Catalyst accessibility in high volatile bituminous coal: Quarterly report

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7180291

Kispert, L D

The general objective of this research is to determine catalyst accessibility and the possible formation of hydrogen bonds in swellable pores of bituminous coal samples after the samples have been subjected to swelling by appropriate solvents, temperature variation and extraction with various acids or bases. To achieve this goal, use is being made of an EPR technique that has been developed recently in this lab involving nitroxide spin probes of different size, shapes and containing substituents with sites for hydrogen bonding. It has been shown possible to incorporate these nitroxide spin probes in the swellable pores of high volatile bituminous (hvb) Alabama coal from the Mary Lee, Black Creek, and American seams, as well as in samples of hvb coal from the Illinois No. 5 seam. Once the spin probes have become trapped in the swellable pores by pumping off the swelling solvent, it is possible to examine the accessible areas of a given size for a particular coal sample. It is also possible to detect in these accessible areas, the presence of hydrogen bonding as a function of swelling solvent, size of the diffusing spin probes, and temperature. It appears possible to estimate the size and number distribution of coal pores with or without hydrogen bonding sites, acidic or basic sites or reactive free radical sites.

• Research Organization: Alabama Univ., University (USA). Dept. of Chemistry
• DOE Contract Number: FG22-86PC90502
• OSTI ID: 7180291
• Report Number(s): DOE/PC/90502-1; ON: DE87004012
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CHEMICAL BONDS
CHEMICAL REACTIONS
COAL
ELECTRON SPIN RESONANCE
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROGENATION
IMPREGNATION
MAGNETIC RESONANCE
MATERIALS
ORGANIC SOLVENTS
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
SWELLING