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

Technical Report · Fri Dec 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6326267· OSTI ID:6326267

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

A sample preparation and gas treatment system has been assembled and attached to the ESCA spectrometer. This system will allow catalysts to be reduced, gas treated, and then analyzed without being exposed to air. A sulfided Ni--Cr/MgAl/sub 2/O/sub 4/ catalyst has been found to be chemically similar to a similarly treated Ni--Cr/MgSiO/sub 3/. The SO/sub 4//S ratio is 10% higher in the MgAl/sub 2/O/sub 4/ supported catalyst. The sulfur uptake is also somewhat higher in this catalyst. Raman spectra of CO adsorbed on Ni(110) and Ni(111) at -60/sup 0/C show multiple CO bands in the 2020 to 2032 cm/sup -1/ region. The bands are assigned to linear bonded CO. Raman spectra of O/sub 2/ on Ni(111) have also been obtained with temperatures in the -130 to 0/sup 0/C range. Initial runs with a Ni(111) single crystal specimen have produced preliminary LEED and AES data on a clean Ni(111) surface, sulfur poisoned Ni(111), and sulfur poisoned Ni(111) with CO adsorption. Preliminary studies on the sintering rate of a silica supported nickel catalyst (C150-1-01) in an atmosphere of hydrogen indicate that the rate is more rapid under hydrogen than under a nitrogen atmosphere. Alumina supported catalysts that are heated at 500/sup 0/C for 24 hours are found to be less easily reduced subsequently, in comparison with samples that are reduced without a prior heat treatment.

• Research Organization: Kentucky Univ., Lexington (USA)
• OSTI ID: 6326267
• Report Number(s): FE-2229-11
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
COAL GASIFICATION
CRYOGENIC FLUIDS
DEACTIVATION
ELECTRON SPECTROSCOPY
ELEMENTS
EVALUATION
FABRICATION
FLUIDS
GASIFICATION
METALS
NICKEL
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POISONING
RAMAN SPECTRA
SINTERING
SORPTION
SPECTRA
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS