Effect of Single Walled Carbon Nanotubes on Natural Gas Hydrate Formation

Ghozatloo, A.; Shariaty-Niassar, M.; Hassanisadi, M.

Effect of Single Walled Carbon Nanotubes on Natural Gas Hydrate Formation

Document Type : Research note

Authors

A. Ghozatloo ¹

M. Shariaty-Niassar ¹

M. Hassanisadi ²

¹ Transport Phenomena and Nanotechnology Laboratory, Department of Chemical Eng., University of Tehran, Tehran, Iran

² Nano Technology Research Center, Research Institute of Petroleum Industry (RIPI), West Blvd. Azadi Sport Complex, Tehran, Iran

Abstract

Using Co-Mo/MgO catalyst, single walled carbon nanotubes with a diameter of 2nm and a length of 10 μm were produced by chemical vapor deposition process and characterized by XRD, FTIR and SEM. Synthesized single-walled carbon nanotubes were dissolved in water to make a 1w% solution and stabilized by adding sodium dodecyl sulfate surfactant. The synthesized stabilized nanofluid was used in the gaseous hydrate formation at a temperature of 4˚C and pressure of 1000 psig. The results were compared with a water/surfactant control solution and it was found that carbon
nanotubes have reduced the duration of dissolution process by 58.9% and duration of the induction process by 75.5%. In addition, the amount of gas entrapment and stability of the gas in the hydrate were increased by 13.6% and 18.2%, respectively.

Keywords

Hydrate

Natural Gas

Single-Walled Carbon Nanotubes

Storage

Induction

Nanofluid