The Effect of Hydrophilic and Hydrophobic Multi-Wall Carbon Nanotubes on Methane Dissolution Rates in Water at Three Phase Equilibrium (V−Lw−H) Conditions
2014
Pasieka, James | Coulombe, Sylvain | Servio, Phillip
Presently, gas hydrates are being studied for their potential applications in technologies involving natural gas transportation, carbon dioxide sequestration, and component separation. In order to optimize their use, research has focused on finding hydrate-promoting agents and understanding how they work. One such promoter, multiwall carbon nanotubes (MWNTs), was found to enhance hydrate growth. The current study investigates the effects of adding plasma-functionalized hydrophilic MWNTs and as-produced hydrophobic MWNTs on the dissolution stage of methane hydrate formation. It was found that the addition of the hydrophilic MWNTs increased methane dissolution rates with an increase in MWNT loading. Furthermore, the hydrophobic MWNTs initially enhanced dissolution up until a concentration of 5 ppm, at which point the rates began to return to their nominal values. It was also found that the addition of either type of MWNT did not significantly affect the total number of moles of methane dissolved in the water.
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