Stability of coal microstructure on exposure to high pressures of helium.
- ORNL
Small angle neutron scattering (SANS) and ultra-small angle neutron scattering (USANS) measurements of the structure of two Australian bituminous coals (particle size -1mm+0.5mm) before, during and after exposure to 155 bar of helium were made in order to identify any effects of pressure alone on the pore size distribution of coal, and any irreversible effects on exposure to high pressures of helium in the pore size range from 3 nm to 10 m. No irreversible effects on exposure were identified for any pore size. No effects of pressure on pore size distribution were observed, except for a small effect at a pore size of about 2 m for one coal. This study provides a convenient baseline for SANS and USANS investigations on sorption of gases at elevated pressures on coals, by distinguishing between the effect of pressure alone on coal pore size distribution as against the effect of the gas to be investigated.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 979228
- Journal Information:
- Energy & Fuels, Vol. 23, Issue 10
- Country of Publication:
- United States
- Language:
- English
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