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The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy
Hu, Yuanli1,3; Li, Mingrun1; Hou, Guangjin1; Xu, Shutao2; Gong, Ke1,3; Liu, Xianchun1; Han, Xiuwen1; Pan, Xiulian1; Bao, Xinhe1
KeywordWater Adsorption Nanopores Diffusion Hyperpolarized Xe-129 Nuclear Magnetic Resonance
Source PublicationNANO RESEARCH
2018
ISSN1998-0124
DOI10.1007/s12274-017-1638-8
Volume11Issue:1Pages:360-369
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordMESOPOROUS SILICA ; CONFINED WATER ; POROUS SILICA ; SURFACE-AREA ; PORE-SIZE ; DYNAMICS ; SBA-15 ; SHALE ; NEUTRON ; MCM-41
AbstractUnderstanding the properties and behavior of water molecules in restricted geometries, such as the nanopores of rocks, is of interest for shale gas exploitation. We present herein ex situ and in situ nuclear magnetic resonance (NMR) studies on the effects of water on the adsorption and diffusion of methane in nanopores. Silica materials with one-dimensional pores of ZSM-22, MCM-41, and SBA-15, with pore sizes ranging from 0.5 to 6 nm, were chosen as models. Hyperpolarized (HP) Xe-129 NMR results show that water adsorption does not affect the pore sizes of ZSM-22 and MCM-41 but reduces that of SBA-15. The presence of water suppresses methane adsorption; this suppression effect is stronger in smaller pores. The self-diffusion coefficients of methane within ZSM-22 and MCM-41 are not significantly influenced by the presence of water, as measured by H-1 pulsed field gradient (PFG) NMR. However, within SBA-15, which has a pore size of 6 nm, the diffusion coefficient of methane increases as the amount of water adsorption increases, peaks, and then decreases to a constant value with further water adsorption. These experiments reveal the effects of the pore size and the presence of water on methane adsorption and diffusion in constrained spaces, which could have important implications for flow simulations of methane in shales.
Language英语
WOS IDWOS:000419002100030
PublisherTSINGHUA UNIV PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169243
Collection中国科学院大连化学物理研究所
Corresponding AuthorPan, Xiulian; Bao, Xinhe
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olefins, Dalian Natl Lab Clean Energy, 457 Zhongshan Rd, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Hu, Yuanli,Li, Mingrun,Hou, Guangjin,et al. The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy[J]. NANO RESEARCH,2018,11(1):360-369.
APA Hu, Yuanli.,Li, Mingrun.,Hou, Guangjin.,Xu, Shutao.,Gong, Ke.,...&Bao, Xinhe.(2018).The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy.NANO RESEARCH,11(1),360-369.
MLA Hu, Yuanli,et al."The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy".NANO RESEARCH 11.1(2018):360-369.
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