Accelerated formation of THF-H2 clathrate hydrate in porous media

Dipendu Saha, Shuguang Deng

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Porous media were used to control the hydrogen clathrate particle size in order to accelerate its formation kinetics. Stoichiometric tetrahydrofuran- hydrogen binary clathrate hydrates with ∼1 wt % hydrogen loading formed in the mesopores of four porous media with median pore diameters of 49,65,100, and 226 À at 270 K and hydrogen pressure of 65 bar. The minimum formation time for the tetrahydrofuran-hydrogen binary clathrate hydrates was 27 min in a porous medium with a median pore diameter of 49 Å, which is 6-22 times faster than the tetrahydrofuran-hydrogen binary clathrate hydrates formed in the bulk ice. The clathrate formation time was found to increase with pore size of the porous media. A modified, shrinking core kinetic model was used to calculate the diffusivity of hydrogen in the tetrahydrofuranhydrogen binary clathrate hydrates. Hydrogen diffusivities in the tetrahydrofuran-hydrogen binary clathrate hydrates were found to be on the order of 1O-18-10~19 m2/s and decrease with increasing pore size or clathrate particle size.

Original languageEnglish (US)
Pages (from-to)8414-8418
Number of pages5
JournalLangmuir
Volume26
Issue number11
DOIs
StatePublished - Jun 1 2010
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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