Migration of sulfur between organic and inorganic phases during hydrodesulfurization processes
- Southern Illinois Univ., Carbondale (USA)
In the course of investigation of the non-isothermal hydrodesulfurization of model organic sulfur compounds in a coal-like environment with and without troilite, it was found that some of the non-thiophenic sulfur from the organic compounds was absorbed by troilite. This observation suggested that during hydrodesulfurization the organic sulfur had migrated to the inorganic phase. As the temperature was raised, more H{sub 2}S evolved from the sample with troilite, suggesting reevolution by pyrrhotite to trolite conversion. 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 Moessbauer spectroscopy, 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:
- 5436587
- Report Number(s):
- CONF-8806313--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA), Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Vol. 33:1; ISSN 0569-3772; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for desulfurization of coal
Development of techniques using thermal desorption modulators for gas chromatography and their applications in hydrodesulfurization studies
Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ABSORPTION
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
EVEN-EVEN NUCLEI
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
IRON SULFIDES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
MATERIALS
MINERALS
MOESSBAUER EFFECT
NONMETALS
NUCLEI
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHASE TRANSFORMATIONS
POLYCYCLIC SULFUR HETEROCYCLES
PYRRHOTITE
SPECTROSCOPY
STABLE ISOTOPES
SULFIDE MINERALS
SULFIDES
SULFUR
SULFUR 34
SULFUR COMPOUNDS
SULFUR ISOTOPES
TEMPERATURE DEPENDENCE
TRACER TECHNIQUES
TRANSITION ELEMENT COMPOUNDS
TROILITE