Development of Predictive Techniques for Estimating Liquid Water-Hydrate Equilibrium of Water-Hydrocarbon System

Table 5

Experimental [11] and predicted/calculated solubility of methane in pure water being in equilibrium with gas hydrates (liquid water-hydrate equilibrium) [4].

𝑇/K	𝑃/MPa	Experimental [11] methane solubility/mole fraction (×10^3)	Predicted/calculated methane solubility using ANN algorithm/mole fraction (×10^3)	AD%	Predicted methane solubility using thermodynamic model/mole fraction (×10^3)	AD%
276.2	5.0	1.33	1.29	3.0	1.40	5.3
277.9	5.1	1.59	1.45	8.8	1.55	2.5
279.9	5.1	1.75	1.66	5.1	1.75	0.0
280.5	5.1	1.86	1.72	7.5	1.81	2.7
276.4	10.1	1.33^∗	1.31	1.5	1.41	6.0
278.7	10.2	1.59	1.53	3.8	1.42	10.7
280.1	10.2	1.75	1.68	4.0	1.77	1.1
280.7	10.2	1.86	1.75	5.9	1.84	1.1
276.7	12.7	1.33	1.33	0.0	1.45	9.0
278.9	12.7	1.59^∗∗	1.55	2.5	1.65	3.8
280.4	12.7	1.75	1.71	2.3	1.80	2.9
281.1	12.7	1.86	1.79	3.8	1.88	1.1
276.9	14.3	1.33	1.35	1.5	1.46	9.8
279.2	14.4	1.59	1.58	0.6	1.68	5.7
280.6	14.3	1.75	1.73	1.1	1.82	4.0
281.7	14.3	1.88^∗∗	1.87	0.5	1.94	3.2

^∗Data used for testing.
^∗∗Data used for validation (the remaining data were used for training).