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Structural phase transitions of methane+ethane mixed-gas hydrate induced by 1,1-dimethylcyclohexane |
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| Authors: | Yuuki Matsumoto Hiroshi Miyauchi Takashi Makino Takeshi Sugahara Kazunari Ohgaki |
| Affiliation: | aDivision of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3, Machikaneyama, Toyonaka, Osaka 560-8531, Japan;bNational Institute of Advanced Industrial Science and Technology, 4–2–1, Nigatake, Miyagino, Sendai, Miyagi 983-8551, Japan |
| Abstract: | Methane+ethane+1,1-dimethylcyclohexane+water system was investigated by using Raman spectroscopy and isothermal phase equilibrium measurements under four-phase (gas+aqueous+large guest species+hydrate phases) equilibrium conditions at 288.15 K. The results suggest that three kinds of hydrate structures emerge at 288.15 K in the methane+ethane+1,1-dimethylcyclohexane+water system. The hydrate structure for this system changed from structure-H to structure-I via structure-II with increase in the mole ratio of ethane to methane. |
| Keywords: | Clathrate hydrate Raman spectroscopy Phase equilibria Phase change Fuel Energy |
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