6533b7cffe1ef96bd1258c8e
RESEARCH PRODUCT
Surface Study of Pumice Supported Nickel Catalysts Used in the Hydrogenation of CO
Antonella GlisentiGiulio DeganelloA.m. Veneziasubject
inorganic chemicalsInorganic chemistrychemistry.chemical_elementlaw.inventionCatalysisMetalNickelChemical statechemistry.chemical_compoundchemistryX-ray photoelectron spectroscopylawvisual_artvisual_art.visual_art_mediumCalcinationAtomic ratioCarbon monoxidedescription
A series of pumice supported nickel catalysts used in the CO hydrogenation reaction were characterised by X-ray photoelectron spectroscopy. Qualitative and quantitative analysis of the XPS peaks have shown the effect of the calcination conditions on the chemical state of the nickel before hydrogenation and the particle size of the metal after reduction. Calcination at high temperature determined enrichment of sodium ions on the surface of the support and also on the metal particles. After exposure to the gas mixture CO/H2, formation of nickel carbides and other carbon species was checked. The correlation found between the surface atomic ratio Na/Si and the activity and selectivity of the catalysts in the hydrogenation of CO substantiated the role of the alkali ions naturally present in the pumice support.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-01-01 |