Selectivity and yield of components of a composite cracking catalyst: Effect of interactions between composite components

Journal Article · Sat May 01 04:00:00 EDT 1993 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1006/jcat.1993.1126· OSTI ID:5989943

Dadyburjor, D B; Liu, Zhenyu ^[1]

---

1. West Virginia Univ., Morgantown (United States)

Coking, activity, and product distribution of a composite catalyst and its components, an REY zeolite and a silica-alumina matrix, are studied in the cracking of n-hexadecane at 500[degrees]C in a pulse microreactor equipped with a thermogravimetric analysis unit (TGA), an integral sample collector, and a GC. The matrix component alone does not show significant activity beyond thermal cracking. The zeolite component has high activity and high coking rate. The composite catalyst shows much higher conversion, much higher yield to C[sub 5]-C[sub 10], and much lower coking rate than the values predicted from its components. The activity and the product distribution are affected by coke deposition, and this effect depends on coke level of the catalysts. Product yields for the three catalysts as functions of coke levels allow us to determine yield enhancement factors and selectivity enhancement factors (referring to the zeolite coke level) for four product groups. Examination of the selectivity enhancement factors indicates how the heaviest products (C[sub 17+]) from the matrix component of the composite catalyst convert to kerosene, gasoline, and lightest (C[sub 4-]) product groups over the zeolite component of the composite catalyst, and how these interconversions change with the coke level on the zeolite. 12 refs., 16 figs., 1 tab.

• OSTI ID: 5989943
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 141:1; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBONIZATION
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COKE
COKING
COMPOSITE MATERIALS
CONVERSION
CRACKING
DECOMPOSITION
DEPOSITION
DISTILLATES
DISTRIBUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
GAS OILS
GASOLINE
GRAVIMETRIC ANALYSIS
HETEROGENEOUS CATALYSIS
HEXADECANE
HYDROCARBONS
INORGANIC ION EXCHANGERS
INTERACTIONS
ION EXCHANGE MATERIALS
KEROSENE
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES