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Communication Dans Un Congrès Année : 2014

CO2 capture by using hydrates: 3) Sizing the gas/liquid transfer in bubble column

Résumé

The CO2 capture by using clathrates is a method which takes profit of the CO2 selectivity in gas hydrate to separate it from nitrogen, or other exhausting gases from gas combustion or coal combustion. The bottleneck is the operative pressure which still remains high and needs to be drop down to 0.5 MPa in order to compete with the reference case using Amines. After two national projects (SECOHYA, ACACIA) and a european program (iCAP), we tested different classes of thermodynamic additives, organic ones (water un soluble cyclopentane, water soluble THF) which form classical gas hydrates with structure SII, and ionic ones (Tetra-N-Butyl Ammonium Bromide, TBAB) which forms new types of structures. In this presentation, we comment results from batch experiments showing that the crystallization is limited by the gas/liquid transfer. Then, we present a method to evaluate the size of a bubbling column operating a separation from a TBAB-CO2 semi clathrate hydrate crystallization. We explain how to design the flow rates, and the volume of the column as a function of the pressure.
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Dates et versions

hal-01068486 , version 1 (25-09-2014)

Identifiants

  • HAL Id : hal-01068486 , version 1

Citer

Jérôme Douzet, Aurélie Galfré, Pedro Brantuas, Jean-Michel Herri. CO2 capture by using hydrates: 3) Sizing the gas/liquid transfer in bubble column. The 8th International Conference on Gas Hydrates, Jul 2014, Pékin, China. pp.t4-14. ⟨hal-01068486⟩
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