Oxide-supported metal carbonyls: novel catalysts for the liquefaction of coal. Final technical report
Coal liquefaction, hydrodesulfurization (HDS), and hydrodenitrogenation (HDN) catalysts have been investigated increasingly in recent years because of the need to understand how to develop more selective and stable materials for coal utilization. One catalyst that has been used extensively for HDS and subjected to numerous characterization and model reaction studies is Co-Mo/Al/sub 2/O/sub 3/. In these studies, the catalyst preparation technique has usually involved the incipient-wetness impregnation of ..gamma..-Al/sub 2/O/sub 3/ with ammonium molybdates and cobalt nitrates. Such a technique leads to a variety of surface species, bulk-like and monolayer forms, which have been described and can be controlled by alterations in the preparation techniques and materials. However, certain structural and chemical factors of the catalysts, e.g., Co and Mo reducibility and dispersion or surface speciation at low and high metal concentrations, seem to be independent of such alterations. To investigate whether these factors can be affected by preparation techniques and to develop oxide-supported, metal catalysts having controlled metal dispersions and speciation, a catalyst preparation technique using metal carbonyls with an extraction process to metal-load oxide supports has been developed (J.E. Crawford, G.A. Melson, L.E. Makovsky, F.R. Brown, J. Catal., 83: 454 (1983)). This report discusses the surface and bulk characterization, and presents initial HDS and liquefaction results, for these catalysts. 7 refs., 4 figs., 1 tab.
- Research Organization:
- Virginia Commonwealth Univ., Richmond (USA). Dept. of Chemistry
- DOE Contract Number:
- AC22-82PC53101
- OSTI ID:
- 5255018
- Report Number(s):
- DOE/PC/53101-T2; ON: DE85017995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
CATALYTIC EFFECTS
RAMAN SPECTRA
CATALYSTS
CHEMICAL PREPARATION
COAL LIQUEFACTION
COBALT OXIDES
DENITRIFICATION
DESULFURIZATION
HYDROGENATION
MOLYBDENUM OXIDES
CARBONYLS
CATALYST SUPPORTS
EXPERIMENTAL DATA
PHOTOELECTRON SPECTROSCOPY
RESEARCH PROGRAMS
X-RAY DIFFRACTION
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COHERENT SCATTERING
DATA
DIFFRACTION
ELECTRON SPECTROSCOPY
INFORMATION
LIQUEFACTION
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SCATTERING
SPECTRA
SPECTROSCOPY
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction