Activity, selectivity, and deactivation of high-sodium HY zeolite
Journal Article
·
· Journal of Catalysis; (United States)
- West Virginia Univ., Morgantown (United States)
The effect of deactivation on the activity and selectivity of (very high) Na[sup +] content HY zeolite catalysts was studied in a pulse microreactor equipped with a thermogravimetric analysis unit (TGA). Cumene was used as the reactant. The Na[sup +] level studied was from 3.2 to 11.8% of Na[sub 2]O. As the Na[sup +] content decreases, the acidity of the zeolite increases and deactivation decreases. The effect of coke level on selectivity to benzene, toluene, ethylbenzene, dimethylbenzene, ethyltoluene, cymene, and diisopropylbenzene depends on the Na[sup +] content. For example, the selectivity with coke level is obtained for most other products. At intermediate Na[sup +] levels (around 7% Na[sub 2]O), ethylbenzene shows a maximum in selectivity while cymene passes through a minimum. The maximum coke deposition and the coke level for the maximum incremental coke deposition are two important parameters that distinguish conversion and selectivity patterns.
- OSTI ID:
- 7191292
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 134:2; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKYLATED AROMATICS
AROMATICS
BENZENE
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COKE
CRACKING
CUMENE
CYMENE
DEACTIVATION
DECOMPOSITION
DEPOSITION
ELEMENTS
GRAVIMETRIC ANALYSIS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
SILICATE MINERALS
SODIUM
SODIUM COMPOUNDS
SODIUM OXIDES
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
TOLUENE
ZEOLITES
020400* -- Petroleum-- Processing
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKYLATED AROMATICS
AROMATICS
BENZENE
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COKE
CRACKING
CUMENE
CYMENE
DEACTIVATION
DECOMPOSITION
DEPOSITION
ELEMENTS
GRAVIMETRIC ANALYSIS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
SILICATE MINERALS
SODIUM
SODIUM COMPOUNDS
SODIUM OXIDES
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
TOLUENE
ZEOLITES