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Table 3

Coefficients (A ij ) for the calculation of the critical pressures.

C1 C2 C3 iC4 nC4 iC5 nC5 nC6 nC7 nC8 nC9 nC10 nC11 N2 CO2 H2S
C1 1 0.4493 1.7187 0.8000 1.1772 1.8921 2.1290 1.1844 1.4133 1.6876 0.8561 1.1680 0.6715 0.4848 0.4799 0.8429
C2 1.6543 1 1.8534 2.2280 1.5786 2.2176 1.6643 1.9969 1.8780 0.5850 0.8439 0.6767 1.0277 0.0273 1.3482 0.5759
C3 0.4168 0.4199 1 1.2763 1.1020 0.7668 1.2150 1.6577 2.0286 −0.1428 0.5810 0.4093 0.8462 0.1773 0.4761 1.9350
iC4 0.7662 0.5124 1.2328 1 0.6932 1.7257 0.9364 1.4341 2.2122 1.0330 0.9785 0.7599 1.0073 0.1109 0.7723 1.3543
nC4 0.6923 0.5345 0.8656 0.4870 1 2.4311 1.0916 1.2199 1.4788 0.7470 0.8565 0.8695 0.7881 0.3425 0.3072 1.1769
iC5 0.3707 −0.1767 0.2611 1.6818 2.4561 1 1.2725 0.8114 1.1113 0.6663 0.6085 0.6469 0.7920 0.4801 1.2830 1.4351
nC5 0.1613 0.4628 0.7668 0.4020 0.9669 0.6032 1 1.6196 1.2591 0.5566 0.7487 0.8992 0.7071 0.4044 1.0361 1.0719
nC6 0.3377 0.1743 0.6624 0.8900 0.3007 0.2835 1.6281 1 0.8953 0.8306 0.8254 0.9909 0.7949 0.2013 0.9734 0.5825
nC7 0.2890 0.3458 0.4363 1.6808 0.6179 0.3753 0.8607 0.4851 1 1.1314 1.2686 1.3125 1.0520 0.5291 −0.1096 0.2238
nC8 0.9964 0.7479 0.5508 1.0473 1.0303 0.7390 0.7238 0.8570 1.1182 1 1.1123 1.2436 0.9409 0.7953 0.5601 0.7651
nC9 0.7201 0.8508 0.7431 1.0007 1.0223 0.6767 0.8092 0.8282 1.1434 1.1214 1 1.2499 0.9269 0.7413 0.8359 0.7979
nC10 0.9754 0.6623 0.5661 0.7703 0.9964 0.6638 1.0018 1.0261 1.2367 1.2441 1.2433 1 0.9131 0.5848 0.6993 0.6204
nC11 0.7364 1.1445 0.9435 1.0027 0.7928 0.7842 0.7479 0.7812 0.9575 0.9448 0.9270 0.9148 1 0.7365 0.7209 0.7657
N2 1.6568 1.8121 2.1740 2.4239 2.5180 2.5666 2.4935 2.4670 2.4706 0.7987 0.7466 0.6831 0.7436 1 2.4106 4.6775
CO2 1.6649 0.6463 0.9745 1.4818 1.5878 2.1701 1.8296 2.1203 2.0246 0.5833 0.8012 0.7050 0.7262 −0.0435 1 1.4059
H2S 1.0680 1.1258 0.3952 0.0853 0.2068 0.5952 0.7155 1.5382 1.6385 0.7569 0.7904 0.5976 0.7629 −1.2622 0.6698 1

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