Melting of tetrahydrofuran hydrate in pores: An investigation by low-field NMR relaxation

Transverse relaxation times T2 spectra for models of thawing hydrate-bearing sediment have been studied in this work. The samples were prepared from aqueous THF solution and powders of quartz microspheres or their mixtures with kaolin. It was shown that individual bands in the spectra of T2 times are traced, they correspond to proton relaxation in solid hydrate, aqueous solution of THF and to a thin layer of liquid located at the boundary between hydrate and solid particles. It was experimentally established that the low-field NMR may be applied to study the formation/melting kinetics of THF hydrates in porous media and as a tool to investigate phase transformations in porous media. •Low-field NMR relaxation was used to study the model hydrate-bearing sediments.•The model hydrate-bearing sediments contained tetrahydrofuran hydrate.•Intensity of liquid band may be used to study formation/melting kinetics such models.•Intensity of solid hydrate band is temperature-dependent.•The method may be used to detailed study of hydrate melting in the samples.