Page 404 - Characterization and Properties of Petroleum Fractions - M.R. Riazi

QC: IML/FFX
P2: IML/FFX
P1: IML/FFX
June 22, 2007
AT029-Manual-v7.cls
AT029-Manual
AT029-09
384 CHARACTERIZATION AND PROPERTIES OF PETROLEUM FRACTIONS
Wax Precipitated, WT% of Total Oil Wax 30 T1: IML 14:25
[N-N S + 1] components

th
th
N and (N-1) components
CPT
th
N components
0
200 400
Temperature, K
FIG. 9.17—Demonstration of multisolid-phase model for calculation
of cloud-point temperature and wax precipitation for a typical crude
oil. Courtesy of Lira-Galeana et al. [43].
--`,```,`,``````,`,````,```,,-`-`,,`,,`,`,,`---
and at high pressures, the effect of pressure is opposite and multisolid-phase model are closer to the cloud point of the
an increase in pressure will cause an increase in the CPT as crude. As it was shown in Table 3.30, the pour point tempera-
shown in Fig. 9.21. ture is usually greater than the cloud point for most crude oils.
Values of WAT calculated from the solid-solution model are As discussed earlier the method of characterization of oil and
usually closer to pour points of an oil, while values from C 7+ greatly affects result of calculations using this method.

TABLE 9.10—Compositions and cloud point temperature of some oils. Taken with permission from Ref. [43].
Oil No.
1 2 3 4 5 6
Comp mol% M Mol% M mol% M mol% M mol% M mol% M
C 1 0.056 0.000 0.016 0.000 0.000 0.021
C 2 0.368 0.113 0.144 0.100 0.173 0.254
C 3 1.171 1.224 1.385 0.118 1.605 1.236
i-C 4 0.466 0.645 1.174 0.106 1.150 0.588
n-C 4 1.486 2.832 3.073 0.099 3.596 2.512
i-C 5 0.961 1.959 2.965 0.162 3.086 1.955
n-C 5 1.396 3.335 3.783 0.038 4.171 3.486
C 6 2.251 5.633 7.171 0.458 7.841 6.842
C 7 6.536 88.8 9.933 92.8 11.27 94.1 2.194 90.8 11.11 94.1 12.86 92.2
C 8 8.607 101.0 10.75 106.3 12.41 107.0 2.847 106.5 13.43 105.4 13.99 105.4
C 9 4.882 116.0 7.179 120.0 7.745 122.0 1.932 122.3 9.420 119.0 9.195 119.0
C 10 2.830 133.0 6.561 134.0 5.288 136.0 5.750 135.0 5.583 135.0 6.438 134.0
C 11 3.019 143.0 5.494 148.0 5.008 147.0 4.874 149.0 4.890 148.0 5.119 148.0
C 12 3.119 154.0 4.547 161.0 3.969 161.0 5.660 162.0 3.864 162.0 4.111 161.0
C 13 3.687 167.0 4.837 175.0 3.850 175.0 6.607 176.0 4.300 175.0 4.231 175.0
C 14 3.687 181.0 3.700 189.0 3.609 189.0 6.149 189.0 3.272 188.0 3.682 188.0
C 15 3.687 195.0 3.520 203.0 3.149 203.0 5.551 202.0 2.274 203.0 3.044 202.0
C 16 3.079 207.0 2.922 216.0 2.300 214.0 5.321 213.0 2.791 216.0 2.255 214.0
C 17 3.657 225.0 3.072 233.0 2.460 230.0 5.022 230.0 2.311 232.0 2.405 230.0
C 18 3.289 242.0 2.214 248.0 2.801 244.0 4.016 244.0 1.960 246.0 2.006 245.0
C 19 3.109 253.0 2.493 260.0 2.100 258.0 4.176 256.0 1.821 256.0 1.770 257.0
38.4 423.0 17.0 544.0 14.33 418.0 38.80 473.0 11.33 388.0 12.00 399.0
C 20+
0.893 0.934 0.880 0.963 0.872 0.887
SG 20+
CPT, K 313.15 311.15 314.15 295.15 305.15 308.15
CPT, Calc. 312.4 308.2 316.0 299.3 301.2 309.5
Error, K 0.75 2.95 −1.85 −4.15 3.95 −1.35

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