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

Table 4

Experimental [10] 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 [10] 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%
274.35	3.5	1.170	1.14	2.6	1.26	7.7
275.45	3.5	1.203^∗	1.23	2.2	1.34	11.4
274.15	5.0	1.190	1.12	5.9	1.25	5.0
277.35	5.0	1.360	1.39	2.2	1.50	10.3
275.25	6.5	1.201	1.21	0.7	1.33	10.7
280.15	6.5	1.567^∗∗	1.68	7.2	1.77	13.0

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