Moessbauer spectroscopic and related characterization of Fischer-Tropsch catalysts. Final report

Technical Report · Sun Aug 01 04:00:00 EDT 1982

OSTI ID:5496167

Mulay, L N

This work was undertaken using Moessbauer spectroscopy to characterize supported iron catalysts such as Fe/ZSM-5, Fe/Silicalite, and Fe/Mordenite in the synfuel gas reaction. The conclusions are as follows: (1) The catalysts prepared using Fe/sub 3/(CO)/sub 12/ impregnation on ZSM-5 showed ..gamma..-Fe/sub 2/O/sub 3/ with better dispersion and smaller particle size which led to high surface area. (2) The H/sub 2/ flow rate varied the Fe/sub 3/O/sub 4/ content at the reduction stage. Under normal reduction conditions, the reduction is completed in two hours. High H/sub 2/ flow is suggested in order to obtain complete reduction. (3) The carbided catalyst with carbonyl impregnation showed no phase change in the synfuel gas reaction. This confirmed that the catalysts were very stable and the activity obtained from PETC samples at 300/sup 0/C was mainly due to the temperature effect. (4) Low activity of iron on Mordenite catalyst resulted possible from the extensive oxidation of the carbided catalyst. (5) The catalysts prepared using Fe/sub 3/(CO)/sub 12/ impregnation on Mordenite with various SiO/sub 2//Al/sub 2/O/sub 3/ ratio showed ..gamma..-Fe/sub 2/O/sub 3/ with various isomer shift arising from the change of chemical environment. This is an evidence of strong metal support interaction (SMSI) due to the acidity of the catalyst support. 9 references, 17 figures, 3 tables.

• Research Organization: Pennsylvania State Univ., University Park (USA). Materials Research Lab.
• DOE Contract Number: AC22-81PC41265
• OSTI ID: 5496167
• Report Number(s): DOE/PC/41265-T1; ON: DE84001112
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBONYLS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
GAMMA SPECTROMETERS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPOUNDS
IRON OXIDES
MATERIALS
MEASURING INSTRUMENTS
MINERALS
MOESSBAUER EFFECT
MOESSBAUER SPECTROMETERS
MORDENITE
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICA
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SPECTROMETERS
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ZEOLITES