Coadsorption of toluene and methanol on HZSM-5 zeolites

Journal Article · Thu May 02 04:00:00 EDT 1991 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100162a055· OSTI ID:6014072

Mirth, G; Lercher, J A ^[1]

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1. Technische Univ. Wien (Austria)

Coadsorption of toluene and methanol on HZSM-5 at 308 and 473 K was studied to investigate adsorption complexes formed in the zeolite pores prior to alkylation reactions. Methanol is adsorbed in the form of methoxonium ions at the Si-O{sup {minus}}-Al groups of the zeolite, and toluene is hydrogen bonded to these methoxonium ions. The thermal stability of the coadsorption complex, however, is low, as concluded from temperature-programmed desorption (TPD) measurements. Toluene desorbs prior to methanol, dimethyl ether in minor amounts is the only reaction product detected in the gas phase during TPD.

• OSTI ID: 6014072
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:9; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ADSORPTION
ALCOHOLS
ALKYLATED AROMATICS
ALKYLATION
AROMATICS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DESORPTION
EXPERIMENTAL DATA
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONS
MATERIALS
METHANOL
MINERALS
MOLECULAR STRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
PYROLYSIS
SILICATE MINERALS
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TEMPERATURE EFFECTS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
THERMOCHEMICAL PROCESSES
TOLUENE
ZEOLITES