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In Situ Raman Analysis on the Dissociation Behavior of Mixed CH4-CO2 Hydrates
Zhou, Xuebing1,2,3; Long, Zhen1,2; Liang, Shuai1; He, Yong1,2; Yi, Lizhi1,2; Li, Dongliang1,2; Liang, Deqing1,2
2016-02-01
发表期刊ENERGY & FUELS
卷号30期号:2页码:1279-1286
摘要Previous studies have indicated that CH4-CO2 hydrate replacement is closely related to the crystal dissociation and reformation processes. To further elucidate the replacement mechanism, the melting processes of mixed CH4-CO2 hydrates were characterized using in situ Raman spectroscopy and compared to that of pure CH4 and CO2 hydrates. Analysis results from powder X-ray diffraction showed that the crystalline structure of the mixed CH4-CO2 hydrates is strucutre I. The current study suggested that the hydrate crystal units collapse as an entity with no clear dependence upon gas distributions within the hydrate phase. The dissociation time was found to be stoichastic, consistent with the polycrystalline nature of the hydrate particles. Interestingly, for hydrates containing CH4, the Raman peaks of both CH4 and CO2 in the hydrate phase showed a temporary rise during the hydrate dissociation processes, suggesting the reformation of hydrates below the hydrate dissociation surface. A dissociation inside the hydrate crystal together with the self-preservation effect was assumed to be responsible for such a phenomenon.
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1021/acs.energyfuels.5b02119
研究领域[WOS]Energy & Fuels ; Engineering
关键词[WOS]METHANE HYDRATE ; CLATHRATE HYDRATE ; SELF-PRESERVATION ; CH4 HYDRATE ; GAS HYDRATE ; SPECTROSCOPIC OBSERVATIONS ; PRESSURIZED CO2 ; LIQUID CO2 ; REPLACEMENT ; ICE
收录类别SCI
语种英语
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000370679000056
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/11124
专题中国科学院广州能源研究所
作者单位1.Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhou, Xuebing,Long, Zhen,Liang, Shuai,et al. In Situ Raman Analysis on the Dissociation Behavior of Mixed CH4-CO2 Hydrates[J]. ENERGY & FUELS,2016,30(2):1279-1286.
APA Zhou, Xuebing.,Long, Zhen.,Liang, Shuai.,He, Yong.,Yi, Lizhi.,...&Liang, Deqing.(2016).In Situ Raman Analysis on the Dissociation Behavior of Mixed CH4-CO2 Hydrates.ENERGY & FUELS,30(2),1279-1286.
MLA Zhou, Xuebing,et al."In Situ Raman Analysis on the Dissociation Behavior of Mixed CH4-CO2 Hydrates".ENERGY & FUELS 30.2(2016):1279-1286.
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