Effects of coke formation on the acidity of ZSM-5

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(86)90373-8· OSTI ID:5330156

McLellan, G D; Howe, R F; Parker, L M; Bibby, D M

The catalytic activity of ZSM-5 for the conversion of methanol to gasoline has been attributed to the combination of two properties of the zeolite: its intrinsic acidity and its unique pore structure. The slow deactivation of ZSM-5 during methanol conversion is attributed to the buildup of nonvolatile hydrocarbon residues termed coke which block access of reactant molecules to the active sites. The authors have undertaken a detailed investigation of the acidity of ZSM-5 as a function of the amount of coke deposited during methanol conversion, with the objective of understanding the role played by acid sites in the formation of coke. The acidity was monitored by measuring the adsorption of two different bases, NH/sub 3/ and pyridine, using the techniques of FTIR spectroscopy and temperature-programmed desorption (TPD). 20 references.

• Research Organization: Univ. of Auckland, Private Bag (New Zealand)
• OSTI ID: 5330156
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 99:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ADSORPTION
ALCOHOLS
AMMONIA
AZINES
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHEMICAL REACTIONS
COKE
CORRELATIONS
CRYSTAL STRUCTURE
DEACTIVATION
DEPOSITION
DESORPTION
FOURIER TRANSFORMATION
FUELS
GASOLINE
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
INTEGRAL TRANSFORMATIONS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
METHANOL
MICROSTRUCTURE
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM PRODUCTS
PH VALUE
POROSITY
PYRIDINE
PYRIDINES
REFORMER PROCESSES
SORPTION
SPECTRA
SYNTHESIS
TRANSFORMATIONS
ZEOLITES