Characterization of some iron catalysts for the reduction of carbon monoxide and the effect of residence time and temperature on the nature of carbon monoxide reduction products
Thesis/Dissertation
·
OSTI ID:7043449
Methanation studies have been carried out at 290C in a microreactor with a H/sub 2//CO ratio of 9/1. The catalysts studied were iron(III) oxide, iron(II) diiron(III) tetroxide, and metallic iron. These were all prepared reproducibly from iron(III) nitrate. The catalysts were characterized by x-ray diffraction and magnetic analysis both at maximum activity and after deactivation. All catalysts at maximum activity contained chi-Fe/sub 2/C/sub 2/. Deactivation of the catalysts was found to be due to excess graphitic carbon. Sustained catalytic activity was found to require the presence of iron(II) diiron(III) tetroxide, probably to serve as a source for continual renewal of the active catalyst surface. The reduction of carbon monoxide by hydrogen was carried out at ambient pressure in a microreactor using bulk iron(III) oxide as the catalyst. A technique was developed to study the effects of residence time and temperature on the carbon monoxide reduction products without changing the composition of the catalyst. The extent of hydrogenation of primary olefin products was found to decrease with increasing space velocity of the synthesis gas. Greater chain growth of hydrocarbon products was observed at lower temperature.
- Research Organization:
- Brown Univ., Providence, RI (USA)
- OSTI ID:
- 7043449
- Country of Publication:
- United States
- Language:
- English
Similar Records
Methanation studies: characterization of some iron catalysts by x-ray diffraction and Curie point determinations
Transient kinetic modeling of the ethylene and carbon monoxide oxidation over a commercial automotive exhaust gas catalyst
Kinetics and mechanisms of iron sulfide reductions in hydrogen and in carbon monoxide
Journal Article
·
Mon Jul 01 00:00:00 EDT 1985
· J. Solid State Chem.; (United States)
·
OSTI ID:5209033
Transient kinetic modeling of the ethylene and carbon monoxide oxidation over a commercial automotive exhaust gas catalyst
Journal Article
·
Tue Feb 29 23:00:00 EST 2000
· Industrial and Engineering Chemistry Research
·
OSTI ID:20019038
Kinetics and mechanisms of iron sulfide reductions in hydrogen and in carbon monoxide
Journal Article
·
Sat Oct 31 23:00:00 EST 1987
· J. Solid State Chem.; (United States)
·
OSTI ID:5522996
Related Subjects
01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ALKENES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COHERENT SCATTERING
DEACTIVATION
DEPOSITION
DIFFRACTION
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROCARBONS
HYDROGENATION
IRON
IRON COMPOUNDS
IRON OXIDES
KINETICS
MAGNETIC PROPERTIES
METALS
METHANATION
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SCATTERING
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ALKENES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COHERENT SCATTERING
DEACTIVATION
DEPOSITION
DIFFRACTION
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROCARBONS
HYDROGENATION
IRON
IRON COMPOUNDS
IRON OXIDES
KINETICS
MAGNETIC PROPERTIES
METALS
METHANATION
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SCATTERING
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION