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ANAXIMANDER Informe resumido

Project ID: EVK3-CT-2002-00068
Financiado con arreglo a: FP5-EESD
País: Greece

Experimental rig for the equilibria study of multi-component gas hydrates

An experimental setup was developed to study gas hydrate equilibria of multi-component gas at under-saturated conditions, i.e. where no free gas phase is present.

It consists of a thermally controlled autoclave vessel, which is magnetically stirred and equipped with suitable sampling ports for sampling water and gas. Two piston vessels provide the necessary amounts of multi-component gas and water, to maintain the pressure at the set value. A syringe pump controls the pressure of the piston vessels and transmits the pressure, volume of displacement and flow data to a computer.

A novel procedure for the formation of gas hydrates from a multi-component gas was designed and tested, in order to produce homogeneous hydrate phases. The effect of each one of the following parameters on thermodynamic stability was assessed: duration of formation, stirring rate, transition to another set of conditions.
The results reveal that a homogeneous hydrate phase can be produced in the laboratory at about 3 days.

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