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Phase equilibrium measurements of structure II clathrate hydrates of hydrogen with various promoters |
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| Authors: | Alondra Torres TruebaLaura J. Rovetto Louw J. FlorusseMaaike C. Kroon Cor J. Peters |
| Affiliation: | a Delft University of Technology, Faculty of Mechanical, Maritime and Materials Engineering, Department of Process & Energy, Section Process Equipment, Leeghwaterstraat 44, 2628 CA Delft, Netherlands b Eindhoven University of Technology, Department of Chemical Engineering and Chemistry, Separation Technology Group, Den Dolech 2, 5612 AZ Eindhoven, Netherlands c The Petroleum Institute, Chemical Engineering Department, P.O. Box 2533, Abu Dhabi, United Arab Emirates |
| Abstract: | Phase equilibrium measurements of single and mixed organic clathrate hydrates with hydrogen were determined within a pressure range of 2.0-14.0 MPa. The organic compounds studied were furan, 2,5-dihydrofuran, tetrahydropyran, 1,3-dioxolane and cyclopentane. These organic compounds are known to form structure II clathrate hydrates with water. It was found that the addition of hydrogen to form a mixed clathrate hydrate increases the stability compared to the single organic clathrate hydrates. Moreover, the mixed clathrate hydrate also has a much higher stability compared to a pure hydrogen structure II clathrate hydrate. Therefore, the organic compounds act as promoter materials. The stabilities of the single and mixed organic clathrate hydrates with hydrogen showed the following trend in increasing order: 1,3-dioxolane < 2,5-dihydrofuran < tetrahydropyran < furan < cyclopentane, indicating that both size and geometry of the organic compound determine the stability of the clathrate hydrates. |
| Keywords: | Clathrate hydrate Structure II Hydrogen Cyclopentane Furan 2,5-Dihydrofuran Tetrahydropyran 1,3-Dioxolane Phase equilibrium |
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