Volumes of MgCl2(aq) at temperatures from 298 K to 623 K and pressures up to 30 MPa

A Pitzer-based characterization of aqueous magnesium chloride, calcium chloride and potassium iodide solution densities to high temperature and pressure

“…However, Wang et al [3] say that the "data of Obšil are in accordance with Ellis" and Mao and Duan [2] find that these datasets are consistent. This discrepancy may arise because the experimental error attributed by Obšil et al to their dataset [24] is smaller than can be warranted from a comparison involving many different sources. Alternatively, it may reflect different analytical perspectives: Obšil et al [24] were focussed on specific numerical characteristics of the datasets, while both Wang et al [3] and Mao and Duan [2] gave greater consideration to broader data trends, since their primary aim was to develop models to smooth the data and achieve a coherent (thermodynamically consistent) representation of the solution density over a range of conditions.…”

“…Indeed, in some instances investigators disagree even in their assessment. For example, Obšil et al [24] describe Ellis' MgCl 2 density data [36] as incompatible with their own. However, Wang et al [3] say that the "data of Obšil are in accordance with Ellis" and Mao and Duan [2] find that these datasets are consistent.…”

“…The agreement between different data sources at ambient temperature is evidently close to 0.5 cm 3 .mol −1 . At higher temperatures, the two main data sources are Obšil et al [24] and Al Ghafri et al [1]. At concentrations near 1.0 mol.kg −1 the difference between the measured apparent molar volume is approximately 1.0 cm 3 .mol −1 .…”

The P,V,T,x properties of binary aqueous chloride solutions up to T=573K and 100MPa

“…Over the last 20 years, more than 10 models have been reported to calculate the density (volume) of these aqueous chloride solutions [1][2][3]9,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Each model has its strength and weakness and here we mainly comment on the most competitive models for these binary aqueous chloride systems.…”

A high temperature equation of state for the H2O-CaCl2 and H2O-MgCl2 systems

“…The data for the MgCl 2 -H 2 O system (Table 2) are for different T-P ranges, except for the density data by Pepinov et al (1992) and Obsil et al (1997) with some overlap in the TP space. The molar volumes reported by Pepinov et al (1992) are about 1% higher than those by Obsil et al (1997). Other data for the MgCl 2 -H 2 O system up to 627 K have been summarized by Wang et al (1998b).…”