Investigating on the Effect of Multi-Wall Carbon Nanotubes on the Formation of Natural Gas Hydrates

In this research, Multiwalled carbon nanotube (MWNT) was synthesized by chemical vapor deposition (CVD) method and the crystalline structure and dimensions were analyzed by XRD, FTIR and SEM analyzes. Then MWNT was used for formation of gas hydrates process to study of its effect. For this purpose, MWNT nanofluid of 1%wt. was prepared, which was used to obtain long-term stability of 1.5 g SDS surfactant. The obtained nanofluid was used for formation of natural gas hydrates containing 92.7% methane under the conditions of 1000 psi and 277K. A blank sample of 100 g distilled water and 1.5 g SDS was used to compare the results. The results show that use of MWNT in water induces natural gas hydrate formation by 57.5% and increases the storage capacity by 12.5%. This facilitates the conditions for the economics of hydrate technology in natural gas storage. In addition, the hydrate decomposition rate was reduced to 23.1%, which allows gas to be transported over longer distances.