Catalytic functionalities of supported sulfides V. C-N bond hydrogenolysis selectivity as a function of promoter type

Journal Article · Thu Sep 01 00:00:00 EDT 1988 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(88)90249-7· OSTI ID:6571766

Shabtai, J; Balusami, K; Nag, N K; Massoth, F E ^[1]; Guohe, Que ^[2]

---

1. Univ. of Utah, Salt Lake City (USA)
2. East China Petroleum Institute, Dongying, Shandong (China)

Two types of {gamma}-Al{sub 2}O{sub 3}-supported catalyst were prepared and their selectivities for C-N bond hydrogenolysis determined. These were (a) sulfided MMo catalysts (where M = Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Re, or Cr), containing 25 mmol M and 77 mmol Mo/100 g Al{sub 2}O{sub 3}; and (b) sulfided M catalysts, without Mo, containing 25 mmol M/100 g Al{sub 2}O{sub 3}. Pseudo-first-order rate constants for C-N bond hydrogenolysis of indole (k{sub 1}) and ring hydrogenation of naphthalene (k{sub 2}) were determined (at 350{degree}C and 137 atm H{sub 2} pressure) for the above catalysts as a function of the periodic table position of M. It was found that the C-N hydrogenolysis vs ring hydrogenation selectivity of the MMo catalysts, as expressed by the k{sub 1}/k{sub 2} ratio, was in the order RuMo > IrMo > CrMo > PtMo > CoMo > FeMo > NiMo > ReMo > RhMo > PdMo. RhMo, NiMo, and CoMo show highest C-N hydrogenolysis activity, but relatively low selectivity due to their high ring hydrogenation activity. The sulfided M catalysts, except Pt and Pd, showed markedly lower C-N hydrogenolysis activities than the corresponding MMo catalysts. Comparison of the actual C-N hydrogenolysis activities of MMo catalysts with their additive activities shows that Ni, Rh, Co, Fe, and Ru strongly promote, whereas Pt and Pd strongly depress the C-N hydrogenolysis activity of the corresponding MMo catalysts. Similar promoting (or depressing) effects of the M components are also observed in comparing the actual and additive ring hydrogenation activities of the MMo catalysts. The high C-N hydrogenolysis selectivity of RuMo, IrMo, and PtMo points to the possible use as improved catalysts in HDN of heavy oils, involving lower hydrogen consumption than that found with conventional Ni- and Co-promoted catalysts. 27 refs.

• OSTI ID: 6571766
• Journal Information: Journal of Catalysis; (USA), Vol. 113:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CHROMIUM
CATALYTIC EFFECTS
COBALT
CYCLOALKANES
HYDROGENATION
INDOLES
DEHYDROGENATION
IRIDIUM
IRON
MOLYBDENUM
NICKEL
PALLADIUM
PLATINUM
RHENIUM
RHODIUM
RUTHENIUM
SULFIDES
ALUMINIUM OXIDES
BIMETALS
CARBON
CATALYST SUPPORTS
CHEMICAL BONDS
CHROMIUM SULFIDES
CLEAVAGE
COBALT SULFIDES
COMPARATIVE EVALUATIONS
DESULFURIZATION
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGEN
IRIDIUM COMPOUNDS
IRON SULFIDES
NICKEL SULFIDES
NITROGEN
PALLADIUM SULFIDES
PETROLEUM
PLATINUM SULFIDES
PROMOTERS
RHENIUM SULFIDES
RHODIUM SULFIDES
RUTHENIUM SULFIDES
VISCOSITY
ALKANES
ALUMINIUM COMPOUNDS
AROMATICS
AZAARENES
AZOLES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
COBALT COMPOUNDS
CRYSTAL STRUCTURE
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IRON COMPOUNDS
METALS
MICROSTRUCTURE
NICKEL COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM COMPOUNDS
PLATINUM COMPOUNDS
PLATINUM METALS
PYRROLES
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
RHODIUM COMPOUNDS
RUTHENIUM COMPOUNDS
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
020400* - Petroleum- Processing