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In Situ Observation of CO 2 Hydrate by X‐ray Diffraction
Author(s) -
TAKEYA SATOSHI,
HONDOH TAKEO,
UCHIDA TSUTOMU
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06852.x
Subject(s) - hydrate , diffusion , in situ , clathrate hydrate , x ray , diffraction , activation energy , analytical chemistry (journal) , chemistry , x ray crystallography , materials science , mineralogy , crystallography , thermodynamics , physics , optics , environmental chemistry , organic chemistry
A bstract :In situ observations of CO 2 hydrate growth using high‐energy X‐rays were done at high‐pressures and the growth rates of CO 2 hydrate from ice particles were measured. Assuming a model of diffusion through CO 2 hydrate layers, interdiffusion coefficients of CO 2 and H 2 O molecules were calculated between 233 K and 272.5 K. The diffusion coefficient at 263 K was 7.4 × 10 −16 m 2 /s, and the activation energy of diffusion was 0.40 eV.