurements and addresses some of their limitations. It can support continuous monitoring and quantitative identification of CO2 over a broad range of ambient conditions.We propose Raman spectroscopy-based sensor system for translating molecular interactions into molar concentrations. We propose the utility and feasibility of field deployment of our sensing system in aquifer reservoir CO2 injection projects. We also review a possible use-cases of monitoring system.