Acidity and catalytic activity of MeAPSO-34 (Me = Co, Mn, Cr), SAPO-34, and H-ZSM-5 molecular sieves in methanol dehydration

Journal Article · Mon Jun 01 00:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90051-I· OSTI ID:7189389

Hocevar, S ^[1]; Levec, J ^[2]

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1. Boris Kidric Inst. of Chemistry, Ljubljana (Slovenia)
2. 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), Vol. 135:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CHROMIUM
CATALYTIC EFFECTS
COBALT
MANGANESE
METHANOL
DEHYDRATION
MOLECULAR SIEVES
ZEOLITES
ALKENES
BIOMASS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
COAL
COKE
COMPARATIVE EVALUATIONS
DEPOSITION
DESORPTION
ETHYLENE
METHYL ETHER
NATURAL GAS
PH VALUE
SYNTHESIS
SYNTHESIS GAS
TEMPERATURE CONTROL
ADSORBENTS
ALCOHOLS
CARBONACEOUS MATERIALS
CONTROL
ELEMENTS
ENERGY SOURCES
ETHERS
EVALUATION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REACTION KINETICS
RENEWABLE ENERGY SOURCES
SILICATE MINERALS
SORPTION
TRANSITION ELEMENTS
100200* - Synthetic Fuels- Production- (1990-)