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

Table 2

Constants 𝐴-𝐷 in (18) [28].

Hydrate former	𝐴	𝐵/K	𝐶/K^−1	𝐷/K^−1	𝑇min	𝑇max
Methane	147.788	−5768.3	−52.2952	0.018616	273.15	373.15
Ethane	146.901	−5768.3	−51.8593	0.017410	273.15	343.15
CO2	21.6215	−1499.8	−5.64947	0.0002062	273.15	373.15

For the propane-water system the following equation was used: 𝐻_propane,𝑤(𝑇)=10⁻³×exp{552.648+0.078453×𝑇−(21334.4/𝑇)−85.89736×ln(𝑇)}.