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Application of noble gas tracers to identify the retention mechanisms of CO2 migrated from a deep reservoir into shallow groundwater

Cited 4 time in wos
Cited 4 time in scopus
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Title
Application of noble gas tracers to identify the retention mechanisms of CO2 migrated from a deep reservoir into shallow groundwater
Other Titles
노블개스를 이용한 이산화탄소 저장 메커니즘의 추적
Authors
Ju, YeoJin
Gilfillan, Stuart M.V.
Lee, Seong-Sun
Kaown, Dugin
Hahm, Doshik
Lee, Sanghoon
Park, In-Woo
Ha, Seung-Wook
Park, Keyhong
Do, Hyun-Kwon
Yun, Seong-Taek
Lee, Kang-Kun
Subject
Science & Technology - Other Topics; Energy & Fuels; Engineering
Keywords
CCS; Monitoring; CO2 leakage; Noble gas tracing; Artificial tracer; Geochemical Monitoring
Issue Date
2020-06
Citation
Ju, YeoJin, et al. 2020. "Application of noble gas tracers to identify the retention mechanisms of CO2 migrated from a deep reservoir into shallow groundwater". INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 97(1): 10301-103015.
Abstract
Carbon Capture and Storage (CCS) is a valuable climate-mitigation technology, which offers the potential to cost-effectively reduce the emissions associated with the burning of fossil fuels. However, there is a potential risk of a small portion of the stored CO2 unintentionally migrating from a storage site to a shallow groundwater aquifer which is the final retaining zone for any migrated CO2 before it escapes to the atmosphere. Hence, it is imperative to identify the physical retention mechanisms of CO2 within a shallow aquifer. In this study 1.70x10(2) kg of CO2 and noble gas tracers (He, Ar and Kr) were continuously injected into a groundwater aquifer over 28 days with the aim of identifying the mechanisms and amount of CO2 retention. Among the tracers, Kr was found to be the earliest indicator of CO2 migration. The other tracers - He and Ar - arrived later and exhibited diluted signals. The diluted signals were attributed to degassing of the plume mass (1.6 % of CO2) during the early stages of CO2 migration. Diffusion accelerated the dilution of the lighter elements at the plume boundaries. Consequently, the clear relation of the noble gases with the CO2 proved that degassing and mixing primarily control the mass retention of CO2 in shallow groundwater, and the relative importance of these processes varies along the evolving path of migrating CO2.
URI
https://repository.kopri.re.kr/handle/201206/11870
DOI
http://dx.doi.org/10.1016/j.ijggc.2020.103041
Appears in Collections  
2020-2020, Variability of carbon pump and climate control in the Southern Ocean (20-20) / Park, Jisoo (PE20140)
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