Surface enhanced nuclear magnetic resonance relaxation mechanisms and their significance in chemical engineering applications

BE Kinn, TR Myers, AM Allgeier - Current Opinion in Chemical Engineering, 2019 - Elsevier
Highlights•NMR relaxometry mechanisms relevant to porous material characterization
include paramagnetic coupling, dipolar coupling and diffusion processes.•Determination of …

Estimating the water holding capacity of the critical zone using near‐surface geophysics

BA Flinchum, WS Holbrook, D Grana… - Hydrological …, 2018 - Wiley Online Library
In high‐mountain watersheds, the critical zone holds crucial life‐sustaining water stores in
the form of shallow groundwater aquifers. To better understand the role that the critical zone …

NMR profiling of reaction and transport in thin layers: A review

R Nicasy, H Huinink, B Erich, A Olaf - Polymers, 2022 - mdpi.com
Reaction and transport processes in thin layers of between 10 and 1000 µm are important
factors in determining their performance, stability and degradation. In this review, we discuss …

[HTML][HTML] Liquid uptake in porous cellulose sheets studied with UFI-NMR: Penetration, swelling and air displacement

RJK Nicasy, C Waldner, SJF Erich, OCG Adan… - Carbohydrate …, 2024 - Elsevier
Liquid penetration in porous cellulosic materials is crucial in many technological fields. The
complex geometry, small pore size, and often fast timescale of liquid uptake makes the …

Impact of paramagnetic minerals on NMR-converted pore size distributions in Permian Carynginia shales

Y Yuan, R Rezaee - Energy & Fuels, 2019 - ACS Publications
Pore size distribution (PSD) is a fundamental petrophysical parameter for shale formation
evaluation. Nuclear magnetic resonance (NMR), performing as a widely acknowledged …

Magnetic resonance sounding measurements as posterior information to condition hydrological model parameters: Application to a hard-rock headwater catchment

N Lesparre, JF Girard, B Jeannot, S Weill, M Dumont… - Journal of …, 2020 - Elsevier
In headwater catchment, the calibration of hydrological models is complex due to the
scarcity of data in mountainous areas. Here, an innovative methodology is developed to …

Surface relaxivity estimation of coals using the cutting grain packing method for coalbed methane reservoirs

J Xu, H Xu, C Zhai, Y Cong, S Sang, PG Ranjith, Q Li… - Powder Technology, 2023 - Elsevier
Low-field nuclear magnetic resonance (NMR) has been widely used to express the pore-
size distributions of conventional and unconventional reservoirs. Based on the equation 1 T …

Pore-size measurement from eigenvalues of magnetic resonance relaxation

A Afrough, F Marica, B MacMillan, BJ Balcom - Physical Review Applied, 2021 - APS
Nonground eigenvalues are widely disregarded in magnetic resonance relaxation
measurements of porous media due to difficulties involved in their measurement, detection …

Characterizing the critical zone using borehole and surface nuclear magnetic resonance

BA Flinchum, WS Holbrook, AD Parsekian… - Vadose Zone …, 2019 - Wiley Online Library
Core Ideas Unsaturated saprolite, saturated saprolite, and fractured rock have unique NMR
responses. Surface NMR signals will be dominated by water in saturated saprolite. The …

The NMR relaxation response of unconsolidated sediments during drainage and imbibition

S Falzone, K Keating - Vadose Zone Journal, 2016 - pubs.geoscienceworld.org
In this laboratory study, nuclear magnetic resonance (NMR) relaxation data were collected
on unconsolidated sediment to determine the NMR response, characterized by the mean …