TY - JOUR
T1 - Influence of supercritical CO2 on the mobility and desorption of trace elements from CO2 storage rock sandstone and caprock shale in a potential CO2 sequestration site in Taiwan
AU - Jean, Jiin Shuh
AU - Hsiang, Hsing I.
AU - Li, Zhaohui
AU - Wong, Ciao Ling
AU - Yang, Huai Jen
AU - Yang, Kenn Ming
AU - Wang, Chien Li
AU - Lin, Huan Wen
AU - Kuo, Chun Chih
N1 - Funding Information:
The authors thank the Ministry of Science and Technology- Taiwan for financial support of this research (Grant no. MOST 103-3113-E006-012). The authors are grateful to Mr. Chia-Chuan Chou and Pu-Yu Wu of Exploration and Development Research Institute, China Petroleum Corporation in Miaoli, Taiwan for assisting us in collecting formation water and to Geology Core Repository of China Petroleum Incorporation for helping us collect sandstone and shale core samples. Special thanks are given to Mr. Wen-Chin Guo (Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan) for XRD analysis.
Publisher Copyright:
© Taiwan Association for Aerosol Research.
PY - 2016/7
Y1 - 2016/7
N2 - Excess carbon dioxide emission was considered as the most important cause of increased trend of global warming. Significant amounts of research were devoted to the reduction of CO2 emission and CO2 sequestration. Sequestration of CO2 in empty oil reservoirs was considered as one of the most promising options. However, the effects of metal release and mobility as a result of CO2 injection were not studied in detail, particularly under super-critical CO2 (scCO2) conditions. In this study, the release of selected metals immersed in distilled water for varying amounts of time in the absence and presence of scCO2 was assessed in simulated conditions at 90°C and 24 MPa. Significant increases in dissolution of Fe, Sr, and Ba by 3, 8, and 24 times were found when the storage rock sandstone or caprock shale was immersed in DI water for different time period. However, in the presence of scCO2, the dissolution of these metals was reduced by 80% for Fe, suggesting permanent sequestration of scCO2 into carbonate minerals. The trend in changes of pore water chemistry in the sandstone and shale after being immersed in DI water showed dissolution of Sr-bearing mineral and precipitation of Ba-bearing mineral.
AB - Excess carbon dioxide emission was considered as the most important cause of increased trend of global warming. Significant amounts of research were devoted to the reduction of CO2 emission and CO2 sequestration. Sequestration of CO2 in empty oil reservoirs was considered as one of the most promising options. However, the effects of metal release and mobility as a result of CO2 injection were not studied in detail, particularly under super-critical CO2 (scCO2) conditions. In this study, the release of selected metals immersed in distilled water for varying amounts of time in the absence and presence of scCO2 was assessed in simulated conditions at 90°C and 24 MPa. Significant increases in dissolution of Fe, Sr, and Ba by 3, 8, and 24 times were found when the storage rock sandstone or caprock shale was immersed in DI water for different time period. However, in the presence of scCO2, the dissolution of these metals was reduced by 80% for Fe, suggesting permanent sequestration of scCO2 into carbonate minerals. The trend in changes of pore water chemistry in the sandstone and shale after being immersed in DI water showed dissolution of Sr-bearing mineral and precipitation of Ba-bearing mineral.
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U2 - 10.4209/aaqr.2015.12.0665
DO - 10.4209/aaqr.2015.12.0665
M3 - Article
AN - SCOPUS:84976555305
SN - 1680-8584
VL - 16
SP - 1730
EP - 1741
JO - Aerosol and Air Quality Research
JF - Aerosol and Air Quality Research
IS - 7
ER -