Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5
Acid strength distribution, catalytic activity in cumene cracking and o-xylene isomerization reactions, and the distribution of hydrocarbons formed in methanol and ethanol conversion reactions on H-ZSM-5 zeolites obtained from NH/sub 4/-ZSM-5 under different deammoniation conditions (i.e., by varying temperature, period, atmosphere and heating rate in the deammoniation) have been studied. The catalytic properties of the zeolites are correlated to their acidity. The acid strength distribution, the cracking and isomerization activities, and the distribution of hydrocarbons in the alcohol conversion reactions on the zeolites are affected by the changes in the temperature, period, and atmosphere employed in the deammoniation, the effect produced by the higher deammoniation temperatures (> 873 K) being very drastic. The heating rate employed for attaining the deammoniation temperature has no significant effect on either the acidity distribution or the catalytic properties of the zeolite.
- Research Organization:
- National Chemical Lab., Poona, India
- OSTI ID:
- 5939461
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 81:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
AIR
ALCOHOLS
ALKANES
AMMONIA
AROMATICS
AZINES
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
CRACKING
CUMENE
DATA
DECOMPOSITION
DESORPTION
ELEMENTS
ETHANOL
EXPERIMENTAL DATA
FLUIDS
GAS CHROMATOGRAPHY
GASES
HEATING RATE
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
KINETICS
MATERIALS
METHANOL
MINERALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
PYRIDINE
PYRIDINES
PYROLYSIS
REACTION KINETICS
REMOVAL
SAMPLE PREPARATION
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECIFICITY
SURFACE PROPERTIES
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
VERY HIGH TEMPERATURE
XYLENES
ZEOLITES