Energies | |
Direct Observation of THF Hydrate Formation in Porous Microstructure Using Magnetic Resonance Imaging | |
Kaihua Xue1  Jiafei Zhao1  Yongchen Song1  Weiguo Liu1  Weihaur Lam1  Yiming Zhu1  Yu Liu1  Chuanxiao Cheng1  | |
[1] Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China; E-Mails: | |
关键词: hydrate; growth habit; porous microstructure; tetrahydrofuran; magnetic resonance imaging; | |
DOI : 10.3390/en5040898 | |
来源: mdpi | |
【 摘 要 】
The porous microstructure of hydrates governs the mechanical strength of the hydrate-bearing sediment. To investigate the growth law and microstructure of hydrates in porous media, the growth process of tetrahydrofuran (THF) hydrate under different concentration of THF solution is directly observed using Magnetic Resonance Imaging (MRI). The images show that the THF hydrate grows as different models under different concentration of THF solution (19%, 11.4% and 5.7% by weight) at 1°C. When the concentration is 19% (stoichiometric molar ratio of THF/H2O = 1:17), the THF hydrate grows as cementing model. However, with the decreasing concentration of THF, the growth model transfers from cementing model to floating model. The results show that the growth of the THF hydrate was influenced by the dissolved quantity of THF in the water. The extension of the observed behavior to methane hydrate could have implications in understanding their role in seafloor and permafrost stability.
【 授权许可】
CC BY
© 2012 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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RO202003190044764ZK.pdf | 774KB | download |