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Kinetics of methane hydrate decomposition

✍ Scribed by H.C. Kim; P.R. Bishnoi; R.A. Heidemann; S.S.H. Rizvi

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 871 KB
Volume: 42
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(87)80169-0

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✦ Synopsis

The kinetics of methane hydrate decomposition was studied using a semibatch stirred-tank reactor. The decomposition was accompljshed by reducing the pressure OR a hydrate slurry in water to a value below the three-phase equilibrium pressure at the reactor temperature. The data were obtained at temperatures from 274 to 283 K and pressures from 0.17 to 6.97 MPa. The stirring rates were high enough to eliminate mass-transfer effects. Analysis of the data indicated that the decomposition rate was proportional to the particle surface area and to the difference in the fugacity of methane at the equilibrium pressure and the decomposition pressure. The proportionality constant showed an Arrhenius temperature

dependence. An estimate of the hydrate particle diameters in the experiments permitted the development of an intrinsic model for the kinetics of hydrate decomposition.

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