Table 1: Constant parameters of CH4 and CO2 (Sloan and Koh 2008, 223)

Constant parameters CH4 CO2

A 1.63636 9.0242

B 0 0

C 0 0

D 31.6621 -207.033

E -49.3534 0

F -5.31E-6

4.66E-5

G 0 -6.992E-3

H 0 -2.89E-6

I 0.128525 -6.223E-3

J -0.78338 0

K 0 0

L 0 0

M 0 0.27098

N -5.3569 0

O 0 0

Q -2.3E-7

8.82E-5

R -2.0E-8

2.55E-6

S 0 0

Correlation Coefficient, R2

0.999 0.996

Table 2: Hydrate phases boundaries for common gas components (John 2003, 34)

Q1: I-Lw-H-V Q2: Lw-LHC-V-H

T(C) P(MPa) T(C) P(MPa)

Methane -0.3 2.563 No Q2

Carbon dioxide -0.1 1.256 9.8 4.499

List of symbols and abbreviation

Q1 - Lower Quadruple Point Q2 - Upper Quadruple Point Lw - Water Liquid Phase H - Hydrate Phase V - Vapor Phase LHC - Hydrocarbon Liquid Phase STEYX - Standard Error for the Line of Best Fit