Conversion of methanol to hydrocarbons over ZSM-5 zeolite: an examination of the role of aromatic hydrocarbons using /sup 13/carbon and deuterium-labeled feeds

Journal Article · Thu Dec 01 04:00:00 EST 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90014-3· OSTI ID:6157159

Mole, T; Bett, G; Seddon, D

A mechanism is suggested for the acceleration by aromatic hydrocarbons of zeolite-catalyzed methanol conversion. According to this mechanism, the aromatic hydrocarbon undergoes successive ring methylation, prototropic conversion to an exo-methylene-cyclohexadiene, side-chain methylation, and ring de-ethylation. The overall result is that two methanol molecules give an ethylene molecule. The mechanism is supported by various reactions observed over ZSM-5 catalyst at methanol conversion temperatures: (I) deuteration of p-xylene by D/sub 2/O in the ring and methyl positions; (II) de-alkylation of p-ethyltoluene and n-propylbenzene; and (III) incorporation of the aromatic carbon of benzenes and alkylbenzenes into ethylene product, as revealed by /sup 13/C-labeling studies. 3 tables.

• Research Organization: Univ. of Melbourne, Parkville, Australia
• OSTI ID: 6157159
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 84:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
090210 -- Alcohol Fuels-- Properties-- (1976-1989)
10 SYNTHETIC FUELS
2-METHYLPROPANE
ALCOHOLS
ALKANES
ALKENES
ALKYLATED AROMATICS
AQUEOUS SOLUTIONS
AROMATICS
BENZENE
CARBON 13
CARBON ISOTOPES
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DEUTERIUM
DEUTERIUM COMPOUNDS
DISPERSIONS
ETHYLENE
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HEAVY WATER
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MASS SPECTRA
MATERIALS
MEDIUM TEMPERATURE
METHANOL
MINERALS
MIXTURES
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROPANE
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
SPECTRA
STABLE ISOTOPES
SYNTHESIS
TEMPERATURE DEPENDENCE
TOLUENE
TRACER TECHNIQUES
WATER
XYLENE-PARA
XYLENES
ZEOLITES