Liang Huiyong

Bio: Liang Huiyong is an academic researcher from Dalian University of Technology. The author has contributed to research in topics: Clathrate hydrate & Hydrate. The author has an hindex of 4, co-authored 8 publications receiving 128 citations.

New Approach for Determining the Reaction Rate Constant of Hydrate Formation via X-ray Computed Tomography

Abstract: Gas hydrates have attracted substantial attention in energy and environmental research as a medium for energy storage and transport, gas separation, and carbon dioxide sequestration. However, the f...

The Measurement of Permeability of Porous Media with Methane Hydrate

Abstract: In this article, the hydrates with different saturations were formed in porous media. The permeability of porous media with the presence of hydrate was measured. Comparison of experiment data with that obtained by theory models showed that the change of absolute permeability in the porous media with a hydrate saturation agreed with the capillary center filled model. The result indicates that hydrates can preferentially form in the capillary center rather than coat the inner wall.

Growth Kinetics and Gas Diffusion in Formation of Gas Hydrates from Ice

Abstract: Clathrate hydrates are ubiquitous in deep-sea sediments and the permafrost on earth, as well as abundant in interstellar environments. Despite many potential applications of gas hydrates for gas storage/transportation, carbon sequestration, and water treatment, the fundamental mechanism for gas hydrate nucleation and growth are still poorly understood due to the difficulty in spatial and temporal measurements that can probe specific structural properties. Here, high resolution measurements for xenon hydrate formation from ice spheres by X-ray computed tomography are reported. For the first time, the nucleation and growth of hydrates can be accurately and directly quantified from microscale measurements, resulting in new estimates for the intrinsic reaction rate constant of xenon hydrate formation, and the effective diffusion coefficient of xenon in the hydrate. The measured activation energy of hydrate formation is 71.11 kJ/mol and the diffusivity of xenon in hydrate ranges from 2.8 × 10–15 to 4.3 × 10–14 m2/s. These results are of fundamental value in developing a comprehensive understanding on the mechanism of gas hydrate formation, which is essential in their application for energy solutions and increasingly important in astrophysical science.

Gas hydrates in sustainable chemistry

Abstract: Gas hydrates have received considerable attention due to their important role in flow assurance for the oil and gas industry, their extensive natural occurrence on Earth and extraterrestrial planets, and their significant applications in sustainable technologies including but not limited to gas and energy storage, gas separation, and water desalination Given not only their inherent structural flexibility depending on the type of guest gas molecules and formation conditions, but also the synthetic effects of a wide range of chemical additives on their properties, these variabilities could be exploited to optimise the role of gas hydrates This includes increasing their industrial applications, understanding and utilising their role in Nature, identifying potential methods for safely extracting natural gases stored in naturally occurring hydrates within the Earth, and for developing green technologies This review summarizes the different properties of gas hydrates as well as their formation and dissociation kinetics and then reviews the fast-growing literature reporting their role and applications in the aforementioned fields, mainly concentrating on advances during the last decade Challenges, limitations, and future perspectives of each field are briefly discussed The overall objective of this review is to provide readers with an extensive overview of gas hydrates that we hope will stimulate further work on this riveting field

Formation of porous gas hydrates from ice powders: Diffraction experiments and multistage model

Abstract: Gas hydrates grown at gas−ice interfaces were examined by electron microscopy and found to have a submicron porous structure. In situ observations of the formation of porous CH4- and CO2-gas hydrates from deuterated ice Ih powders were made, using time-resolved neutron diffraction on the high-flux diffractometer D20 (ILL, Grenoble) at different pressures and temperatures. For the first time neutron diffraction experiments were also performed with methane in hydrogenated samples. The isotopic differences between H2O and D2O are found insignificant concerning the clathrate formation kinetics. At similar excess fugacities, the reaction of CO2 was distinctly faster than that of CH4. The transient formation of the CO2-hydrate crystal structure II was also observed in coexistence with the usual type-I hydrate reaching a maximum of 5% after 5 h of the reaction at 272 K. A phenomenological model for the kinetics of the gas hydrate formation from ice powders is developed with special account of sample consolidatio...