TY - JOUR
T1 - Carbon dioxide solubility in aqueous solutions of sodium chloride at geological conditions
T2 - Experimental results at 323.15, 373.15, and 423.15K and 150bar and modeling up to 573.15K and 2000bar
AU - Zhaoa, Haining
AU - Fedkin, Mark V.
AU - Dilmore, Robert M.
AU - Lvov, Serguei N.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy, National Energy Technology Laboratory and the Energy Institute of College of Earth and Mineral Sciences at the Pennsylvania State University. We particularly thank Dr. Alfonso Mucci for reading the manuscript and providing many useful recommendations. We thank Dr. Nicolas Spycher, Dr. Nikolay N. Akinfiev, Dr. Larryn W. Diamond and one anonymous reviewer for carefully reading the manuscript and providing many constructive suggestions, which greatly improved the quality of the manuscript. We also thank Dr. Nikolay N. Akinfiev and Dr. Nicolas Spycher for suggestions and access to their computer codes. Thanks to OLI System Inc . for providing us the powerful OLI Studio 9.0.6 software package, and we also thank Dr. Andre Anderko for reading the manuscript and making very useful suggestions. Finally, we thank Mr. Derek Hall for useful discussions and reading the manuscript.
Funding Information:
This project was funded in part by the Department of Energy, National Energy Technology Laboratory, an agency of the United States Government, through a support contract with URS Energy & Construction, Inc. Neither the United States Government nor any agency thereof, nor any of their employees, nor URS Energy & Construction, Inc., nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/1/5
Y1 - 2015/1/5
N2 - A new experimental system was designed to measure the solubility of CO2at pressures and temperatures (150bar, 323.15-423.15K) relevant to geologic CO2sequestration. At 150bar, new CO2solubility data in the aqueous phase were obtained at 323.15, 373.15, and 423.15K from 0 to 6molkg-1NaCl(aq) for the CO2-NaCl-H2O system. A γ-ϕ (activity coefficient-fugacity coefficient) type thermodynamic model is presented for the calculation of both the solubility of CO2in the aqueous phase and the solubility of H2O in the CO2-rich phase for the CO2-NaCl-H2O system. Validation of the model calculations against literature data and other models (MZLL2013, AD2010, SP2010, DS2006, and OLI) show that the proposed model is capable of predicting the solubility of CO2in the aqueous phase for the CO2-H2O and CO2-NaCl-H2O systems with a high degree of accuracy (AAD <3.9%) at temperatures from 273.15 to 573.15K and pressures up to 2000bar. A comparison of modeling results with experimental values revealed a pressure-bounded "transition zone" in which the CO2solubility decreases to a minimum then increases as the temperature increases. CO2solubility is not a monotonic function of temperature in the transition zone but outside of that transition zone, the CO2solubility is decrease or increase monotonically in response to increased temperature. A link of web-based CO2solubility computational tool can be provided by sending a message to Haining Zhao at hzz5047@gmail.com.
AB - A new experimental system was designed to measure the solubility of CO2at pressures and temperatures (150bar, 323.15-423.15K) relevant to geologic CO2sequestration. At 150bar, new CO2solubility data in the aqueous phase were obtained at 323.15, 373.15, and 423.15K from 0 to 6molkg-1NaCl(aq) for the CO2-NaCl-H2O system. A γ-ϕ (activity coefficient-fugacity coefficient) type thermodynamic model is presented for the calculation of both the solubility of CO2in the aqueous phase and the solubility of H2O in the CO2-rich phase for the CO2-NaCl-H2O system. Validation of the model calculations against literature data and other models (MZLL2013, AD2010, SP2010, DS2006, and OLI) show that the proposed model is capable of predicting the solubility of CO2in the aqueous phase for the CO2-H2O and CO2-NaCl-H2O systems with a high degree of accuracy (AAD <3.9%) at temperatures from 273.15 to 573.15K and pressures up to 2000bar. A comparison of modeling results with experimental values revealed a pressure-bounded "transition zone" in which the CO2solubility decreases to a minimum then increases as the temperature increases. CO2solubility is not a monotonic function of temperature in the transition zone but outside of that transition zone, the CO2solubility is decrease or increase monotonically in response to increased temperature. A link of web-based CO2solubility computational tool can be provided by sending a message to Haining Zhao at hzz5047@gmail.com.
UR - http://www.scopus.com/inward/record.url?scp=84916896745&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916896745&partnerID=8YFLogxK
U2 - 10.1016/j.gca.2014.11.004
DO - 10.1016/j.gca.2014.11.004
M3 - Article
AN - SCOPUS:84916896745
VL - 149
SP - 165
EP - 189
JO - Geochmica et Cosmochimica Acta
JF - Geochmica et Cosmochimica Acta
SN - 0016-7037
ER -