A Graphical Alternating Conditional Expectation to Predict Hydrate Phase Equilibrium Conditions for Sweet and Sour Natural Gases

Table 6

Comparison between experimental and predicted hydrate formation pressures by using ACE model, CSMGem model [48], and HWHYD model [49] for CO₂-CH₄ system.

(kPa)	ACE model(kPa)	ARD%	CSMGem model(kPa)	ARD%	HWHYD model(kPa)	ARD%
4030	3953	1.90	3980	1.24	4180	3.72
5480	5248	4.24	5670	3.47	5860	6.39
8270	8083	2.26	8710	5.32	8840	6.89
2720	2716	0.15	2780	2.21	2970	9.19
3610	3373	6.57	3680	1.94	3940	9.14
6090	6737	10.62	7340	20.53	7620	25.12
2720	2757	1.37	2730	0.37	2850	4.78
3210	3160	1.56	3260	1.56	3420	6.54
4700	4834	2.86	5120	8.94	5390	14.68
AARD		3.50		5.06		9.67