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Yohan Lee

GEOMAR Helmholtz Centre for Ocean Research Kiel


My research interest is primarily focused on the exchange of methane (CH4) with carbondioxide (CO2) in natural gas hydrate reservoirs for CH4 recovery and CO2 sequestration. Natural gas hydrate production methods are not established yet, and the existing methods are all dissociation-based methods. A weakening of sediments caused by hydrate dissociation can lead to destabilization of sediments and subsequent seafloor subsidence. The replacement method can circumvent potential geo-hazards by exchanging hydrocarbons with external CO2 without hydrate dissociation and sequester CO2 additionally. My research includes the investigation on the thermodynamic stability, physicochemical properties, and thermal behavior of clathrate hydrates that occur in nature, and the influence of guest-exchange on those aspects above to examine a possible structural transition and reveal the replacement mechanism.


Tel.: +49 431 600-1405