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Surface structure and mechanisms of gasification catalyst deactivation. Quarterly report, August--October 1976. [Nickel coprecipitated catalysts]

Technical Report ·
DOI:https://doi.org/10.2172/7309851· OSTI ID:7309851
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The LEED-Auger system has been delivered and installed and preliminary studies to evaluate the capabilities of the Auger technique have been carried out. The ESCA studies on coprecipitated catalysts have continued. Studies have dealt with the oxygen 1s/sub /sup 1///sub 2// spectra that can be observed in catalyst samples and nickel oxide standard samples. Corrected binding energies, which allow for sample charging effects have been estimated for some of the standard samples. Additional work has been carried out to develop computer programs for evaluating intensity variations in diffracted beams that arise due to different atom types in the surface structures. An x-ray diffraction technique has been developed which allows calculation of the coherent diffracting particle size and mean square strain from a single diffraction profile. The effective particle size, obtained for unreduced catalysts in the as-received and sintered conditions by this method, is compared with those obtained from the half breadth of the profile and the initial slope of the Stokes' corrected cosine coefficients of the profile. Infrared spectra of unreduced catalysts dispersed in a KBr matrix have been obtained and compared with similar data obtained for standard samples. It is concluded that a significant fraction of the nickel is in the form of a complex silicate in the silica-supported catalysts.
Research Organization:
Kentucky Univ., Lexington (USA)
OSTI ID:
7309851
Report Number(s):
FE-2229-3
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AUGER ELECTRON SPECTROSCOPY
BINDING ENERGY
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL GASIFICATION
COHERENT SCATTERING
DEACTIVATION
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
GASIFICATION
INFRARED SPECTRA
METALS
METHANATION
NICKEL
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
RAMAN SPECTRA
SCATTERING
SPECTRA
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION