Xiao-Sen Li

TL;DR: In this paper, the micro-mechanism and efficiency of CH4-CO2 replacement from natural gas hydrates were investigated by a series of experiments with pure CO2, CO2/N 2, CO 2/H2 and CO 2 /He gas mixtures under 4.5 MPa and 274.0 K.

TL;DR: In this paper, the effects of the flow rates of cyclopentane and methane gas, operating pressure, and experimental temperature on the formation of cyclogenane-methane hydrate were investigated using a novel bubble column reactor.

TL;DR: In this paper, the mechanism of CH4 replacement in hydrates by CO2 was investigated by analyzing the Raman and NMR spectra of the NGH hydrate and showed that the CO2 and CH4 hydrates coexist in a type of structure I (sI) and there is no structure transformation during the replacement.

TL;DR: In this paper, the effects of the fugacity difference, the water-gas ratio, and the volume of the vessel on the formation rate of methane hydrate are studied. But the results show that the formation rates are disproportionate to the fugacious differences but in proportion to the volume and the change of the initial gas-water ratio has little effect on the rate of hydrate formation.

TL;DR: Based on the hydrate conditions of the South China Sea, hydrate samples were synthesized in the Cubic Hydrate Simulator (CHS) and the Pilot-Scale Hydrates Simulator (PHS), and hydrate dissociation experiments by depressurization with single horizontal well were carried out.