Investigation of the Hydrate Formation Equilibrium Conditions of Natural Gas

Subject Areas : Polymer

Mohsen Kasaeezadeh ¹ , Alireza Azimi ²

1 - Department of Chemical engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
2 - Department of Chemical engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran

Received: 2018-06-04 Accepted : 2018-06-04 Published : 2018-07-01

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Abstract :

One of the main problems in oil recovery via the gas injection is the formation of hydrates in thelines. In order to prevent the formation of hydrate in these lines, which leads to the blockage andsometimes explosion, at first, the equilibrium formation conditions must be determined and then toprevent its formation by changing the thermodynamic conditions or by adding the inhibitors. In thisresearch, the hydrate formation for a natural gas sample has been studied under the variousthermodynamic conditions. For this purpose, a gas sample was taken from the natural gastransmission lines. Then, the conditions for the formation of gas hydrates were determined from theexperimental equations. Also, by constructing and launching a laboratory system, the experimentswere carried out using the Isochoric method and the hydrate formation conditions were determined.The experiments were done at a temperature range of 264 to 300 K and a pressure range of 5 to 45bar in the pure water. The results showed that, with increasing temperature, the equilibrium pressureof the hydrate formation increases and with increasing pressure, the equilibrium temperature ofhydrate formation is reduced.