TY - JOUR
T1 - Experimental evaluation of interactions in supercritical CO 2/water/rock minerals system under geologic CO2 sequestration conditions
AU - Lin, Hongfei
AU - Fujii, Takashi
AU - Takisawa, Reisuke
AU - Takahashi, Toru
AU - Hashida, Toshiyuki
N1 - Funding Information:
Acknowledgements This work was supported by the 21st Century COE Program Grant of the International COE of Flowing Dynamics from the Ministry of Education, Culture, Sports, Science and Technology of Japan. We thank Prof. N. Yamasaki of Graduate School of Environmental Studies, Tohoku University, for operation of hydrothermal apparatus. We are also grateful to Prof. T. Adschiri of Institute of Multidisciplinary Research for Advanced Materials, Tohoku University for providing valuable advice.
PY - 2008/4
Y1 - 2008/4
N2 - The hydrothermal autoclave experiments were conducted to simulate the interactions in the scCO2/water/rock minerals (quartz, biotite and granite) reaction systems using a Hastelloy C reaction cell at 100 °C. The dissolution characteristics of rock minerals and their surface texture alternation after hydrothermal treatment were examined by ICP-AES and SEM/EDX investigation, respectively. The results suggested that the hydrolysis of plagioclase phase should be mainly responsible for the elements dissolved from the Iidate granite samples. The dissolution was encouraged by the introduction of CO2 in the water/granite system, and generated an unknown aluminosilicate. No distinct chemical alternations occurred in the water-free scCO2/granite system, which indicated that rock minerals should be chemically stable in the water-free scCO2 fluids under the current mild experimental conditions. Both the highest concentration of Ca existing in the scCO2/vapor/granite system and the SEM observation results of calcite deposit, suggested that a meaningful CO2 minerals trapping process should be potential in the CO2-rich field during a short physicochemical interaction period.
AB - The hydrothermal autoclave experiments were conducted to simulate the interactions in the scCO2/water/rock minerals (quartz, biotite and granite) reaction systems using a Hastelloy C reaction cell at 100 °C. The dissolution characteristics of rock minerals and their surface texture alternation after hydrothermal treatment were examined by ICP-AES and SEM/EDX investigation, respectively. The results suggested that the hydrolysis of plagioclase phase should be mainly responsible for the elements dissolved from the Iidate granite samples. The dissolution was encouraged by the introduction of CO2 in the water/granite system, and generated an unknown aluminosilicate. No distinct chemical alternations occurred in the water-free scCO2/granite system, which indicated that rock minerals should be chemically stable in the water-free scCO2 fluids under the current mild experimental conditions. Both the highest concentration of Ca existing in the scCO2/vapor/granite system and the SEM observation results of calcite deposit, suggested that a meaningful CO2 minerals trapping process should be potential in the CO2-rich field during a short physicochemical interaction period.
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U2 - 10.1007/s10853-007-2029-4
DO - 10.1007/s10853-007-2029-4
M3 - Article
AN - SCOPUS:40849126925
SN - 0022-2461
VL - 43
SP - 2307
EP - 2315
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 7
ER -