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Título : Absolute surface coverage of tunsten-alumina catalysts
Otros títulos : Cobertura superficial absoluta de catalizadores de tungsteno-alúmina
Autor : Pfaff, Carolina
Pérez Zurita, M.J
Scott, Carlos
Goldwasser, Mireya
Goldwasser, J
Mulcahy, F,M
Houalla, M
Hercules, D.M
Palabras clave : Tungsten
absolute surface coverage
ISS
low-temperature CO adsortion
Fecha de publicación : 20-Sep-1997
Editorial : Catalysis Letters
Citación : Catalysis Letters 49(1997)13-16
Resumen : Absolute surface coverages ( ) of a series of tungsten^alumina catalysts prepared by the equilibrium adsorption method were determined by ion scattering spectroscopy (ISS) and low-temperature CO adsorption. The CO values for theWcatalysts were very similar to those obtained with the ISS method, for a given W loading. A linear increase in Wcoverage with increasingW loading, reaching 55%coverage for the 13.1%Wsolid,was observed. The calculatedWcross-sections (22.0^24.5Ð2/W)were in agreement with other reports in the literature. Due to the inherent limitations of each method, the combined use of ISS and low-temperature COadsorption is recommended for estimating absolute surface coverages in tungsten^alumina catalysts.
URI : http://hdl.handle.net/123456789/14182
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