Moessbauer and magnetic studies of bifunctional medium-pore zeolite-iron catalysts used in synthesis gas conversion

Conference · Tue Jul 22 04:00:00 EDT 1980 · Adv. Chem. Ser.; (United States)

OSTI ID:6408612

Lo, C ^[1]; Rao, K R.P.M.; Mulay, L N; Rao, V U.S.; Obermyer, R T; Gormley, R J

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1. Pennsylvania State Univ., University Park

Medium-pore (diameter approx. 6 A) zeolites such as ZSM-5 and Silicalite impregnated with Group VIII metals provide selective catalytic pathways for the conversion of coal-derived synthesis gas to gasoline or olefins. Moessbauer and magnetic studies on these catalysts containing iron or iron plus cobalt are reported. The zeolites were impregnated with metal nitrate solutions, reduced, and carbided to yield the active catalyst. The freshly impregnated samples showed Fe/sup 3 +/ type spectra. The ZSM-5 (14.7% Fe) and Silicalite (13.6% Fe) samples exposed to H/sub 2/(450/sup 0/C) showed an approximate 85% reduction to the metallic state. The carbided ZSM-5 (14.7% Fe) revealed a spectrum of Hagg carbide (Fe/sub 5/C/sub 2/), an active component of the catalyst. The used catalysts showed mixtures of Hagg carbide (Fe/sub 5/C/sub 2/) and cementite (Fe/sub 3/C). It is suggested that the selectivity of ZSM-5 (5.6% Fe, 4.5% Co) resulted from iron-cobalt alloy formation. 11 figures, 3 tables.

• OSTI ID: 6408612
• Conference Information: Journal Name: Adv. Chem. Ser.; (United States) Journal Volume: 194
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010500 -- Coal
Lignite
& Peat-- Products & By-Products
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKENES
AROMATICS
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COBALT
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FUELS
GASES
GASOLINE
HYDROCARBONS
HYDROGEN
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON
IRON CARBIDES
IRON COMPOUNDS
LIQUID FUELS
MAGNETIZATION
MATERIALS
METALS
METHANATION
MINERALS
MOESSBAUER EFFECT
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PRODUCTION
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS GAS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS
ZEOLITES