Electron spin resonance of isolated coal macerals: a preliminary survey

Conference · Sat Jan 01 04:00:00 EST 1983 · Prepr. Pap. - Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5859007

Silbernagel, B G ^[1]; Gebhard, L A; Dyrkacz, G R

---

1. Exxon Research and Engineering Co., Linden, NJ

Thirty-seven samples from 16 coals of the Pennsylvania State University coal data base were examined by electron spin resonance (ESR) technique. Data were recorded from very small (approx. 10 mg) samples of fractions separated by isopycnic density gradient centrifugation of small coal particles in an aqueous CsCl density gradient. The ESR survey of carbon radicals in the separated macerals shows that each maceral type exhibits characteristic carbon radical properties. The radical intensities varied widely and were not related to physical density. The intensities were found to be reasonably similar within a given coal but varied significantly from one coal to the next. (BLM)

• OSTI ID: 5859007
• Report Number(s): CONF-830303-
• Conference Information: Journal Name: Prepr. Pap. - Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 28:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALI METAL COMPOUNDS
CESIUM CHLORIDES
CESIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DATA
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MACERALS
MAGNETIC RESONANCE
NUMERICAL DATA
RESONANCE
SEPARATION PROCESSES