Carbon monoxide clathrate hydrates: Equilibrium data and thermodynamic modeling

Amir H. Mohammadi, Ross Anderson, Bahman Tohidi

    Research output: Contribution to journalArticlepeer-review

    276 Citations (Scopus)


    Carbon monoxide occurs in abundance throughout the cosmos, potentially in clathrate form, whereas on Earth, it forms a notable constituent of industrial flue gases. It has been proposed that hydrate technology could be used in CO2 separation from flue gases, and in subsea flue gas CO2 disposal. This - and the likely widespread occurrence of CO clathrates in the cosmos - means it is important that the phase behavior of CO hydrates is known. Here, we present experimental H-L-V (hydrate-liquid-vapor) equilibrium data for CO, CO-CO2, and CO-C3H8 (propane) clathrate hydrates. Data were generated by a reliable step-heating technique validated using measured data for CO2 and CH4 hydrates. Data for CO and CO-C3H8 clathrates have been used in the optimization of Kihara potential parameters for CO, reported here, facilitating the extension of a thermodynamic model to the prediction of CO hydrate equilibria. Model predictions are validated against independent experimental data for CO-CO 2 (structure I) systems, with good agreement being observed. © 2005 American Institute of Chemical Engineers'.

    Original languageEnglish
    Pages (from-to)2825-2833
    Number of pages9
    JournalAIChE Journal
    Issue number10
    Publication statusPublished - Oct 2005


    • Carbon monoxide
    • Clathrate hydrate
    • Equation of state
    • Experimental data
    • Model
    • Solid-fluid equilibria


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