Surface structure and mechanisms of gasification catalyst deactivation. Quarterly report, May 1--July 31, 1978

Technical Report · Wed Nov 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6369143· OSTI ID:6369143

Reucroft, P. J.; Bradley, E. B.; DeAngelis, R. J.; Sargent, G. A.

Laser spectral studies of the adsorption of CO, O/sub 2/, H/sub 2/ and D/sub 2/ on Ni(111) are discussed in relation to graphitic adlayers and Ni surface states. No definite conclusion is made on which of these mechanisms would produce the dispersion in ..delta nu.. observed with variation in excitation frequency. The adsorption cell which will be used during infrared reflection studies of adsorbed gases on Ni(111) is described. Criteria for its design indicate that the infrared cell should maximize spectral response while minimizing scattering losses. Further reduction experiments have been carried out to study the sintering behavior of catalyst C150-1-01. Data showing the effects of sintering temperature and times of sintering on the particle size distribution functions by x-ray line broadening analysis are presented and discussed. An upgrading of the capabilities of the ESCA spectrometer is described. A series of Cr compounds (Cr, Cr/sub 2/O/sub 3/, Cr(OH)/sub x/, Cr/sub 2/S/sub 3/, and Cr/sub 2/(SO/sub 4/)/sub 3/) have been examined. Analysis of the sulfided Ni--Cr/MgSiO/sub 3/ catalysts has continued. A simple model of the Ni/Al/sub 2/O/sub 3/ catalyst is proposed. Auger electron spectroscopy has been used to obtain adsorption isotherms for CO on a S poisoned Ni(111) single crystal surface. The anomalous behavior of the isotherm obtained at about 100/sup 0/C as compared to those obtained at both lower and higher temperatures, together with desorption data, was interpreted as showing that CO dissociates on the surface to form C and O.

• Research Organization: Kentucky Univ., Lexington (USA)
• OSTI ID: 6369143
• Report Number(s): FE-2229-10-T1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ADSORPTION
BINDING ENERGY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
COHERENT SCATTERING
CRYOGENIC FLUIDS
DEACTIVATION
DEUTERIUM
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FABRICATION
FLUIDS
GASIFICATION
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
METALS
METHANATION
NICKEL
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN
OXYGEN COMPOUNDS
SCATTERING
SINTERING
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
STABLE ISOTOPES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
X-RAY DIFFRACTION