Role of iron vacancies in pyrrhotite-catalyzed liquefaction using H/sub 2/S and CO
As a part of continuing investigations into the chemistry of liquefaction catalyzed by metal sulfides, a study was made of the interaction of H/sub 2/S and CO with the pyrrhotite surface using ESR spectroscopy. Mineral contained in coals are reported to promote hydrogenation and hydrodesulfurization in low-rank coal conversion processes. More specifically, those containing iron are found to promote both hydrogenation and desulfurization reactions. In the pyrite and pyrrhotite forms, iron has hydrogenation activity. The liquefaction activities of iron sulfides in the absence of added H/sub 2/S are distinguished by sulfur concentration and shown to be FeS/sub 2/ > Fe/sub 2/S/sub 3/ > Fe/sub 1-x/S > FeS.
- Research Organization:
- Dept. of Chemistry, Univ. of North Dakota, Grand Forks, ND 58202
- OSTI ID:
- 6397207
- Report Number(s):
- CONF-870410-
- Journal Information:
- Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States), Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Vol. 32:1; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL RANK
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DESULFURIZATION
ELECTRON SPIN RESONANCE
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
IRON COMPOUNDS
IRON SULFIDES
KINETICS
LIQUEFACTION
MAGNETIC RESONANCE
MINERALS
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
PYRITE
PYRRHOTITE
REACTION KINETICS
RESONANCE
SPECTROSCOPY
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VACANCIES