Thermodynamic stability of structure H hydrates based on the molecular properties of large guest molecules

Kyoichi Tezuka, Tatsuhiko Taguchi, Saman Alavi, Amadeu K. Sum, Ryo Ohmura

Research output: Contribution to journalArticle

10 Citations (Scopus)


This paper report analyses of thermodynamic stability of structure-H clathrate hydrates formed with methane and large guest molecules in terms of their gas phase molecular sizes and molar masses for the selection of a large guest molecule providing better hydrate stability. We investigated the correlation among the gas phase molecular sizes, the molar masses of large molecule guest substances, and the equilibrium pressures. The results suggest that there exists a molecular-size value for the best stability. Also, at a given molecule size, better stability may be available when the large molecule guest substance has a larger molar mass.

Original languageEnglish
Pages (from-to)459-465
Number of pages7
Issue number2
Publication statusPublished - 2012 Feb



  • Clathrate hydrate
  • Molecular properties
  • Phase equilibria
  • Structure H

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

Cite this