Ionic liquids for the inhibition of gas hydrates. A review

The formation of gas hydrates is a major issue during the operation oil and pipelines, because cause plugging, thereby disrupting normal flows. A solution to inject hydrate inhibitors such as ionic liquids. Contrary classical inhibitors, liquids act both thermodynamic anti-agglomerates. Imidazolium-based have been found efficient for inhibition CO2 CH4 hydrates. For hydrates, N-ethyl-N-methylmorpholinium bromide showed an average depression temperature 1.72 K at 10 wt% concentration. induction time 1-ethyl-3-methyl imidazolium 36.3 h 1 1-ethyl-3-methyl-imidazolium chloride 4.80 40 wt%. mixed CH4, only quaternary ammonium salts studied. Tetramethyl hydroxide shifted liquid vapour equilibrium 1.56 wt%, while tetrabutylammonium 0.74