Identification of conditions for increased methane storage capacity in sII and sH clathrate hydrates from Monte Carlo simulations

Nikolaos I. Papadimitriou, Ioannis N. Tsimpanogiannis, Ioannis Economou, Athanassios K. Stubos

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The current study utilizes Grand Canonical Monte Carlo simulations in order to calculate the amount of methane gas that can be stored inside hydrate structures sII and sH. The temperature and pressure conditions examined include those of interest to the industrial methane transportation, and the storage of methane in industrial settings or naturally-occurring hydrate deposits. To this purpose, the amount of methane stored in the different type of cages that form the hydrate structures is presented as Langmuir-type “absorption isotherms”, which are functions of pressure, temperature and hydrate structure. The obtained expressions are subsequently used in order to identify conditions (i.e., pressure temperature, hydrate promoter molecular weight, and cage fraction occupied by the hydrate promoter) where the considered hydrate structures can have storage capacities that are higher than the storage capacity of the more common sI methane hydrate. The results are also discussed in the context of storage capacities of natural hydrates that are under conditions of existing hydrate-bearing sediments.

Original languageEnglish
Pages (from-to)128-137
Number of pages10
JournalJournal of Chemical Thermodynamics
Volume117
DOIs
Publication statusPublished - 1 Feb 2018

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Keywords

  • Cavity occupancy
  • Gas storage capacity
  • Grand canonical Monte Carlo
  • Langmuir adsorption
  • Methane hydrate

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

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