- Conference date: 2-4 June 1980
- Location: Morgantown, WV, USA
Heat capacity and NMR studies examine the freezing phenomenon and molecular dynamics for water in Illinois bituminous and Wyoming subbituminous coals as well as an Arkansas lignite. For high water content a broad maximum in heat capacity is observed below 273 K. For low water content a continous transition from liquid‐like to solid‐like properties is observed. This latter deviation from the properties of bulk water is attributed to water‐coal surface interactions. Wideline and transient NMR observations on coals containing H2O and D2O suggest a continous change in characteristic times of motion with temperature on a microscopic scale. Observed activation energies for diffusion, Δ∠0.17 eV, are comparable to those for bulk water.
- Water heating
- Heat capacity
- Nuclear magnetic resonance
- Liquid solid interfaces
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