Elucidation of the mechanism of conversion of methanol and ethanol to hydrocarbons on a new type of synthetic zeolite

Journal Article · Thu Jun 15 04:00:00 EDT 1978 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(78)90006-4· OSTI ID:6565884

Derouane, E G ^[1]; Nagy, J B; Dejaifve, P; van Hooff, J H.C.; Spekman, B P; Verdrine, J C; Naccache, C

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1. Universitaires de Namur, Belgium

/sup 13/C nuclear magnetic resonance and vapor-phase chromatography have been used to investigate the conversions of methanol and ethanol to hydrocarbons on a synthetic zeolite of the type H-ZSM-5 as described by Mobil. Methanol is first dehydrated to dimethyl ether and ethylene. Then the reaction proceeds by two competitive paths: first, successive dehydration-methanolation steps to give branched aliphatics, and, second, polycondensation reactions leading to linear aliphatic and aromatic compounds. The basic mechanism is essentially the same for ethanol, with the major difference being that ethylene can also be formed by direct dehydration of ethanol. At variance to earlier proposals, a mechanism involving carbenium ions is proposed which accounts well for the high yield in branched hydrocarbons and the observation of methyl ethyl ether which is detected in the methanol conversion products. 8 tables, 5 figures.

• OSTI ID: 6565884
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 53:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
ALKANES
ALKENES
AROMATICS
CARBENES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
DEHYDRATION
ETHANOL
ETHERS
ETHYLENE
GAS CHROMATOGRAPHY
HIGH TEMPERATURE
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MAGNETIC RESONANCE
METHANATION
METHANOL
METHYL ETHER
MINERALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
RADICALS
REACTION KINETICS
RESONANCE
SEPARATION PROCESSES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TEMPERATURE DEPENDENCE
YIELDS
ZEOLITES