Radiotracer (/sup 14/C) and catalytic study of thiophene hydrodesulfurization on the clean and carbided Mo(100) single-crystal surface
Journal Article
·
· J. Catal.; (United States)
OSTI ID:5327475
The role of adsorbed carbon overlayers and possible product poisoning (H/sub 2/S and cis-2-butene) in the thiophene hydrodesulfurization (HDS) reaction over Mo(100) single-crystal surfaces was investigated. Using the ..beta../sup -/ emitting /sup 14/C isotope, it was shown that adsorbed carbon remains on the Mo(100) surface after many thiophene turnovers (TN approx. = 10/sup 3/). HDS activities measured for carbided surfaces were found to be identical to that of initially clean Mo(100) single crystals, suggesting that the active catalyst surface is carbon covered. Deactivation of the single-crystal catalysts was caused by adsorption of H/sub 2/S onto the active HDS sites. Removal of the H/sub 2/S by evacuation of the reaction mixture readily regenerated the catalyst's activity toward a fresh mixture of thiophene and hydrogen. The product cis-2-butene had no effect on the activity of the catalysts. 27 references.
- Research Organization:
- Univ. of California, Berkeley (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5327475
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 106:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thiophene hydrodesulfurization over transition metal surfaces: structure insensitive over molybdenum and structure sensitive over rhenium
The role of adatoms (C,S) and surface structure in thiophene hydrodesulfurization over transition metal surfaces: A surface science and catalytic study
Mechanisms of thiophene hydrodesulfurization on model molybdenum catalysts
Journal Article
·
Thu Mar 31 23:00:00 EST 1988
· J. Catal.; (United States)
·
OSTI ID:5204536
The role of adatoms (C,S) and surface structure in thiophene hydrodesulfurization over transition metal surfaces: A surface science and catalytic study
Technical Report
·
Mon Aug 01 00:00:00 EDT 1988
·
OSTI ID:6085390
Mechanisms of thiophene hydrodesulfurization on model molybdenum catalysts
Journal Article
·
Sat Aug 15 00:00:00 EDT 1998
· Journal of Catalysis
·
OSTI ID:659080
Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUTENES
CARBON
CARBON 14
CARBON ISOTOPES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEACTIVATION
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
EVEN-EVEN NUCLEI
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
METALS
MOLYBDENUM
NONMETALS
NUCLEI
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
RADIOISOTOPES
REGENERATION
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THIOPHENE
TRACER TECHNIQUES
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES
020400* -- Petroleum-- Processing
ALKENES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUTENES
CARBON
CARBON 14
CARBON ISOTOPES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEACTIVATION
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
EVEN-EVEN NUCLEI
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
METALS
MOLYBDENUM
NONMETALS
NUCLEI
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
RADIOISOTOPES
REGENERATION
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THIOPHENE
TRACER TECHNIQUES
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES