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Swapping methane with carbon dioxide in spherical hydrate pellets
Zhou, Xuebing1,2,3; Li, Dongliang1,2,3; Zhang, Shaohong1; Liang, Deqing1,2,3
2017-12-01
Source PublicationENERGY
Volume140Pages:136-143
AbstractRecovering CH4 with CO2 in hydrocarbon hydrates is renowned as an eco-friendly method for potential energy production and climate change mitigation. Due to the foamy nature of hydrates, determining the effect of hydrate surface area on the CH4 recovering rate has always been a challenge. CH4 hydrates in this work were shaped into spherical pellets 16 mm in diameter, and the CH4-CO2 replacements were carried out at about 274 K, 3.0 MPa by adding different amount of pellets in the reactor. To reveal the kinetic properties, cryo-SEM and a model based on gas diffusion theory was also employed. Results indicated that the CH4 recovery rate in the replacement was proportional to the surface area of hydrate pellets. In each 1400-h replacement, the CH4 production level was found to be about 4.5%, suggesting the gas swapping process tool< place in each pellet was the same. The kinetic model provided well descriptions of the replacements with the average deviation no more than 10%. The SEM images and the gas diffusion constants obtained from the kinetic model suggested that water mobility determined the gas diffusion rate in hydrates and help to smooth the hydrate surface during replacements. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordGas Hydrate Methane Carbon Dioxide Sem
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.energy.2017.08.082
WOS Subject ExtendedThermodynamics ; Energy & Fuels
WOS KeywordNATURAL-GAS HYDRATE ; LIQUID CO2 ; IN-SITU ; REPLACEMENT ; KINETICS ; CH4 ; RECOVERY ; MIXTURE ; PRODUCTIVITY ; SPECTROSCOPY
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51376182) ; CAS Program(KGZD-EW-301) ; Scientific cooperative project by CNPC ; CAS(2015A-4813)
WOS SubjectThermodynamics ; Energy & Fuels
WOS IDWOS:000415394200016
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/15862
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, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhou, Xuebing,Li, Dongliang,Zhang, Shaohong,et al. Swapping methane with carbon dioxide in spherical hydrate pellets[J]. ENERGY,2017,140:136-143.
APA Zhou, Xuebing,Li, Dongliang,Zhang, Shaohong,&Liang, Deqing.(2017).Swapping methane with carbon dioxide in spherical hydrate pellets.ENERGY,140,136-143.
MLA Zhou, Xuebing,et al."Swapping methane with carbon dioxide in spherical hydrate pellets".ENERGY 140(2017):136-143.
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