Handbook of Natural Gas Transmission and Processing

Appendix 3: Physical Properties of Fluids

Table A3-1: Properties of Hydrocarbons and Common Gases (GPSA, 1987)

Component

Formula

Molecular weight

Boiling point ( F)(1 atm)

Vapor pressure at 100 F,(psia)

Critical

Liquid specific gravity (60/60 F)

Volume ratio, Scf gas per gal liquid

Pressure(psia)

Temperature( F)

Methane

CH 4

16.043

-258.73

(5000) [a]

666.4

-116.67

0.3 [a]

59.135 [a]

Ethane

C 2H 6

30.070

-127.49

(800) [a]

706.5

89.92

0.35619 [c]

37.476 [c]

Propane

C 3H 8

44.097

-43.75

188.64

616.0

206.06

0.50699 [c]

36.375 [c]

iso-Butane

C 4H 10

58.123

10.78

72.581

527.9

274.46

0.56287 [c]

30.639 [c]c

n-Butane

C 4H 10

58.123

31.08

51.706

550.6

305.62

0.58401 [c]

31.790 [c]

iso-Pentane

C 5H 12

72.150

82.12

20.445

490.4

369.10

0.62470

27.393

n-Pentane

C 5H 12

72.150

96.92

15.574

488.6

385.8

0.63112

27.674

n-Hexane

C 6H 14

86.177

155.72

4.960

436.9

453.6

0.66383

24.371

n-Heptane

C 7H 16

100.204

209.16

1.620

396.8

512.7

0.68820

21.729

n-Octane

C 8H 18

114.231

258.21

0.537

360.7

564.2

0.70696

19.580

n-Decane

C 10H 22

142.285

345.48

0.061

305.2

652.0

0.73421

16.326

Nitrogen

N 2

28.013

-320.45

493.1

-232.51

0.80940 [d]

91.413 [c]

Oxygen

O 2

31.999

-297.33

731.4

-181.43

1.1421 [d]

112.93 [c]

Carbon

CO 2

44.010

-109.26 [b]

1071

87.91

0.81802 [c]

58.807 [c]

dioxide

Hydrogen

H 2S

34.08

-76.50

394.59

1300

212.45

0.80144 [20]

74.401 [21]

sulfide

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