Phase Transition and Heat-Mass Transfer of Gas Hydrate in Sediment

Dear Colleagues,

With the development of worldwide energy consumption and the shifting of energy consumption structure, the energy crisis has become increasingly prominent, and the development and application of new energy sources have received more attention. Natural gas hydrate (NGH) is a solid ice-like substance composed of water and gas molecules (e.g. methane). As a clean energy resource with huge exploitation potential, NGH has generated considerable research interest. In the past few decades, gas hydrates stability zone (GHSZ) has been identified in the permafrost and seabed, which can satisfy the conditions of high pressure and low temperature for gas hydrates formation.

The NGH reservoir is a complex multi-phase and multi-component system composed of natural gas, water, hydrates, ice, sand, etc. The fundamental scientific issues involved in NGH exploitation not only include phase transition, the dynamic process of gas-liquid-solid multiphase seepage, and heat and mass transfer caused by NGH decomposition. These processes interact and restrict each other, which leads to the difficulty of NGH exploitation technology. Further progress on this front call for new exploitation techniques based on heat and mass transfer theory, as well as for an improved understanding of the meaning of entropy in complex systems. Contributions addressing any of these issues are very welcome.

This Special Issue aims to be a forum for the presentation of new and improved research of gas hydrate in sediment. In particular, the analysis and interpretation of phase transition and heat-mass transfer of during NGH formation and decompostion in sediment fall within the scope of this Special Issue.

Dr. Xiaosen Li
Dr. Yi Wang
Guest Editors

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