Sun, R., Fan, Z., Yang, L., Li, Y., Lv, X. and Miao, Y. (2020) Metastable state of gas hydrate during decomposition: a novel phenomenon. Chinese Journal of Chemical Engineering, 28(4), pp. 949-954. (doi: 10.1016/j.cjche.2020.02.003)
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Abstract
Natural gas hydrates are solid compounds with cage-like structures formed by gas and water. An intriguing phenomenon that gas hydrates can dissociate at a low rate below the ice freezing point has been viewed as the metastability of hydrate. The mechanisms of hydrate metastability have been widely studied, and many mechanisms were proposed involving the self-preservation effect, supercooled water-gas-hydrate metastable equilibrium, and supersaturated liquid–gas-hydrate system etc. The metastable state of hydrate could be of crucial significance in the kinetics of hydrate formation and decomposition, heat and mass transfer during gas production processes, and the application of hydrate-based technique involving desalination, energy storage and transportation, and gas separation and sequestration. Few researches have systematically considered this phenomenon, and its mechanism remains unclear. In this work, various mechanisms and hypothesis explaining the metastable state of gas hydrates were introduced and discussed. Further studies are still required to reveal the intrinsic nature of this metastable state of gas hydrate, and this work could give some implications on the existing theory and current status of relevant efforts.
| Item Type: | Articles |
|---|---|
| Additional Information: | This study is supported by the National Key R&D Program of China (Grant Nos. 2018YFC0310006 and 2017YFC0307300), the National Natural Science Foundation of China (Grant Nos. 51806027 and 51890911) and PetroChina Innovation Foundation. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Fan, Zhen |
| Authors: | Sun, R., Fan, Z., Yang, L., Li, Y., Lv, X., and Miao, Y. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Chinese Journal of Chemical Engineering |
| Publisher: | Elsevier |
| ISSN: | 1004-9541 |
| ISSN (Online): | 2210-321X |
| Published Online: | 19 February 2020 |
| Copyright Holders: | Copyright © 2020 The Authors |
| First Published: | First published in Chinese Journal of Chemical Engineering 28(4): 949-954 |
| Publisher Policy: | Reproduced under a Creative Commons licence |
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