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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
Source PublicationENERGY & FUELS
Volume30Issue:2Pages:1279-1286
AbstractPrevious 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.
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/acs.energyfuels.5b02119
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordMETHANE HYDRATE ; CLATHRATE HYDRATE ; SELF-PRESERVATION ; CH4 HYDRATE ; GAS HYDRATE ; SPECTROSCOPIC OBSERVATIONS ; PRESSURIZED CO2 ; LIQUID CO2 ; REPLACEMENT ; ICE
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000370679000056
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Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11124
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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