Preparation and properties of cubic ZrO2 stabilized with Ni(ii). Technical report

Technical Report · Fri May 15 04:00:00 EDT 1987

OSTI ID:6427794

Smith, K E; Kershaw, R; Dwight, K; Wold, A

The Fischer-Tropsch activity of the nickel-zirconia system has been investigated and preparations of the catalyst involving coprecipitation gave a significantly more active catalyst than did preparations involving impregnation. Stabilization towards reduction has been observed when certain transition-metal ions such as Rh(III) are inserted into the fluorite ZrO2 structure. Recent investigations using the NiO/ZrO2 system have concluded that NiO does not interact with zirconium oxide, but the materials were prepared by incipient wetness. It was the purpose of this study to investigate the formation of cubic ZrO2 stabilized with Ni(II) and to relate the structural properties of the catalyst with its observed stability in reducing atmospheres. These properties were then compared to those of catalysts prepared by incipient wetness. Changes in the structure of ZrO2 and in the temperatures at which reduction of Ni(II) to Ni metal occurred were then related to the relative strengths of the catalyst-support interaction.

• Research Organization: Brown Univ., Providence, RI (USA). Dept. of Chemistry
• OSTI ID: 6427794
• Report Number(s): AD-A-180314/7/XAB; TR-5
• Country of Publication: United States
• Language: English

Related Subjects

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& Peat-- Hydrogenation & Liquefaction
36 MATERIALS SCIENCE
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Cermets
& Refractories-- Preparation & Fabrication
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Cermets
& Refractories-- Physical Properties
CATALYSTS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
COPRECIPITATION
DECOMPOSITION
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
IMPREGNATION
IONS
METALS
MOLECULAR STRUCTURE
NICKEL
NICKEL COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
PYROLYSIS
SEPARATION PROCESSES
STABILIZATION
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES