Alloy catalysts with monolith supports for methanation of coal-derived gases. Final technical progress report, September 20, 1977-September 20, 1980
The activity, selectivity and stability of alumina-supported nickel and nickel bimetallics in methanation of CO was investigated. Support geometry, in situ H/sub 2/S poisoning tests, and carbon deposition tests initiated during the previous contract were completed. The results show that: (1) at high conversions and high through-put conditions monolithic supported catalysts are more active than pellet supported catalysts; (2) Ni-MoO/sub 3/ is more active and sulfur resistant than Ni, and (3) in carbon deposition tests Ni-Pt and Ni-Co maintain catalytic activity longer than Ni. High temperature reactor tests reveal that catalysts prepared in this laboratory are more active and in some cases more thermally stable than commercial catalysts and that carbon deposition is a major factor but not the only factor causing deactivation at high temperatures. A comprehensive investigation of methanation kinetics over nickel (and to a lesser extent ruthenium) and deactivation by carbon was conducted. The results provide significant insights into the mechanisms of the reaction and the deactivation by carbon. Effects of temperature, H/sub 2/S concentration, and other reaction variables on the sulfur poisoning rate of nickel during methanation were also investigated. The results provide a basis for modeling the deactivation process and predicting catalyst life. These and other significant results are presented and discussed.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA)
- DOE Contract Number:
- AS01-77ET10505
- OSTI ID:
- 6835858
- Report Number(s):
- FE-2729-11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
ALLOYS
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL GASIFICATION
COBALT
COMPARATIVE EVALUATIONS
DATA
DEACTIVATION
DEPOSITION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
GASIFICATION
INFORMATION
METALS
METHANATION
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NICKEL
NICKEL ALLOYS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PLATINUM
PLATINUM METALS
REFRACTORY METALS
RUTHENIUM
SPECIFICITY
SYNTHESIS
SYNTHESIS GAS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS