Migration of sulfur between organic and inorganic phases during hydrodesulfurization processes

Conference · Wed Jun 01 00:00:00 EDT 1988 · Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)

OSTI ID:6507782

Dunkerton, L V; Phillips, J B; Mitra, S; Mehrotra, S; Nigam, A ^[1]; Hackley, K C ^[2]

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1. Dept. of Chemistry and Biochemistry, Southern Illinois Univ. at Carbondale, Carbondale, IL (US)
2. Illinois State Geology Survey, 615 E. Peabody Drive, Champaign, IL (US)

The co-occurrence of organic sulfur and iron sulfides in high-sulfur coal and their interrelationships are suggested to play an important role in the design and effectiveness of methods for precombustion desulfurization. The mobility and interconversion of pyritic and organic sulfur forms can be both advantageous as well as disadvantageous. Iron catalysts have been reported to exhibit high activity in coal gasification. More extensive studies have been done regarding the role of iron sulfides in hydroliquefaction in which pyrite is transformed to pyrrhotite and H/sub 2/S which will catalyze hydroliquefaction around 380/sup 0/C. The purpose of this study was to use isotopic labeling to determine the mechanism of incorporation of sulfur into troilite. One possibility, as suggested by the formation of pyrrhotite confirmed by Mossbauer spectroscopy, is that the H/sub 2/S produced from the organic compound was transferred to the inorganic phase, and then as the temperature was raised, H/sub 2/S evolution occurred from the troilite. Another possibility was that a direct reaction between the troilite and the organic compound took place, forming an intermediate followed by H/sub 2/S evolution from this intermediate as the temperature was raised. The fate and H/sub 2/S evolution profile from the labeling of the mobile organic sulfur group has been studied in an effort to distinguish possible mechanisms and demonstrate the role of troilite in this process.

• OSTI ID: 6507782
• Report Number(s): CONF-8806136-
• Journal Information: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States), Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Vol. 33:1; ISSN ACGPA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010404 -- Coal
Lignite
& Peat-- Gasification
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COAL LIQUEFACTION
DESULFURIZATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
IRON COMPOUNDS
IRON SULFIDES
ISOTOPE RATIO
LABELLING
LIQUEFACTION
MATERIALS
MINERALS
MOESSBAUER EFFECT
PYRRHOTITE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TROILITE