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Title: Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
National Chemical Lab., Poona, India
OSTI Identifier:
5939461
Resource Type:
Journal Article
Journal Name:
J. Catal.; (United States)
Additional Journal Information:
Journal Volume: 81:1
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALKANES; SYNTHESIS; AMMONIA; REMOVAL; AROMATICS; CUMENE; CATALYTIC CRACKING; ETHANOL; CHEMICAL REACTIONS; METHANOL; PYRIDINE; ADSORPTION; DESORPTION; XYLENES; ISOMERIZATION; ZEOLITES; CATALYTIC EFFECTS; SORPTIVE PROPERTIES; AIR; CATALYSTS; CHEMICAL REACTION KINETICS; EXPERIMENTAL DATA; GAS CHROMATOGRAPHY; HEATING RATE; HIGH TEMPERATURE; HYDROGEN; NITROGEN; PH VALUE; SAMPLE PREPARATION; SPECIFICITY; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; VERY HIGH TEMPERATURE; ALCOHOLS; AZINES; CHROMATOGRAPHY; CRACKING; DATA; DECOMPOSITION; ELEMENTS; FLUIDS; GASES; HETEROCYCLIC COMPOUNDS; HYDRIDES; HYDROCARBONS; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; INFORMATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; KINETICS; MATERIALS; MINERALS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NONMETALS; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PYRIDINES; PYROLYSIS; REACTION KINETICS; SEPARATION PROCESSES; SORPTION; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; 090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989); 400201 - Chemical & Physicochemical Properties; 400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)

Citation Formats

Nayak, V.S., and Choudhary, V.R. Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5. United States: N. p., 1983. Web. doi:10.1016/0021-9517(83)90144-6.
Nayak, V.S., & Choudhary, V.R. Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5. United States. doi:10.1016/0021-9517(83)90144-6.
Nayak, V.S., and Choudhary, V.R. Sun . "Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5". United States. doi:10.1016/0021-9517(83)90144-6.
@article{osti_5939461,
title = {Acid strength distribution and catalytic properties of H-ZSM-5: effect of deammoniation conditions of NH/sub 4/-ZSM-5},
author = {Nayak, V.S. and Choudhary, V.R.},
abstractNote = {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.},
doi = {10.1016/0021-9517(83)90144-6},
journal = {J. Catal.; (United States)},
number = ,
volume = 81:1,
place = {United States},
year = {1983},
month = {5}
}