%0 Journal Article %1 Hu2007 %A Hu, Jiawen %A Duan, Zhenhao %A Zhu, Chen %A Chou, I-Ming %D 2007 %J Chemical Geology %K 2007 CO2 NaCl density overview water %N 3-4 %P 249 - 267 %R 10.1016/j.chemgeo.2006.11.011 %T PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: Assessment of experimental data and thermodynamic models %U http://dx.doi.org/10.1016/j.chemgeo.2006.11.011 %V 238 %X Evaluation of CO2 sequestration in formation brine or in seawater needs highly accurate experimental data or models of pressure-volume-temperature-composition (PVTx) properties for the CO2-H2O and CO2-H2O-NaCl systems. This paper presents a comprehensive review of the experimental PVTx properties and the thermodynamic models of these two systems. The following conclusions are drawn from the review: (1) About two-thirds of experimental data are consistent with each other, where the uncertainty in liquid volumes is within 0.5\%, and that in gas volumes within 2\%. However, this accuracy is not sufficient for assessing CO2 sequestration. Among the data sets for liquids, only a few are available for accurate modeling of CO2 sequestration. These data have an error of about 0.1\% on average, roughly covering from 273 to 642 K and from 1 to 35 MPa; (2) There is a shortage of volumetric data of saturated vapor phase. (3) There are only a few data sets for the ternary liquids, and they are inconsistent with each other, where only a couple of data sets can be used to test a predictive density model for CO2 sequestration; (4) Although there are a few models with accuracy close to that of experiments, none of them is accurate enough for CO2 sequestration modeling, which normally needs an accuracy of density better than 0.1\%. Some calculations are made available on www.geochem-model.org.

@article{Hu2007, abstract = {Evaluation of CO2 sequestration in formation brine or in seawater needs highly accurate experimental data or models of pressure-volume-temperature-composition (PVTx) properties for the CO2-H2O and CO2-H2O-NaCl systems. This paper presents a comprehensive review of the experimental PVTx properties and the thermodynamic models of these two systems. The following conclusions are drawn from the review: (1) About two-thirds of experimental data are consistent with each other, where the uncertainty in liquid volumes is within 0.5\%, and that in gas volumes within 2\%. However, this accuracy is not sufficient for assessing CO2 sequestration. Among the data sets for liquids, only a few are available for accurate modeling of CO2 sequestration. These data have an error of about 0.1\% on average, roughly covering from 273 to 642 K and from 1 to 35 MPa; (2) There is a shortage of volumetric data of saturated vapor phase. (3) There are only a few data sets for the ternary liquids, and they are inconsistent with each other, where only a couple of data sets can be used to test a predictive density model for CO2 sequestration; (4) Although there are a few models with accuracy close to that of experiments, none of them is accurate enough for CO2 sequestration modeling, which normally needs an accuracy of density better than 0.1\%. Some calculations are made available on www.geochem-model.org.}, added-at = {2011-01-19T18:06:23.000+0100}, author = {Hu, Jiawen and Duan, Zhenhao and Zhu, Chen and Chou, I-Ming}, biburl = {https://www.bibsonomy.org/bibtex/21277c08eb402839392d6d96ad12c38dc/thorade}, description = {ScienceDirect - Chemical Geology : PVTx properties of the CO2–H2O and CO2–H2O–NaCl systems below 647 K: Assessment of experimental data and thermodynamic models}, doi = {10.1016/j.chemgeo.2006.11.011}, interhash = {7774e04d9c811f19535166ff18d8d7c0}, intrahash = {1277c08eb402839392d6d96ad12c38dc}, issn = {0009-2541}, journal = {Chemical Geology}, keywords = {2007 CO2 NaCl density overview water}, number = {3-4}, pages = {249 - 267}, timestamp = {2011-07-21T11:08:15.000+0200}, title = {PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: Assessment of experimental data and thermodynamic models}, url = {http://dx.doi.org/10.1016/j.chemgeo.2006.11.011}, volume = 238, year = 2007 }