CO + H/sub 2/ reaction over nitrogen-modified iron catalysts. Quarterly technical progress report, April 1, 1983-June 30, 1983

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6015793

Delgass, W N

The objective of this work is to examine the effects of nitrogen, as nitride and as a gas-phase reactant, on hydrocarbon synthesis reactions over iron catalysts. This is the third quarterly period of a three-year program. Procedures for preparing the pure ..gamma..'-Fe/sub 4/N and zeta-Fe/sub 2/N bulk phases have been refined and these phases have been confirmed by Moessbauer spectroscopy. After four hours of Fischer-Tropsch reaction with a 3/1 mixture of H/sub 2//CO at 523 K both unsupported nitrides form new phases, presumably carbonitrides, retaining little of the original nitride structure. A pure ..gamma..' - Fe/sub 4/N was prepared from a highly dispersed iron on carbolac. Moessbauer spectrum of this sample after reaction showed considerable retention of the nitride phase. The stability of this catalyst was further reflected in a steady reactivity and selectivity during synthesis, in contrast to the gradual activity loss over the unsupported catalysts. Kinetic measurements suggest a hydrogen deficient surface during the first minutes of exposure to synthesis gas. These preliminary studies identify the short time behavior of the catalysts as worthy of more thorough study by transient methods. 6 figures, 1 table.

• Research Organization: Purdue Univ., Lafayette, IN (USA). School of Chemical Engineering
• DOE Contract Number: FG22-82PC50804
• OSTI ID: 6015793
• Report Number(s): DOE/PC/50804-3; ON: DE83016747
• Country of Publication: United States
• Language: English

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ALKANES
ALKENES
AMMONIA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
FLUIDS
GASES
HIGH TEMPERATURE
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
IRON
IRON COMPOUNDS
IRON NITRIDES
KINETICS
METALS
MOESSBAUER EFFECT
NITRIDATION
NITRIDES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PNICTIDES
REACTION KINETICS
RESEARCH PROGRAMS
SPECTROSCOPY
SYNTHESIS
SYNTHESIS GAS
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS