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Raman analysis on methane production from natural gas hydrate by carbon dioxide-methane replacement
Xu, Chun-Gang1,2; Cai, Jing1,2; Lin, Fu-hua1,2; Chen, Zhao-Yang1,2; Li, Xiao-Sen1,2
2015
Source PublicationENERGY
Volume79Pages:111-116
AbstractUsing CO2-CH4 (carbon dioxide methane) replacement to produce CH4 from NGH (natural gas hydrate) is not only a new CH4 production technology but also a direct way to disposal CO2 by CO2 hydrates. Although there are many studies focusing on the mechanism of CH4 replacement in hydrates by CO2, the mechanism of the replacement is still not clear. In this work, the replacement process and hydrate structure change are tracked and investigated by Raman and NMR (nuclear magnetic resonance) spectra. By comprehensively analyzing the Raman and NMR spectra, we infer the mechanism of the replacement and the hydrate structures. Conclusions are drawn as, on one hand, CH4 molecules are fully replaced with the gas solid interface, but partly replaced in deeply inner hydrates by CO2 molecules; on the other hand, the CO2 hydrate and CH4 hydrate coexist in a type of structure I (sl) and there is no structure transformation during the replacement. The research results are important to further confirm the mechanism of the replacement and reveal factors restraining efficiency of the CH4 production. (C) 2014 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordRaman Co2 Replacement Ngh (Natural Gas Hydrate) Ch4 Production
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.energy.2014.10.068
WOS Subject ExtendedThermodynamics ; Energy & Fuels
WOS KeywordPRODUCTION BEHAVIOR ; LIQUID CO2 ; MIXED-GAS ; UNCONSOLIDATED SEDIMENT ; SPECTROSCOPIC ANALYSIS ; MOLECULAR SIMULATION ; POROUS SEDIMENT ; DEPRESSURIZATION ; ENERGY ; ENCLATHRATION
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Energy & Fuels
WOS IDWOS:000348959000010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10796
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Beijing 100864, Peoples R China
2.Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Xu, Chun-Gang,Cai, Jing,Lin, Fu-hua,et al. Raman analysis on methane production from natural gas hydrate by carbon dioxide-methane replacement[J]. ENERGY,2015,79:111-116.
APA Xu, Chun-Gang,Cai, Jing,Lin, Fu-hua,Chen, Zhao-Yang,&Li, Xiao-Sen.(2015).Raman analysis on methane production from natural gas hydrate by carbon dioxide-methane replacement.ENERGY,79,111-116.
MLA Xu, Chun-Gang,et al."Raman analysis on methane production from natural gas hydrate by carbon dioxide-methane replacement".ENERGY 79(2015):111-116.
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