Investigation on the kinetics of methane and carbon dioxide hydrates by using a modified kinetic model

• Hydrate formation kinetics for methane and carbon dioxide.
• Using parachor model for determining the interfacial composition of hydrate former.
• Using a kinetic model based on the interfacial composition of hydrate former.

In this work, the experimental and modeling investigations are conducted on the formation kinetics of methane and carbon dioxide hydrates. First, the hydrate formation experiments are done under constant temperature and volume conditions. The experiments are also conducted at 400, 600 and 800 rpm stirrer speeds in the presence of pure water. Subsequently, a kinetic model based on the mass transfer restriction of the gas through the liquid film of the gas–liquid interface has been applied for describing the kinetics of hydrate formation. This kinetic model is expressed in terms of the mole fraction of hydrate former in the gas–liquid interface. Also, in order to determine interfacial mole fraction of hydrate former, the parachor model in terms of interfacial properties is applied. The results of this model have been applied for analyzing the effects of different parameters on kinetics of hydrate formation.