期刊
CHEMICAL ENGINEERING & TECHNOLOGY
卷 35, 期 10, 页码 1751-1758出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201100275
关键词
CO2 storage; CO2-hydrate; Heat transfer; Hydrate formation
Sub-seabed geological storage of CO2 in the form of gas hydrate is attractive because clathrate hydrate stably exists at low temperature and high pressure, even if a fault occurs by diastrophism like a big earthquake. For the effective design of the storage system it is necessary to model the formation of CO2-hydrate. Here, it is assumed that the formation of gas hydrate on the interface between gas and water consists of two stages: gas diffusion through the CO2-hydrate film and consequent CO2-hydrate formation on the interface, between film and water. Also proposed is the presence of a fresh reaction interface, which is part of the interface between the gas and aqueous phases and not covered with CO2-hydrate. Parameters necessary to model the hydrate formation in sand sediment are derived by comparing the results of the present numerical simulations and the measurements in the literature.
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