Deactivation of methanol synthesis catalysts
- Air Products and Chemicals, Inc., Allentown, PA (United States)
A novel methanol synthesis process, the liquid-phase methanol (LPMEOH) process, has been developed and scaled up to a nominal 380 kg/h (10 ton/day) pilot plant. The process is based on a gas-sparged slurry reactor instead of a conventional, fixed-bed reactor. The use of slurry reactors, which are essentially gradientless, greatly facilitated the interpretation and quantification of catalyst deactivation phenomena. With a poison-free, CO-rich feedstream, the rate of deactivation of the Cu/ZnO catalyst increased rapidly with temperature. At constant temperature, in the absence of poisons, the decline with time in the rate constant for methanol synthesis correlated with the loss of BET surface area. Iron carbonyl, nickel carbonyl, and carbonyl sulfide are severe and highly specific poisons for methanol-synthesis catalyst. There was a linear relationship between the catalyst activity loss and the concentration of metal or sulfur on the catalyst.
- OSTI ID:
- 5891148
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:8; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBON OXYSULFIDE
CARBONYLS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION PLANTS
COAL LIQUEFACTION
COPPER
DEACTIVATION
ELEMENTS
FUNCTIONAL MODELS
INDUSTRIAL PLANTS
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LIQUEFACTION
LIQUID PHASE METHANOL PROCESS
METALS
METHANATION
NICKEL COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZINC COMPOUNDS
ZINC OXIDES