Abstract

The first generation High Pressure Automated Lag Time Apparatus (HP-ALTA MkI) was used to measure the nucleation curves of Structure I (sI) – forming carbon dioxide hydrate. The instrument applied a large number of constant cooling ramps to a quiescent water sample contained in a glass sample cell under isobaric conditions and recorded maximum achievable subcooling distributions. A survival curves was constructed from the measured data and a nucleation curve was derived from the survival curve using the model-independent method we had recently reported. It was found that the nucleation rate of carbon dioxide hydrate was significantly greater than that of pure methane hydrate or natural gas hydrates.

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