Modified ferrisilicates for synthesis gas conversion
Iron silicate (or ferrisilicate) molecular sieves with the ZSM-5 structure have been synthesized with SiO{sub 2}/Fe{sub 2}O{sub 3} varying from 20 to infinity (specifically 20, 50, 90, and 200) utilizing techniques developed in our laboratory. These materials were subsequently modified using combined thermal and hydrothermal treatment which yielded novel bifunctional iron oxide containing molecular sieves. Detailed characterization, both physical and catalytic, revealed the presence of very small clusters of iron oxide highly dispersed within the pore system of the ZSM-5 crystal structure. The size of the clusters formed and their location within the pores was found to be very sensitive to the SiO{sub 2}/Fe{sub 2}O{sub 3} ratio of the parent material, the temperature, the time of hydrothermal treatment and the quality of the molecular sieve crystals. As synthesis gas catalysts, these properly prepared modified iron silicates were shown to be highly active despite their low iron content and exhibited the desired selectivity for production of C8 hydrocarbons. 228 refs., 108 figs., 37 tabs.
- Research Organization:
- Georgia Inst. of Tech., Atlanta, GA (USA). Research Inst.
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC22-86PC90007
- OSTI ID:
- 6918385
- Report Number(s):
- DOE/PC/90007-T1; ON: DE90009553
- Country of Publication:
- United States
- Language:
- English
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10 SYNTHETIC FUELS
36 MATERIALS SCIENCE
FISCHER-TROPSCH SYNTHESIS
CATALYSTS
IRON
SPATIAL DISTRIBUTION
IRON SILICATES
CATALYTIC EFFECTS
MOLECULAR SIEVES
EVALUATION
MICROSTRUCTURE
STYRENE
CHEMICAL REACTION YIELD
TOLUENE
DEHYDROGENATION
COMPARATIVE EVALUATIONS
MASS TRANSFER
PHYSICAL PROPERTIES
POROSITY
PROGRESS REPORT
SPECIFICITY
SYNTHESIS
SYNTHESIS GAS
ZEOLITES
ADSORBENTS
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DISTRIBUTION
DOCUMENT TYPES
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPOUNDS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS
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