Relative Cage-Occupancy of CO2-Methane Mixed Hydrate.

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  • Nakano Shinya
    Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University
  • Ohgaki Kazunari
    Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University

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Abstract

The composition and cage-occupancy of guest species in a CO2-methane mixed hydrate system are investigated by use of Raman spectroscopy. A single crystal of mixed gas hydrate shows the homogeneous mole fraction in equilibrium. The CO2 molecule is entrapped into the M-cage prior to the S-cage comparing to methane. The relative cage-occupancy of CO2 and methane in the structure-I hydrate lattice is scarcely affected by pressure condition.

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