Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
Molecular dynamics simulations for the growth of CH_4-CO_2 mixed hydrate | |
Yi Lizhi; Liang Deqing; Zhou Xuebing; Li Dongliang | |
2014 | |
发表期刊 | Journal of Energy Chemistry |
ISSN | 2095-4956 |
卷号 | 23期号:6页码:747 |
摘要 | Molecular dynamics simulations are performed to study the growth mechanism of CH 4 -CO 2 mixed hydrate in x CO 2 = 75%, x CO 2 = 50%, and x CO 2 = 25% systems at T = 250 K, 255 K and 260 K, respectively. Our simulation results show that the growth rate of CH 4 -CO 2 mixed hydrate increases as the CO 2 concentration in the initial solution phase increases and the temperature decreases. Via hydrate formation, the composition of CO 2 in hydrate phase is higher than that in initial solution phase and the encaging capacity of CO 2 in hydrates increases with the decrease in temperature. By analysis of the cage occupancy ratio of CH 4 molecules and CO 2 molecules in large cages to small cages, we find that CO 2 molecules are preferably encaged into the large cages of the hydrate crystal as compared with CH 4 molecules. Interestingly, CH 4 molecules and CO 2 molecules frequently replace with each other in some particular cage sites adjacent to hydrate 2 molecules occupying large cages and CH 4 molecules occupying small cages in hydrate. |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.giec.ac.cn/handle/344007/22118 |
专题 | 中国科学院广州能源研究所 |
作者单位 | 中国科学院广州能源研究所 |
第一作者单位 | 中国科学院广州能源研究所 |
推荐引用方式 GB/T 7714 | Yi Lizhi,Liang Deqing,Zhou Xuebing,et al. Molecular dynamics simulations for the growth of CH_4-CO_2 mixed hydrate[J]. Journal of Energy Chemistry,2014,23(6):747. |
APA | Yi Lizhi,Liang Deqing,Zhou Xuebing,&Li Dongliang.(2014).Molecular dynamics simulations for the growth of CH_4-CO_2 mixed hydrate.Journal of Energy Chemistry,23(6),747. |
MLA | Yi Lizhi,et al."Molecular dynamics simulations for the growth of CH_4-CO_2 mixed hydrate".Journal of Energy Chemistry 23.6(2014):747. |
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