Kinetics of dibenzothiophene hydrodesulfurization
- Exxon Research and Engineering Co., Annondale, NJ (USA)
Hydrotreating is a process in which organically bound sulfur and nitrogen compounds are removed from petroleum feedstocks to produce processible, stable, and environmentally acceptable liquid fuels or lubes. Essentially two types of catalysts, which differ in composition, are in use in current refineries: one is sulfided CoO-MoO{sub 3}/{gamma}-Al{sub 2}O{sub 3}, the other sulfided NiO-MoO{sub 3}/Al{sub 2}O{sub 3}. The selection of these catalysts depends largely on the processing objectives and the nature of the feedstocks. Generally speaking, the NiMo catalysts are used for hydrodenitrogenation (HDN) and hydrodearomatization (HDA), while the CoMo catalysts are used for hydrodesulfurization (HDS). HDS of dibenzothiophene (DBT) is a useful model reaction for HDS of commercial middle distillate feedstocks. In a previous study, Ho et al. quantified the interactions between HDN and HDA on a commercial NiMo catalyst by using a feed mixture containing 2,4-dimethyl pyridine and 2-methylnaphthalene. With the same catalyst, here we determine the kinetics of DBT HDS. Another reason for undertaking the present study is that relatively little attention has been paid to DBT HDS on NiMo catalysts. Most published DBT HDS studies have been done on CoMo catalysts.
- OSTI ID:
- 5721215
- Journal Information:
- Journal of Catalysis; (USA), Vol. 128:2; ISSN 0021-9517
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MOLYBDENUM
CATALYTIC EFFECTS
NICKEL
POLYCYCLIC SULFUR HETEROCYCLES
DESULFURIZATION
ALUMINIUM OXIDES
BIMETALS
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CHEMICAL REACTION KINETICS
MEASURING METHODS
MOLYBDENUM OXIDES
MOLYBDENUM SULFIDES
NICKEL OXIDES
NICKEL SULFIDES
PETROLEUM
PETROLEUM DISTILLATES
REFINING
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
KINETICS
METALS
MOLYBDENUM COMPOUNDS
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM FRACTIONS
PROCESSING
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
020400* - Petroleum- Processing