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Atomic Mechanisms and Equation of State of Methane Adsorption in Carbon Nanopores
Zhu XY(朱雪燕); Zhao YP(赵亚溥); Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2014-08-07
Volume118Issue:31Pages:17737-17744
ISSN1932-7447
Abstract

Adsorption is an important issue both in the estimation of natural gas reserves and efficient storage of methane. In this study, we focus on the mechanisms of methane adsorption in carbon nanopores and endeavor to establish the equation of state for the adsorbed phase through molecular dynamics simulations and theoretical analyses. Here, the nanopores were modeled by carbon nanotubes (CNTs). The higher storage capacity of the CNT compared to the bulk phase was attributed to the additional pressure exerted by the CNT wall on the adsorbed phase, considering which, the equation of state for the adsorbed phase was established. As the CNT diameter increases, the adsorption structure transforms from a single-file chain to two adsorption layers. Moreover, it was found that there exists an optimal CNT diameter that maximizes the adsorption, which is due to the competition between the curvature effect and the size effect. In the explanation of this phenomenon, the nanostructure of the CNT wall plays an important role, without considering which, the adsorption density would monotonically decrease as the CNT diameter rises. Our findings and related analyses may help reveal the underlying mechanisms behind the adsorption phenomena, which is not only of theoretical importance, but may also help estimate the natural gas reserves and design nanoporous materials with higher storage capacity.

Subject AreaChemistry ; Science & Technology - Other Topics ; Materials Science
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000340222300064
Funding OrganizationThis work was jointly supported by the National Natural Science Foundation of China (NSFC, grant no. 11372313), the Key Research Program of the Chinese Academy of Sciences (grant no. KJZD-EW-M01), and the Instrument Developing Project of the Chinese Academy of Sciences (grant no. Y2010031).
DepartmentLNM纳/微系统力学与物理力学
Classification一类
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Cited Times:51[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49063
Collection非线性力学国家重点实验室
Corresponding AuthorZhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhu XY,Zhao YP,Zhao, YP . Atomic Mechanisms and Equation of State of Methane Adsorption in Carbon Nanopores[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2014,118(31):17737-17744.
APA Zhu XY,Zhao YP,&Zhao, YP .(2014).Atomic Mechanisms and Equation of State of Methane Adsorption in Carbon Nanopores.JOURNAL OF PHYSICAL CHEMISTRY C,118(31),17737-17744.
MLA Zhu XY,et al."Atomic Mechanisms and Equation of State of Methane Adsorption in Carbon Nanopores".JOURNAL OF PHYSICAL CHEMISTRY C 118.31(2014):17737-17744.
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