Effect of reduction temperature, carbiding, and sulfur poisoning on the methanation activity of Raney nickel
Technical Report
·
OSTI ID:7177976
The effects of reduction temperature, carbiding and sulfur poisoning on the methanation activity of Raney nickel were investigated. A combination of techniques such as BET surface areas, H/sub 2/ and CO chemisorption, ESCA measurements and activity tests were used to characterize the catalyst before and after deactivation. The following reductions in catalytic activity, as determined in a pulse microreactor at 320/sup 0/C, were observed for the deactivated samples. Initial heating of the catalyst for 3-/sup 1///sub 2/ hours at 500/sup 0/C and 1 hour at 600/sup 0/C in 8 percent H/sub 2/ in helium lowered CO conversion by 12 and 24 percent, respectively, when compared to a sample that was reduced for 1 hour at 400/sup 0/C. The methanation activity of Raney nickel at 320/sup 0/C was drastically lowered following a precarbiding treatment at 263/sup 0/C. Surface poisoning with H/sub 2/S caused a greater reduction in methanation activity than that attributed to the corresponding decrease in free nickel surface area. A surface carbide and sulfur species were observed by ESCA measurements on samples that were deactivated by carbiding and H/sub 2/S poisoning.
- Research Organization:
- Department of Energy, Pittsburgh, Pa. (USA). Pittsburgh Energy Research Center
- OSTI ID:
- 7177976
- Report Number(s):
- PERC/RI-78/2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CARBIDES
CARBON COMPOUNDS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DEACTIVATION
ELECTRON SPECTROSCOPY
ELEMENTS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METALS
METHANATION
NICKEL
NICKEL CARBIDES
NICKEL COMPOUNDS
POISONING
SERVICE LIFE
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
SYNTHESIS GAS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
010404* -- Coal
Lignite
& Peat-- Gasification
CARBIDES
CARBON COMPOUNDS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DEACTIVATION
ELECTRON SPECTROSCOPY
ELEMENTS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METALS
METHANATION
NICKEL
NICKEL CARBIDES
NICKEL COMPOUNDS
POISONING
SERVICE LIFE
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
SYNTHESIS GAS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS