High-temperature and high-pressure NMR investigations of low viscous fluids confined in mesoporous systems
Author:
Ok Salim1, Sheets Julie1, Welch Susan A.1, Cole David R.12, Berman Marc3, Rúa Armando3, Greenbaum Steve3, Srivastava Deepansh J.2, Grandinetti Philip J.2
Affiliation:
1. School of Earth Sciences, The Ohio State University , Columbus , Ohio 43210 USA 2. Department of Chemistry , The Ohio State University , Columbus , Ohio 43210 , USA 3. Department of Physics & Astronomy , Hunter College of the City University of New York , New York , NY 10065 , USA
Abstract
Abstract
In this contribution, the relaxation and diffusional behaviors of low viscous fluids, water and methanol confined into mesoporous silica and controlled size pore glass were investigated. The engineered porous systems are relevant to geologically important subsurface energy materials. The engineered porous proxies were characterized by Brunauer–Emmett–Teller (BET) surface analyzer, nuclear magnetic resonance (NMR) spectroscopy, and electron microscopy (EM) to determine surface area, pore-wall protonation and morphology of these materials, respectively. The confined behavior of the low viscous fluids was studied by varying pore diameter, fluid-to-solid ratio, temperature, and pressure, and then compared to bulk liquid state. Both relaxation and diffusion behaviors for the confined fluids showed increasing deviation from pure bulk fluids as the fluid-to-solid ratio was decreased, and surface-to-volume ratio (S/V) was varied. Variable pressure deuteron NMR relaxation of confined D2O and confined methanol, deuterated at the hydroxyl or methyl positions, were performed to exploit the sensitivity of the deuteron quadrupole moment to molecular rotation. The methanol results demonstrated greater pressure dependence than those for water only in bulk. The deviations from bulk liquid behavior arise from different reasons such as confinement and the interactions between confined fluid and the nano-pore wall. The results of the present report give insight into the behavior of low viscosity fluid in nano-confined geometries under different state conditions.
Funder
A.P. Sloan Foundation Department of Energy
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry
Reference65 articles.
1. Millischuk, A. A., Ladanyi, B. M. J. Chem. Phys. 2014, 141, 18C513. https://doi.org/10.1063/1.4896218. 2. Vogel, M. Eur. Phys. J. 2010, 189, 47, https://doi.org/10.1140/epjst/e2010-01309-9. 3. D’Agostino, C., Mitchell, J., Gladden, L. F., Mantle, M. D. J. Phys. Chem. C 2012, 116, 8975, https://doi.org/10.1021/jp2123295. 4. Demuth, D., Sattig, M., Steinrucken, E., Weigler, M., Vogel, M. Z. Phys. Chem. 2018, 232, 1059, https://doi.org/10.1515/zpch-2017-1027. 5. Gelb, L. D., Gubbins, K. E., Radhakrishnan, R., Sliwinska-Bartkowiak, M. Rep. Prog. Phys. 1999, 62, 1573, https://doi.org/10.1088/0034-4885/62/12/201.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|