Studies of the mechanism of thiophene hydrodesulfurization: Conversion of 2,3- and 2,5-dihydrothiophene and model organometallic compounds

Journal Article · Mon May 01 00:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90240-6· OSTI ID:6352120

Sauer, N N; Markel, E J; Schrader, G L; Angelici, R J ^[1]

---

1. Iowa State Univ., Ames (USA)

Catalytic hydrodesulfurization (HDS), the process by which organically bound sulfur is removed from crude oils, is one of the largest-scale chemical processes practiced in the world. Thiophene is typical of the organosulfur compounds found in petroleum, and considerable effort has been directed toward investigating the mechanism for thiophene hydrodesulfurization. Recently, the authors have reported new kinetic information involving the HDS of thiophene, 2,3- and 2,5- dihydrothiophenes, and tetrahydrothiophene. These studies were performed with both Re/{gamma}-Al{sub 2}O{sub 3} and Mo/{gamma}-Al{sub 2}O{sub 3} catalysts using a flow microreactor system; in particular, rhenium studies provided new information data concerning reaction intermediates. They have also been able to prepare and characterize thiophene-related organometallic compounds which serve as plausible models for bonding and conversion on catalytic surfaces. The combination of these studies has led to new insights concerning alternate mechanistic pathways for thiophene HDS. This comprehensive mechanism, which is based on kinetic studies using model HDS catalysts and on the synthesis and characterization of relevant transition metal complexes, is offered as a plausible route for thiophene HDS.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6352120
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 117:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPLEXES
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
KINETICS
MATHEMATICAL MODELS
METALS
MOLYBDENUM
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
POLYCYCLIC SULFUR HETEROCYCLES
REACTION KINETICS
RHENIUM
THIOPHENE
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS