Page 182 - Characterization and Properties of Petroleum Fractions - M.R. Riazi

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AT029-Manual
162 CHARACTERIZATION AND PROPERTIES OF PETROLEUM FRACTIONS
used to obtain the coefficients for this property [6]. Values of
groups (≥C 10 ) in reservoir fluids and crude oils.
physical properties of SCN groups for C 6 to C 50 are tabulated TABLE 4.5—Coefficients of Eq. (4.7) for physical properties of SCN
in Table 4.6 [16]. Values of P c calculated from Eq. (4.7) Constants in Eq. (4.7)
are lower than those reported in other sources [10, 17, 18]. θ θ ∞ A b c %AAD
T b
As discussed in Chapter 2, the Lee–Kesler correlations SG 1080 6.97996 0.01964 2/3 0.4
0.1
3.56073
2.93886
0.07
1.07
are suitable for prediction of critical properties of heavy d 20 1.05 3.80258 3.12287 0.1 0.1
hydrocarbons. For this reason T c and P c are calculated from I 0.34 2.30884 2.96508 0.1 0.1
Eqs. (2.69)–(2.70) while d c is calculated through Eq. (2.98) T br = T b /T c 1.2 −0.34742 0.02327 0.55 0.15
and values. For heavy hydrocarbons Eq. (2.105) is used to es- −P c 0 6.34492 0.7239 0.3 1.0
0.0009
timate ω. Reported values of ω for heavy SCN are lower than −d c −0.22 −3.2201 −3.64457 1.0 0.05
1.4
0.1
−6.252
0.3
−ω
those estimated through Eq. (4.7). As discussed in Chapter σ 30.3 17.45018 9.70188 0.1 1.0
2 and recommended by Pan et al. [7], for hydrocarbons δ 8.6 2.29195 0.54907 0.3 0.1
with M > 800 it is suggested that ω = 2.0. Other properties Taken with permission from Ref. [16]. 3 3 1/2
are calculated through Eq. (4.7) or taken from Ref. [16]. Units: T b , T c in K; P c in bar; d 20 and d c in g/cm ; σ in dyne/cm; δ in (cal/cm ) .
TABLE 4.6—Physical properties of SCN groups.
Carbon
number M T b SG n 20 d 20 T c P c d c Z c ω σ δ
6 84 337 0.690 1.395 0.686 510.3 34.4 0.241 0.275 0.255 18.6 7.25
7 95 365 0.727 1.407 0.723 542.6 31.6 0.245 0.272 0.303 21.2 7.41
8 107 390 0.749 1.417 0.743 570.2 29.3 0.246 0.269 0.346 23.0 7.53
9 121 416 0.768 1.426 0.762 599.0 26.9 0.247 0.265 0.394 24.4 7.63
10 136 440 0.782 1.435 0.777 623.7 25.0 0.251 0.261 0.444 25.4 7.71
11 149 461 0.793 1.442 0.790 645.1 23.5 0.254 0.257 0.486 26.0 7.78
12 163 482 0.804 1.448 0.802 665.5 21.9 0.256 0.253 0.530 26.6 7.83
13 176 500 0.815 1.453 0.812 683.7 20.6 0.257 0.249 0.570 27.0 7.88
14 191 520 0.826 1.458 0.822 700.9 19.6 0.262 0.245 0.614 27.5 7.92
15 207 539 0.836 1.464 0.831 716.5 18.5 0.267 0.241 0.661 27.8 7.96
16 221 556 0.843 1.468 0.839 732.1 17.6 0.269 0.237 0.701 28.1 7.99
17 237 573 0.851 1.472 0.847 745.6 16.7 0.274 0.233 0.746 28.3 8.02
18 249 586 0.856 1.475 0.852 758.8 15.9 0.274 0.229 0.779 28.5 8.05
19 261 598 0.861 1.478 0.857 771.1 15.2 0.275 0.226 0.812 28.6 8.07
20 275 611 0.866 1.481 0.862 782.7 14.7 0.278 0.222 0.849 28.8 8.09
21 289 624 0.871 1.484 0.867 793.8 14.0 0.281 0.219 0.880 28.9 8.11
22 303 637 0.876 1.486 0.872 804.9 13.5 0.283 0.215 0.914 29.0 8.13
23 317 648 0.881 1.489 0.877 814.2 13.0 0.287 0.212 0.944 29.1 8.15
24 331 660 0.885 1.491 0.880 824.1 12.5 0.289 0.209 0.977 29.2 8.17
25 345 671 0.888 1.493 0.884 833.3 12.0 0.291 0.206 1.007 29.3 8.18
26 359 681 0.892 1.495 0.888 841.7 11.7 0.295 0.203 1.034 29.3 8.20
27 373 691 0.896 1.497 0.891 850.2 11.3 0.298 0.200 1.061 29.4 8.21
28 387 701 0.899 1.499 0.895 858.2 10.9 0.301 0.197 1.091 29.4 8.22
29 400 710 0.902 1.501 0.898 865.5 10.6 0.303 0.194 1.116 29.5 8.24
30 415 720 0.905 1.503 0.901 873.5 10.2 0.306 0.191 1.146 29.5 8.25
31 429 728 0.909 1.504 0.904 880.1 10.0 0.310 0.189 1.169 29.6 8.26
32 443 737 0.912 1.506 0.906 887.4 9.7 0.312 0.187 1.195 29.6 8.27
33 457 745 0.915 1.507 0.909 894.0 9.5 0.316 0.184 1.218 29.7 8.28
34 471 753 0.917 1.509 0.912 900.2 9.2 0.319 0.182 1.244 29.7 8.29
35 485 760 0.920 1.510 0.914 906.1 9.0 0.323 0.180 1.263 29.7 8.30
36 499 768 0.922 1.511 0.916 912.2 8.8 0.325 0.177 1.289 29.8 8.31
37 513 775 0.925 1.512 0.918 917.7 8.6 0.328 0.175 1.311 29.8 8.32
38 528 782 0.927 1.514 0.920 923.1 8.3 0.332 0.173 1.333 29.8 8.33
39 542 789 0.929 1.515 0.922 928.6 8.2 0.335 0.171 1.355 29.8 8.34
40 556 795 0.931 1.516 0.924 933.4 8.0 0.338 0.169 1.374 29.9 8.35
41 570 802 0.933 1.517 0.926 938.8 7.8 0.341 0.167 1.396 29.9 8.35
42 584 808 0.934 1.518 0.928 943.6 7.7 0.344 0.165 1.415 29.9 8.36
43 599 814 0.936 1.519 0.930 948.4 7.5 0.348 0.164 1.434 29.9 8.36
44 614 820 0.938 1.520 0.932 952.5 7.4 0.353 0.163 1.448 29.9 8.37
45 629 826 0.940 1.521 0.933 956.9 7.2 0.356 0.160 1.470 29.9 8.38
46 641 831 0.941 1.522 0.935 961.6 7.1 0.358 0.159 1.489 30.0 8.38
47 656 836 0.943 1.523 0.936 965.7 7.0 0.362 0.158 1.504 30.0 8.39
48 670 841 0.944 1.524 0.938 969.4 6.9 0.366 0.156 1.522 30.0 8.39
49 684 846 0.946 1.524 0.939 973.5 6.8 0.369 0.155 1.537 30.0 8.40
50 698 851 0.947 1.525 0.940 977.2 6.6 0.372 0.153 1.555 30.0 8.40
T c and P c are calculated from Lee–Kesler correlations (Eqs. 2.69–2.70); d c is calculated from Eq. (2.98) and Z c from Eq. (2.8). For
N C > 20, ω is calculated from Lee–Kesler, Eq. (2.105). All other properties are taken from Ref. [16] or calculated through Eq. (4.7)
3
3 1/2
for N C > 10. Units: T b , T c in K; P c in bar; d 20 and d c in g/cm ; σ in dyne/cm; δ in (cal/cm ) .
Taken with permission from Ref. [16].

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