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Conference Papers Year : 2011

Carbon dioxide hydrates crystallisation in emulsion


Greenhouse gases emissions, like carbon dioxide, have been identified as major sources responsible for global warming. To reduce carbon dioxide emissions, capture process can be envisaged to extract CO2 from flue gases. In this work, the technology of CO2 separation and capture by gas hydrates crystallization is investigated. The principal barriers in developing this process are the necessary high conditions of formation (P, T), low hydrates formation rate, and separation efficiency. A promoter additive, the cyclopentane (CP), is proposed to improve the quality of the capture both at the thermodynamic and kinetic levels. An experimental study looking at the influence of the CP content on the kinetic of gas hydrates formation is presented. CP has been studied as a dispersed phase (emulsion) or as a secondary and clearly distinguished second phase. The rate of crystallization (gas consumption rate) reveals to be very different according to the CP dispersion. The system is oriented to form pure gas hydrates in one case, or mix CP-Gas hydrates in the other case. Finally, several equilibrium points of CP-CO2 hydrates are obtained. The results demonstrate that cyclopentane is a good additive which can remarkably decrease the gas hydrates formation pressure and enhances the formation rate.
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hal-00617479 , version 1 (29-08-2011)


  • HAL Id : hal-00617479 , version 1


Aurélie Galfré, Amara Fezoua, Yamina Ouabbas, Ana Cameirão, Jean-Michel Herri. Carbon dioxide hydrates crystallisation in emulsion. 7th International Conference on Gas Hydrates (ICGH 2011), Jul 2011, Edimbourg, United Kingdom. pp.442. ⟨hal-00617479⟩
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