Indexed by:Conference Paper

Date of Publication:2014-01-01

Included Journals:CPCI-S

Volume:61

Page Number:513-522

Key Words:Dynamics simulation; Growth kinetics from ice powder; Diffusion coefficient; Methane hydrate

Abstract:Based on the single ice particles shrinking core model, the authors simulated the kinetic of gas hydrates formation from ice powders by the improved rate of volume ice-to-hydrate transformation that considered the volume expansion and consolidation of the sample during hydrate formation. The comparsion of the degree of hydrate formation between the calculated and the measured was conducted. Gas hydrates grown at gas-ice interfaces were a submicron porous structure. The pore structure provides the diffusion for gas molecules through the hydrate shell in reactions. And the diffusion plays an important role in this process of the reaction. In comparison with the experimental data, the reasonability of the model is verified. The curve of the reaction degree with time in different temperatures and initial pressures calculated in this paper by our programs has a good agreement with measured value. (C) 2014 Published by Elsevier Ltd.