Diffusion of gases in New Mexico coals. Technical report (Final), 15 January 1986-30 September 1986
As part of the first phase of the study, characterization of the pore volume and surface area of coal was principally undertaken while the more-extensive and complex diffusivity and high-pressure adsorption experiments were being built. The careful characterization work resulted in new understanding of the limitations of mercury porosimetry and nitrogen adsorption analysis for coal. Results indicate that as the size of coal particles in a sample decreases, a spurious, intruded-pore volume is indicated in mercury porosimetry. Furthermore, at higher pressures of Hg, the penetration of Hg may actually be a measure of micropore crushing rather than pore structure information. Nitrogen adsorption measurements do not reflect the total surface area of the coal which is easily accessed and measured by carbon dioxide. At the same time the authors found that condensation of nitrogen and NMR relaxation experiments may lead to significantly new interpretations of coal porosity.
- Research Organization:
- New Mexico Univ., Albuquerque (USA). Dept. of Chemical and Nuclear Engineering
- OSTI ID:
- 6572640
- Report Number(s):
- PB-87-160883/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Diffusion of gases in coals and chars. Technical progress report No. 3, March 15-June 14, 1986
Diffusion of gases in coals and chars. Quarterly technical progress report No. 4, June 15-September 14, 1986
Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ADSORPTION
CARBONACEOUS MATERIALS
COAL
DIFFUSION
ELEMENTS
ENERGY SOURCES
FEDERAL REGION VI
FLUIDS
FOSSIL FUELS
FUELS
GASES
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
MERCURY
METALS
NEW MEXICO
NORTH AMERICA
NUCLEAR MAGNETIC RESONANCE
PARTICLE SIZE
POROSIMETERS
POROSITY
RESONANCE
SIZE
SORPTION
USA