Synthesis and catalytic properties of products obtained by sulfiding ternary oxide compounds of Ni, Mo, and Al in hydrogenation and hydrodesulfurization reactions

Journal Article · Sun Feb 01 00:00:00 EST 1987 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:5845541

Landau, M V; Mikhailov, V I; Tsisun, E L; Samgina, T Yu; Chukin, G D; Vinogradova, O V; Nefedov, B K; Slinkin, A A

It has been shown that coprecipitation of Ni, Mo, and Al salts in an alkaline medium with subsequent heat treatment will yield an amorphous nickel aluminomolybdate with the composition Ni(Al/sub x/MoO/sub 4+1.5x/) (x = 0.2-1.0), which, when heated to 973 K, crystallizes into a phase that is isostructural with ..beta..-NiMoO/sub 4/ and is stable after cooling. In an acidic medium, a nickel heteropolymoybdate is obtained with the composition Ni(AlMo/sub 6/O/sub 24/H/sub 7/); this breaks down with the segregation of NiMoO/sub 4/, Al/sub 2/(MoO/sub 4/)/sub 3/, and MoO/sub 3/ at temperatures greater than or equal to 773 K. The double molybdate of Ni and Al that is formed upon fusion of the components (1313 K0 breaks down upon cooling below 1178 K, with the segregation of ..cap alpha..-NiMoO/sub 4/, MoO/sub 3/, and Al/sub 2/(MoO/sub 4/)/sub 3/. The catalytic properties of the products obtained by sulfiding the nickel aluminomolybdate, the nickel heteropolymolybdate, NiMoO/sub 4/, Al/sub 2/(MoO/sub 4/)/sub 3/, NiO, MoO/sub 3/, and supported Al-Ni-Mo catalysts have been compared in reactions of o-xylene hydrogenation and thiphene hydrodesulfurization. It is concluded that the maximum activity and selectivity in the hydrodesulfurization reaction are shown by the product from sulfiding the ternary oxide compound of Ni, Mo, and Al, which does not have any bulk analog and which consists of conjugated fragments of aluminum molybdate and nickel aluminate on the surface of the aluminum oxide support.

• OSTI ID: 5845541
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Vol. 27:4; Other Information: Translated from Kinet. Katal.; 27: No. 8, 931-941(Jul-Aug 1986)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CATALYTIC EFFECTS
SULFIDATION
SYNTHESIS
CATALYSTS
COMPARATIVE EVALUATIONS
MOLYBDENUM OXIDES
NICKEL OXIDES
OXYSULFIDES
THIOPHENE
DESULFURIZATION
HETEROGENEOUS CATALYSIS
XYLENES
HYDROGENATION
CALCINATION
COPRECIPITATION
CRYSTALLIZATION
HETEROPOLYANIONS
MOLYBDATES
PHASE STUDIES
RAMAN SPECTRA
X-RAY DIFFRACTION
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ANIONS
AROMATICS
CATALYSIS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
COHERENT SCATTERING
COMPLEXES
DECOMPOSITION
DIFFRACTION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IONS
MOLYBDENUM COMPOUNDS
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PRECIPITATION
PYROLYSIS
REFRACTORY METAL COMPOUNDS
SCATTERING
SEPARATION PROCESSES
SPECTRA
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies