Table 2 Calculated molal concentrations of major species in the KCl-H2O system under supercritical conditions
KCl concentration, temperature, and pressure | pH | pOH | log mK+ | log mCl- | log mKCl° | log mHCl° | log mKOH° |
|---|---|---|---|---|---|---|---|
0.01 mol KCl, 400°C, 550 bar | 5.7 | 5.6 | -2.0 | -2.0 | -3.1 | -5.4 | -5.3 |
0.1 mol KCl, 400°C, 550 bar | 5.0 | 6.3 | -1.1 | -1.1 | -1.7 | -4.1 | -4.3 |
0.75 mol KCl, 400°C, 550 bar | 4.5 | 6.8 | -0.23 | -0.23 | -0.80 | -3.2 | -5.9 |
0.5 mol KCl, 410°C, 550 bar | 4.6 | 6.7 | -0.41 | -0.41 | -0.94 | -3.3 | -3.2 |
1.0 mol KCl, 410°C, 550 bar | 4.5 | 6.8 | -0.096 | -0.096 | -0.71 | -3.1 | -2.4 |
1.0 mol KCl, 450°C, 550 bar | 5.0 | 7.0 | -0.067 | -0.067 | -0.85 | -2.8 | -0.16 |
0.5 mol KCl, 460°C, 550 bar | 5.0 | 6.9 | -0.43 | -0.43 | -0.90 | -2.8 | -1.4 |
0.01 mol KCl, 500°C, 550 bar | 5.7 | 6.2 | -2.3 | -2.3 | -2.4 | -4.0 | -5.2 |
0.1 mol KCl, 500°C, 550 bar | 5.2 | 6.7 | -1.5 | -1.5 | -1.2 | -2.8 | -4.6 |
1.0 mol KCl, 500°C, 800 bar | 4.6 | 7.3 | -0.59 | -0.59 | -0.14 | -1.8 | -3.0 |
1.5 mol KCl, 500°C, 800 bar | 4.6 | 7.3 | -0.38 | -0.38 | 0.026 | -1.6 | -2.5 |
0.5 mol KCl, 510°C, 750 bar | 4.9 | 7.2 | -1.1 | -1.1 | -0.39 | -2.0 | -4.0 |