Nuclear magnetic resonance (NMR) diffusometry is a powerful tool for measuring dynamics of multi-component mixtures. In guest-host systems comprised of mixed fluids and solids, the short transverse relaxation times and decreased resolution complicate the interpretation of the experimental results resulting in a lack of published data on guests in nanoporous solid hosts. Here, the pulsed field gradient (PFG) technique is utilized to reveal chemically-specific diffusion coefficients in mixed fluids intercalated within solid hosts. Mesoporous glasses and zeolites with 2D or 3D channels were utilized and diffusion coefficients at different loadings are evaluated. Furthermore, the effect of pressure on the transverse relaxation times and the NMR spectra were investigated. These diffusion coefficients are analyzed to evaluate guest/host interfacial transport. The outcomes of this work willcould help with the rational design of stimulation fluids.

Multicomponent diffusion in mesoporous materials evaluated via diffusion NMR: Guest/host interfacial transport

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.