Use of the thermodynamic promoter TBAB in synergy with kinetic promoters to improve the separation of CO2 + CH4 gas mixture by clathrate hydrate formation

Abstract : Gas separation by clathrate hydrate formation (GSHF) process is a new technique that could be used to upgrade biogas. In this process the CO2 is supposed to be captured into the solid phase while vapor will the enriched in CH4. The efficiency of such all process can be improved by using thermodynamic promoters in synergy with kinetic promoters. In this work, we performed a CO2 + CH4 gas separation study using the thermodynamic promoter tetrabutylammonium bromide (TBAB) and three kinetic promoters: sodium dodecyl sulfate (SDS), cetyl trimethyl ammonium bromide (CTAB), and dodecyl trimethyl ammonium bromide (DTAB). Experiments were realized using an instrumented high pressure reactor coupled to a gas chromatography analyzer instrument that allowed to monitor in real-time the gas composition evolution during gas hydrate formation. An experimental protocol exploiting the memory effect of hydrate crystallization was applied. The synergy of TBAB with the kinetic promoters SDS, CTAB, and DTAB was evaluated in terms of induction time, crystal growth rate and CO2 capture rate.
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01553090
Contributor : Didier Dalmazzone <>
Submitted on : Monday, July 3, 2017 - 2:16:31 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM

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  • HAL Id : hal-01553090, version 1

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Luiz Paulo Sales Silva, Didier Dalmazzone, Moncef Stambouli, Philippe Arpentinier, Antonio Trueba, et al.. Use of the thermodynamic promoter TBAB in synergy with kinetic promoters to improve the separation of CO2 + CH4 gas mixture by clathrate hydrate formation. 9th International Conference on Gas Hydrates, Colorado School of Mines, Jun 2017, Denver, United States. ⟨hal-01553090⟩

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