Hydrocarbon cracking selectivities with a dual zeolite fluid cracking catalyst containing REY and ZSM-5

Conference · Sat Aug 01 04:00:00 EDT 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5426904

Rajagopalan, K; Young, G W ^[1]

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1. W.R. Grace and Company, Columbia, MD (USA)

Synthetic Y faujasite zeolites have been used commercially as cracking catalysts for the past two decades, and more recently dual zeolite fluid cracking catalysts, containing faujasite and ZSM-5 were discovered to increase the octane number of the gasoline during catalytic cracking of gas oil. This concept, where ZSM-5 constitutes only a small fraction (about 1 wt %) of the cracking catalyst, has been tested commercially in Europe and in the United States. Cracking of paraffinic and olefinic hydrocarbons by ZSM-5 catalysts has been studied by several investigators over a range of temperatures (350 to 540{degree}C) and using nearly pure ZSM-5 as the catalyst. The mechanism of octane number enhancement with the dual zeolite catalyst was investigated by examining the effect on product selectivity of addition of 1 wt % ZSM-5 to a cracking catalyst composition during catalytic cracking of a commercial gas oil at 500{degree}C. Changes in composition of the product gasoline (paraffins, olefins, naphthenes and aromatics) caused by ZSM-5 were measured. Since commercial cracking catalysts undergo continuous high temperature regeneration in the presence of steam, the effect of hydrothermal treatment of ZSM-5 was also investigated.

• OSTI ID: 5426904
• Report Number(s): CONF-8708311--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 32:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALKENES
ANTIKNOCK RATINGS
AROMATICS
CATALYSIS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CRACKING
CYCLOALKANES
DATA
DEACTIVATION
DECOMPOSITION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GAS OILS
GASOLINE
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PRODUCTION
PYROLYSIS
REGENERATION
THERMOCHEMICAL PROCESSES
ZEOLITES