Hydrate Kinetics: The Main Problem in the Gas Hydrate Industrialization

Gas hydrates are known as one of the main problems in gas transportation lines from 1934 to now. The main researches in this field are related to the hydrate formation conditions and the effect of using inhibitors. From early 1990s, the main features of using gas hydrates in storage and transportation of natural gas and separation of gas mixtures were considered. Research shows that 1m 3 of gas hydrates can reserve 170m 3 of natural gas in standard conditions. Therefore, with respect to the operating conditions for production and storage, using gas hydrates for storage and transportation of natural gas with conventional methods (i.e., CNG and LNG) can be important from economic point of view. For designing gas hydrates production units, reliable kinetic and thermodynamic models for prediction of hydrate formation conditions in reactors, components composition and hydrate structure must be available. In this article, hydrates, types of its structure, formation conditions and required driving force for formation and different kinetic models are investigated. Then, kinetic models are studied and the best model is selected and simulated. Comparing the simulated results with experimental data shows that the kinetic model of Firoozabadi and Kashchiev (2003) with some modification has the best agreement with experimental data.

کلیدواژه ها:

Gas hydrates ، Kinetic ، Storage ، Transportation