Thermodynamic stability of structure-H hydrates of methylcyclopentane and cyclooctane helped by methane |
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| Institution: | 1. Department of Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, Republic of Korea;2. Climate Change Research Division, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea;3. Graduate School of Transportation, Korea National University of Transportation, Uiwang-si, Gyeonggi-do 437-763, Republic of Korea;4. Department of IT Convergence, Korea National University of Transportation, Chungju-si, Chungbuk 380-702, Republic of Korea;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. State Key Laboratory of Special Functional Waterproof Materials, Beijing Oriental Yuhong Waterproof Technology Co. Ltd, Beijing 101309, China;3. China National Offshore Oil Corporation Research Center, Beijing 100027, China;1. Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. CNOOC Research Institute, Beijing 100028, China;1. School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea;2. School of Chemical and Materials Engineering, Korea National University of Transportation, Chungbuk 27469, Republic of Korea |
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| Abstract: | The four-phase equilibria were measured for the methylcyclopentane+methane+H2O hydrate system (274.28–287.40 K, 1.75–9.34 MPa) and the cyclooctane+methane+H2O hydrate system (274.08–288.57 K, 1.60–9.33 MPa). Each structure-H hydrate has the lower equilibrium pressure than the pure methane structure-I hydrate in the temperature range of the present work. The isothermal equilibrium pressures of both methylcyclopentane and cyclooctane hydrates are slightly higher than that of methylcyclohexane hydrate. |
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