The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy

doi:10.1007/s12274-017-1638-8

	The role of water in methane adsorption and diffusion within nanoporous silica investigated by hyperpolarized Xe-129 and H-1 PFG NMR spectroscopy
	Pan, Xiulian 1; Bao, Xinhe 1; Hu, Yuanli 1,3; Li, Mingrun 1; Hou, Guangjin 1; Xu, Shutao 2; Gong, Ke 1,3; Liu, Xianchun 1; Han, Xiuwen 1
刊名	NANO RESEARCH
	2018
卷号	11 期号:1 页码:360-369
关键词	Water Adsorption Nanopores Diffusion Hyperpolarized Xe-129 Nuclear Magnetic Resonance
ISSN号	1998-0124
DOI	10.1007/s12274-017-1638-8
文献子类	Article
英文摘要	Understanding 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.
WOS关键词	MESOPOROUS SILICA ; CONFINED WATER ; POROUS SILICA ; SURFACE-AREA ; PORE-SIZE ; DYNAMICS ; SBA-15 ; SHALE ; NEUTRON ; MCM-41
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	TSINGHUA UNIV PRESS
WOS记录号	WOS:000419002100030
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169242]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Pan, Xiulian; Bao, Xinhe
作者单位	1.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
推荐引用方式 GB/T 7714	Pan, Xiulian,Bao, Xinhe,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[J]. NANO RESEARCH,2018,11(1):360-369.
APA	Pan, Xiulian.,Bao, Xinhe.,Hu, Yuanli.,Li, Mingrun.,Hou, Guangjin.,...&Han, Xiuwen.(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	Pan, Xiulian,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.