Acidity and catalytic activity of MeAPSO-34 (Me = Co, Mn, Cr), SAPO-34, and H-ZSM-5 molecular sieves in methanol dehydration
- Boris Kidric Inst. of Chemistry, Ljubljana (Slovenia)
- Univ. of Ljubljana (Slovenia)
SAPO-34 and the isomorphously substituted MeAPSO-34 (Me = Co, Mn, Cr) molecular sieves have been synthesized. Temperature-programmed desorption (TPD) profiles and the reaction rates of methanol dehydration have been measured on these samples in comparison with H-ZSM-5. The acidity strength of samples has been determined qualitatively from the temperatures of dimethyl ether desorption peaks, and the following sequence has been obtained: H-ZSM-5 > MnAPSO-34 > CoAPSO-34 > CrAPSO-34 > SAPO-34. The following sequence of catalytic acitivty has been observed: H-ZSM-5 [much gt] SPAO-34 > CrAPSO-34 > CoAPSO-34 > MnAPSO-34. The selectivities for the formation of low olefines have been observed to decrease rapidly with time on stream for all catalysts in the SAPO-34 and MeAPSO-34 series as a consequence of coking. The highest selectivity to ethane production among these catalysts has been found for MnAPSO-34.
- OSTI ID:
- 7189389
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 135:2; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
100200* -- Synthetic Fuels-- Production-- (1990-)
ADSORBENTS
ALCOHOLS
ALKENES
BIOMASS
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHROMIUM
COAL
COBALT
COKE
COMPARATIVE EVALUATIONS
CONTROL
DEHYDRATION
DEPOSITION
DESORPTION
ELEMENTS
ENERGY SOURCES
ETHERS
ETHYLENE
EVALUATION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MANGANESE
MATERIALS
METALS
METHANOL
METHYL ETHER
MINERALS
MOLECULAR SIEVES
NATURAL GAS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PH VALUE
REACTION KINETICS
RENEWABLE ENERGY SOURCES
SILICATE MINERALS
SORPTION
SYNTHESIS
SYNTHESIS GAS
TEMPERATURE CONTROL
TRANSITION ELEMENTS
ZEOLITES