CH/CH Group Clusters Doping Methane Hydrate Cages.

Methane hydrate is a crystalline compound with methane molecules as guest species trapped in host water cages. In this study, we detected methane hydrate with water cages doped by (C-H) clusters, (C-H) clusters, and (3C-H + 2HO) clusters using current spectroscopic techniques and differential scanning calorimetry (DSC). Methane molecules are trapped in the doped cages with type sI forming in nanoscale silica gel pores.

Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide.

To reveal the kinetic performance of gas molecules in hydrate growth, hydrate formation from pure CO, flue gas, and biogas was measured using in-situ Raman and macroscopic methods at 271.6 K. In the in-situ Raman measurements, Raman peaks of gases in the hydrate phase were characterised and normalised by taking the water bands from 2800 to 3800 cm as a reference, whose line shapes were not found to have a noticeable change in the conversion from Ih ice to sI hydrate.

Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments.

The large amounts of natural gas in a dense solid phase stored in the confined environment of porous materials have become a new, potential method for storing and transporting natural gas. However, there is no experimental evidence to accurately determine the phase state of water during nanoscale gas hydrate dissociation. The results on the dissociation behavior of methane hydrates confined in a nanosilica gel and the contained water phase state during hydrate dissociation at temperatures below the ice point and under atmospheric pressure are presented.