Activity of nickel on sodium-neutralized silica-alumina

Book · Sun Jan 01 04:00:00 EST 1978

OSTI ID:5276384

Huang, C Y.P.

Magnetic measurements on a series of 8% nickel/silica-alumina catalysts containing up to 2.37% by wt pre-impregnated sodium showed that the extent of reduction and the nickel crystallite size were unaffected by the sodium on the support. Hydrogen adsorption measurements showed that the exposed surfaces agreed with the crystallite sizes and were not significantly poisoned by the sodium. Differential reactor studies of carbon monoxide hydrogenation over these catalysts showed that the turnover number increased with sodium content and passed through a maximum at 0.3% sodium with an enhancement factor of six. Pulse reactor studies of cumene dealkylation, benzene hydrogenation, ethane hydrogenolysis, and cyclopropane hydrogenation/hydrogenolysis indicated that the support acidity decreased with sodium neutralization; benzene hydrogenation and ethane hydrogenolysis were unaffected; and cyclopropane conversion and selectivity to hydrogenation decreased considerably with increasing sodium content. Poisoning titration with hydrogen sulfide showed moderate changes in the site concentration and isomerization on the support.

• OSTI ID: 5276384
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METALS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BENZENE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
CUMENE
CYCLOALKANES
DEALKYLATION
DECOMPOSITION
ELEMENTS
HYDROCARBONS
HYDROCRACKING
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
ISOMERIZATION
METALS
NICKEL
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POISONING
PROPANE
PYROLYSIS
REDUCTION
SILICON COMPOUNDS
SILICON OXIDES
SODIUM
SORPTION
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS