Improving the Accuracy of Experimental Hydrate Equilibrium Point Determination: A Mini-Review

Abstract

Reliable gas hydrate equilibrium data is necessary to assess the severity of hydrate problems in the oil and gas industry and successfully implement the benefit of hydrate technologies in different areas such as hydrate-based CO2 capture and storage. Furthermore, the hydrate equilibrium point prediction models rely on tuning experimental data. In this mini-review, various techniques for hydrate dissociation point (DP) measurement either in the presence or absence of liquid water phase are discussed to improve the accuracy of the measurement. While both Visual and non-visual techniques can be used to measure hydrate DP, the non-visual isochore procedure is the most common technique. The stepwise heating procedure for hydrate dissociation to measure the DP is recommended due to its ability to improve accuracy and save time. However, it is essential to exercise caution during the data interpretation to avoid measuring inaccurate DP. In particular, considering the dissociation of various hydrate structures is crucial to enhance the accuracy of DP determination when employing non-visual techniques.