University of Oulu

Javed, M., Komulainen, S., Daigle, H., Zhang, B., Vaara, J., Zhou, B., Telkki, V. (2019) Determination of pore structures and dynamics of fluids in hydrated cements and natural shales by various 1H and 129Xe NMR methods. Microporous and Mesoporous Materials, 281, 66-74. doi:10.1016/j.micromeso.2019.02.034

Determination of pore structures and dynamics of fluids in hydrated cements and natural shales by various 1H and 129Xe NMR methods

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Author: Javed, Muhammad Asadullah1; Komulainen, Sanna1; Daigle, Hugh2;
Organizations: 1NMR Research Unit, University of Oulu, P.O.Box 3000, FIN-90014, Finland
2Hildebrand Department of Petroleum and Geosystems Engineering, University of Texas at Austin, TX, USA
3School of Materials Science and Engineering, Tongji University, Shanghai, 210000, China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.7 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2019-04-17


Cements and shales play a vital role in the construction and energy sectors. Here, we use a set of advanced NMR methods to characterize the porous networks and dynamics of fluids in hydrated cement and shale samples. We compare the properties of cements from two different manufacturers, BASF and Portland, as well as shales brought from USA and China. 129Xe NMR spectra of xenon gas adsorbed in the samples indicate that the capillary mesopores are smaller and the exchange between free and confined gas is slower in the Portland than in the BASF cement samples. The pores probed by xenon in the shale samples from USA are significantly smaller than in the cement samples, partially in the micropore region. There is a substantial difference in between the 129Xe spectra of shales from USA and China. Whereas the latter show a clear signature of paramagnetic impurities by exhibiting large negative 129Xe chemical shifts (referenced to the free gas), the samples from USA lack the negative chemical shifts but feature large positive shift values, which may indicate the presence of micropores and/or paramagnetic defects. 1H NMR cryoporometry measurements using acetonitrile as probe liquid allowed the observation of mesopores in the shale samples as well, and T2-T2 relaxation exchange experiment enabled the quantification of the exchange rates between free and confined acetonitrile.

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Series: Microporous and mesoporous materials
ISSN: 1387-1811
ISSN-E: 1873-3093
ISSN-L: 1387-1811
Volume: 281
Pages: 66 - 74
DOI: 10.1016/j.micromeso.2019.02.034
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
116 Chemical sciences
Funding: B.Z. acknowledges financial support from an NSFC Grant No. 41572103. V.-V.T. acknowledges the financial support of the European Research Council under Horizon 2020 (H2020/2018–2022/ERC grant agreement no. 772110) and Academy of Finland (grants #289649, 294027 and 319216). JV is also grateful to the Academy of Finland (grant #296292) for financial support. The authors acknowledge financial support from the Kvantum institute (University of Oulu).
EU Grant Number: (772110) UFLNMR - Ultrafast Laplace NMR
Academy of Finland Grant Number: 289649
Detailed Information: 289649 (Academy of Finland Funding decision)
294027 (Academy of Finland Funding decision)
319216 (Academy of Finland Funding decision)
296292 (Academy of Finland Funding decision)
Copyright information: © 2019 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (