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

Table 8

Experimental [19] and predicted/calculated solubility of propane in pure water being in equilibrium with gas hydrates (liquid water-hydrate equilibrium) [4].

𝑇/K	𝑃/MPa	Experimental [19] propane solubility/mole fraction (×10^4)	Predicted/calculated propane solubility using ANN algorithm/mole fraction (×10^4)	AD%	Predicted propane solubility using thermodynamic model/mole fraction (×10^4)^†	AD%
274.16	0.301	1.440^∗	1.45	0.7	1.34	6.9
274.23	0.253	1.439	1.46	1.5	1.32	8.3
274.33	0.358	1.546	1.47	4.9	1.54	0.4
275.20	0.302	1.572	1.56	0.8	1.54	2.0
275.20	0.352	1.572	1.56	0.8	1.79	13.9
276.16	0.355	1.642^∗∗	1.66	1.1	1.37	16.6

^∗Data used for testing.
^∗∗Data used for validation (the remaining data were used for training).
^†The vapor pressure of the empty hydrate lattice in the thermodynamic model for propane hydrate was slightly tuned.