Structure and catalytic properties of Fe-Mo and Fe-Ni catalysts for the synthesis of ammonia
The structure of Fe-Mo and Fe-Ni binary catalysts of various composition, which are active in the synthesis of ammonia, has been investigated by the methods of ..gamma..-resonance spectroscopy, x-ray diffraction analysis, and x-ray photoelectron spectroscopy. An extremum dependence of the specific activity and the formation of the structure of the interstitial solid solution of nitrogen in ..gamma..-Fe on the composition with a maximum at Mo/Fe approx. 0.55 has been noted for the Fe-Mo system. The specific activity of the Fe-Ni catalyst decreases with increasing nickel concentrations and then passes through a maximum. A model which accounts for the decrease in the activity of the catalyst by attributing it to a decrease in the number of C/sub 7/ iron active sites has been proposed.
- Research Organization:
- Inst. of Chemical Physics, Moscow, USSR
- OSTI ID:
- 6211460
- Journal Information:
- Kinet. Catal. (Engl. Transl.); (United States), Vol. 21:6; Other Information: Translated from Kine. Katal.; 21: No. 6, 1555-1558(Nov 1980)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIA
SYNTHESIS
IRON
CATALYTIC EFFECTS
STRUCTURAL CHEMICAL ANALYSIS
MOLYBDENUM
NICKEL
ALPHA SPECTROSCOPY
BINARY MIXTURES
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
PHOTOELECTRON SPECTROSCOPY
X-RAY DIFFRACTION
COHERENT SCATTERING
DATA
DIFFRACTION
DISPERSIONS
ELECTRON SPECTROSCOPY
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
METALS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
REFRACTORY METALS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENTS
090320* - Inorganic Hydrogen Compound Fuels- Preparation- (1976-1989)
400201 - Chemical & Physicochemical Properties