Nucleation curve of carbon dioxide hydrate

The first generation High Pressure Automated Lag Time Apparatus (HP-ALTA MU) was used to measure the nucleation curves of Structure l (sl) - 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. (C) 2019 The Authors. Published by Elsevier Ltd.