Research Article
Solid-Liquid Phase Equilibria of the Quaternary System NaCl + NH4Cl + NaHCO3 + NH4HCO3 + H2O at 283.15 and 313.15 K
Table 4
Physicochemical properties in the quaternary system (NaCl + NH
4Cl + NaHCO
3 + NH
4HCO
3 + H
2O) at
T = 283.15, 313.15 K, and
= 0.1 MPa
a.
| No.b | Composition of liquid phase, 100 c | nD | ρ/g·cm−3 | Solid phasee | NaCl | NaHCO3 | NH4Cl | NH4HCO3 | Experimental value | Calculated value | Relative errord, (%) | Experimental value | Calculated value | Relative error, (%) |
| 283.15 K | 1, A | 26.41 | 0.43 | 0.00 | 0.00 | 1.3821 | 1.3834 | 0.09 | 1.20854 | 1.21093 | 0.20 | S + SB | 2 | 23.78 | 0.00 | 3.95 | 0.26 | 1.3857 | 1.3854 | −0.02 | 1.19978 | 1.19819 | −0.13 | S + SB | 3 | 20.07 | 0.00 | 9.78 | 0.24 | 1.3904 | 1.3891 | −0.09 | 1.18868 | 1.18684 | −0.15 | S + SB | 4, F1 | 18.95 | 0.00 | 12.48 | 0.38 | 1.3928 | 1.3921 | −0.05 | 1.18283 | 1.18737 | 0.38 | S + SB + A | 5 | 11.72 | 0.00 | 16.32 | 0.59 | 1.3890 | 1.3872 | −0.13 | 1.13848 | 1.14170 | 0.28 | A + SB | 6 | 6.92 | 0.00 | 21.28 | 1.17 | 1.3872 | 1.3886 | 0.10 | 1.11980 | 1.12222 | 0.22 | A + SB | 7, F2 | 6.01 | 0.00 | 24.19 | 1.82 | 1.3926 | 1.3929 | 0.02 | 1.12987 | 1.12756 | −0.20 | A + AB + S | 8, B | 18.34 | 0.00 | 12.62 | 0.00 | 1.3917 | 1.3908 | −0.07 | 1.17954 | 1.18081 | 0.11 | A + S | 9, C | 0.00 | 0.00 | 15.14 | 13.23 | 1.3855 | 1.3841 | −0.10 | 1.08540 | 1.10545 | 1.85 | A + B | 10 | 0.00 | 0.96 | 21.66 | 3.29 | 1.3859 | 1.3827 | −0.23 | 1.087480 | 1.09030 | 0.26 | A + B | 11, D | 0.00 | 5.08 | 0.00 | 10.76 | 1.3609 | 1.3639 | 0.22 | 1.09549 | 1.10377 | 0.76 | AB + SB | 12 | 0.00 | 1.99 | 1.15 | 12.57 | 1.3638 | 1.3638 | 0.00 | 1.09183 | 1.08075 | −1.01 | AB + SB | 13 | 0.00 | 4.57 | 6.72 | 3.98 | 1.3674 | 1.3648 | −0.19 | 1.09244 | 1.08736 | −0.47 | AB + SB | 14 | 2.45 | 0.00 | 8.28 | 6.01 | 1.3673 | 1.3666 | −0.05 | 1.09798 | 1.06906 | −2.63 | AB + SB | 15 | 5.11 | 0.00 | 15.34 | 2.51 | 1.3748 | 1.3777 | 0.21 | 1.10381 | 1.09535 | −0.77 | AB + SB | 16 | 5.32 | 0.00 | 17.71 | 2.17 | 1.3800 | 1.3815 | 0.11 | 1.10936 | 1.10288 | −0.58 | AB + SB | 17 | 6.06 | 0.00 | 23.03 | 2.09 | 1.3883 | 1.3914 | 0.22 | 1.12209 | 1.12548 | 0.30 | AB + SB |
| 313.15 K | 1, A′ | 26.11 | 0.98 | 0.00 | 0.00 | 1.3781 | 1.3777 | 0.03 | 1.19942 | 1.19055 | −0.74 | S + SB | 2 | 26.43 | 0.39 | 0.85 | 0.00 | 1.3784 | 1.3790 | −0.05 | 1.19351 | 1.19313 | −0.03 | S + SB | 3 | 24.85 | 1.25 | 2.47 | 0.00 | 1.3806 | 1.3806 | 0.00 | 1.18941 | 1.18918 | −0.02 | S + SB | 4 | 22.33 | 1.65 | 6.99 | 0.00 | 1.3845 | 1.3852 | −0.05 | 1.18044 | 1.18451 | 0.34 | S + SB | 5 | 20.91 | 1.98 | 8.55 | 0.00 | 1.3857 | 1.3859 | −0.02 | 1.17921 | 1.17928 | 0.01 | S + SB | 6, F1′ | 15.44 | 3.10 | 18.30 | 0.00 | 1.3966 | 1.3964 | 0.02 | 1.16432 | 1.17014 | 0.50 | S + SB + A | 7 | 14.52 | 0.00 | 21.61 | 1.08 | 1.3966 | 1.3970 | −0.03 | 1.16495 | 1.16361 | −0.12 | SB + A | 8 | 14.37 | 0.00 | 21.82 | 1.04 | 1.3967 | 1.3970 | −0.02 | 1.16462 | 1.16291 | −0.15 | SB + A | 9 | 11.77 | 0.00 | 23.81 | 1.41 | 1.3957 | 1.3960 | −0.02 | 1.15107 | 1.14978 | −0.11 | SB + A | 10, F2′ | 4.25 | 0.00 | 31.98 | 5.02 | 1.4015 | 1.4030 | −0.11 | 1.13739 | 1.12932 | −0.71 | SB + AB + A | 11, B′ | 15.05 | 0.00 | 20.00 | 0.00 | 1.3954 | 1.3927 | 0.20 | 1.15755 | 1.15869 | 0.10 | S + A | 12, C′ | 0.00 | 0.00 | 29.18 | 10.89 | 1.3993 | 1.3986 | 0.05 | 1.10419 | 1.11075 | 0.59 | AB + A | 13, D′ | 0.00 | 6.17 | 0.00 | 26.97 | 1.3797 | 1.3805 | −0.05 | —f | 1.11204 | — | AB + SB | 14 | 4.45 | 6.21 | 0.00 | 21.31 | 1.3803 | 1.3798 | 0.04 | — | 1.12491 | — | AB + SB | 15 | 4.55 | 6.54 | 0.00 | 29.95 | 1.3981 | 1.3977 | 0.03 | — | 1.16039 | — | AB + SB |
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aStandard uncertainties u, u ( T) = 0.1 K, u ( p) = 0.005 MPa (ambient pressure change), ur ( (NaCl)) = 0.003, ur ( (NaHCO 3)) = 0.003, ur ( (NH 4Cl)) = 0.003, ur ( (NH 4HCO 3)) = 0.003, u ( ρ) = 1.0 mg·cm −3, u ( nD) = 0.0010. bThe points correspond to those in Table 2c, mass fraction. dRelative error = 100% × (calculated value−experimental value)/experimental value. eA: NH 4Cl, S: NaCl, AB: NH 4HCO 3, SB: NaHCO 3. f—, not determined. |