Adsorption of carbonyl sulfide on nickel and tungsten films
The interaction of carbonyl sulfide with evaporated nickel and tungsten films has been investigated in the temperature range 195-450 K using gas pressures ranging from 1 to 13 N m/sup -2/. Rapid but mainly associative chemisorption of COS occurred on both metals at 195 K. Further adsorption of COS on W at temperatures 293-450 K was extremely slow and accompanied by more CO desorption than COS adsorbed. Sulfidation of Ni film by COS occurred at temperatures greater than or equal to 293 K with the liberation of carbon monoxide. The rate of adsorption increased with temperature but was independent of COS pressure. The activation energy (E/sub x/) increased with extent (X) of sulfidation to a limiting value of 97 kJ mol/sup -1/. A linear relationship was obtained from the plot of E/sub x/ against 1/X, suggesting the applicability of Cabrera-Mott theory to the sulfidation of Ni film by COS. 20 references, 2 figures, 1 table.
- Research Organization:
- Univ. of Baghdad, Iraq
- OSTI ID:
- 6487105
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 89:15
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBONYLS
ADSORPTION
NICKEL
SORPTIVE PROPERTIES
SULFIDATION
SULFIDES
TUNGSTEN
ACTIVATION ENERGY
CARBON MONOXIDE
CATALYSIS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
FILMS
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY
INFORMATION
KINETICS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SORPTION
SULFUR COMPOUNDS
SURFACE PROPERTIES
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties