Formation of clathrate cages of sI methane hydrate revealed by ab initio study
We studied the formation micro-mechanism of the small and large cages in the nucleation pathway of sI methane hydrate using ab initio calculations. We found that the cage precursor is a pentagonal ring of water molecules plus one methane molecule, which is formed through the attraction of the pentag...
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ftrepec:oai:RePEc:eee:energy:v:120:y:2017:i:c:p:698-704 2024-04-14T08:14:47+00:00 Formation of clathrate cages of sI methane hydrate revealed by ab initio study Liu, Jinxiang Hou, Jian Xu, Jiafang Liu, Haiying Chen, Gang Zhang, Jun http://www.sciencedirect.com/science/article/pii/S0360544216317753 unknown http://www.sciencedirect.com/science/article/pii/S0360544216317753 article ftrepec 2024-03-19T10:38:19Z We studied the formation micro-mechanism of the small and large cages in the nucleation pathway of sI methane hydrate using ab initio calculations. We found that the cage precursor is a pentagonal ring of water molecules plus one methane molecule, which is formed through the attraction of the pentagonal water ring to the methane molecule. Due to the difference of the hydrophobic-hydrophilic effects, the ring expansion mechanism and the layer-separated mechanism are observed for the growth of water faces in the small and large cages, respectively. Further, formation of the small cage is more structurally feasible and will locally prefer in the early stage of nucleation, but the large cages will dominate in the crystalline structure of methane hydrate, attributing to their high stabilization energy. Formation; Clathrate cage; Methane hydrate; ab initio calculation; Article in Journal/Newspaper Methane hydrate RePEc (Research Papers in Economics) |
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Open Polar |
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RePEc (Research Papers in Economics) |
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unknown |
description |
We studied the formation micro-mechanism of the small and large cages in the nucleation pathway of sI methane hydrate using ab initio calculations. We found that the cage precursor is a pentagonal ring of water molecules plus one methane molecule, which is formed through the attraction of the pentagonal water ring to the methane molecule. Due to the difference of the hydrophobic-hydrophilic effects, the ring expansion mechanism and the layer-separated mechanism are observed for the growth of water faces in the small and large cages, respectively. Further, formation of the small cage is more structurally feasible and will locally prefer in the early stage of nucleation, but the large cages will dominate in the crystalline structure of methane hydrate, attributing to their high stabilization energy. Formation; Clathrate cage; Methane hydrate; ab initio calculation; |
format |
Article in Journal/Newspaper |
author |
Liu, Jinxiang Hou, Jian Xu, Jiafang Liu, Haiying Chen, Gang Zhang, Jun |
spellingShingle |
Liu, Jinxiang Hou, Jian Xu, Jiafang Liu, Haiying Chen, Gang Zhang, Jun Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
author_facet |
Liu, Jinxiang Hou, Jian Xu, Jiafang Liu, Haiying Chen, Gang Zhang, Jun |
author_sort |
Liu, Jinxiang |
title |
Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
title_short |
Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
title_full |
Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
title_fullStr |
Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
title_full_unstemmed |
Formation of clathrate cages of sI methane hydrate revealed by ab initio study |
title_sort |
formation of clathrate cages of si methane hydrate revealed by ab initio study |
url |
http://www.sciencedirect.com/science/article/pii/S0360544216317753 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0360544216317753 |
_version_ |
1796313010044665856 |