EPR study of pore accessibility in Argonne premium coal samples

Conference · Fri Jan 01 04:00:00 EST 1988 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5975082

Cooray, L S; Kispert, L D; Wuu, S K

This study reports a spin probe - EPR study of pore size distribution, the basic/acidic reactive site distribution, hydrogen bonding site distribution and the effect of a swelling solvent on Blind Canyon, Pittsburgh 8 and Illinois 6 from the Argonne premium coal sample program and Illinois 6 (PSOC-1354) and New Mexico (PSOC-311) from the Penn State Coal Sample Bank at Penn State University. The spin probe - EPR method showed that as the swelling solvent was changed from benzene to pyridine, the number of spherical pores in Pittsburgh 8 decreased while the number of elongated pores of distinct size increased sharply in agreement with previously reported SANS studies. Reasonable agreement was found with independent studies on the average size distribution and the presence of acid character in the accessible pores of Illinois 6. Comparison between NMR data and the pore distribution pattern deduced by the spin-probe EPR method indicates that toluene swelled PSOC-1354 has more bottleneck pores with a radius of less than 5 nm which are not accessible to toluene than PSOC-311.

• Research Organization: Univ. of Alabama, Tuscaloosa (USA)
• DOE Contract Number: FG22-86PC90502
• OSTI ID: 5975082
• Report Number(s): CONF-8809161-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 33:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKYLATED AROMATICS
AROMATICS
AZINES
BARYONS
BENZENE
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL BONDS
COAL
DISTRIBUTION
ELECTRON SPIN RESONANCE
ELEMENTARY PARTICLES
ELEMENTS
ENERGY SOURCES
FERMIONS
FOSSIL FUELS
FUELS
HADRONS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN
MAGNETIC RESONANCE
MATERIALS
NEUTRONS
NONMETALS
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
POROSITY
PYRIDINE
PYRIDINES
RESONANCE
SCATTERING
SHAPE
SURFACE PROPERTIES
SWELLING
TOLUENE