Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K
文献类型：期刊论文
| 作者 | Wan, Lihua ; Zhou, Xuebing; Chen, Peili; Zang, Xiaoya; Liang, Deqing; Guan, Jinan
|
| 刊名 | CRYSTALS
 |
| 出版日期 | 2019-04-01 |
| 卷号 | 9期号:4页码:17 |
| 关键词 | gas hydrate decomposition reformation pre-decomposition pressure nanoscale pores |
| ISSN号 | 2073-4352 |
| DOI | 10.3390/cryst9040200 |
| 通讯作者 | Wan, Lihua(wanlh@ms.giec.ac.cn) |
| 英文摘要 | The formation and decomposition of gas hydrates in nanoscale sediments can simulate the accumulation and mining process of hydrates. This paper investigates the Raman spectra of water confined inside the nanoscale pores of silica gel, the decomposition characterizations of methane hydrate that formed from the pore water, and the intrinsic relationship between them. The results show that pore water has stronger hydrogen bonds between the pore water molecules at both 293 K and 223 K. The structure of pore water is conducive to the nucleation of gas hydrate. Below 273.15 K, the decomposition of methane hydrate formed from pore water was investigated at atmospheric pressure and at a constant volume vessel. We show that the decomposition of methane hydrate is accompanied by a reformation of the hydrate phase: The lower the decomposition temperature, the more times the reformation behavior occurs. The higher pre-decomposition pressure that the silica gel is under before decomposition is more favorable to reformation. Thus, reformation is the main factor in methane hydrate decomposition in nanoscale pores below 273.15 K and is attributed to the structure of pore water. Our results provide experimental data for exploring the control mechanism of hydrate accumulation and mining. |
| WOS关键词 | GAS HYDRATE ; PHASE-EQUILIBRIA ; STABILITY ZONE ; CARBON-DIOXIDE ; POROUS-MEDIA ; X-RAY ; THERMODYNAMIC PROPERTIES ; SELF-PRESERVATION ; DISSOCIATION ; WATER |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51576197] ; National Natural Science Foundation of China (NSFC)[51106163] ; National Natural Science Foundation of China (NSFC)[51706230] ; National Natural Science Foundation of China (NSFC)[51676197] ; National Key Research and Development Plan of China[2016YFC0304002] ; NSFC from the Government of Guangdong Province[U0933004] |
| WOS研究方向 | Crystallography ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000467300100020 |
| 出版者 | MDPI |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Key Research and Development Plan of China ; NSFC from the Government of Guangdong Province |
| 源URL | [http://ir.giec.ac.cn/handle/344007/24948]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Wan, Lihua |
| 作者单位 | Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wan, Lihua,Zhou, Xuebing,Chen, Peili,et al. Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K[J]. CRYSTALS,2019,9(4):17. |
| APA | Wan, Lihua,Zhou, Xuebing,Chen, Peili,Zang, Xiaoya,Liang, Deqing,&Guan, Jinan.(2019).Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K.CRYSTALS,9(4),17. |
| MLA | Wan, Lihua,et al."Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K".CRYSTALS 9.4(2019):17. |
入库方式： OAI收割
来源：广州能源研究所
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