Modification of FCC catalysts by addition of ZSM-5

Conference · Wed Aug 01 04:00:00 EDT 1990 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States)

OSTI ID:6969243

Rawlence, D J ^[1]; Dwyer, J ^[2]

---

1. Crosfield Catalysts, Cheshire (United Kingdom)
2. UMIST, Manchester (United Kingdom)

ZSM-5 is now used frequently in FCC operations to modify the selectivity of the active zeolite Y base. A small addition, generally no more than 2.5% crystal in a separate catalyst substrate, has a pronounced effect on both LPG and gasoline yields and in addition produces an enhancement of gasoline octane rating. This paper studies the role of ZSM-5 in more detail by examining hydrocarbon type distributions in the C{sub 1}-C{sub 10} region of cracked product. A first series of experiments examines the effect of ZSM-5 deactivation on activity and selectivity of a steam deactivated commercial FCC catalyst in order to simulate the effect of fresh ZSM-5 addition to an equilibrium catalyst. At zero, or minimal deactivation, ZSM-5 has a positive influence on overall activity but there is a preponderance of C{sub 2}-C{sub 4} alkanes. Further deactivation lessens activity and produces relatively more LPG olefinicity and reaction mechanisms are proposed to account for the product distribution.

• OSTI ID: 6969243
• Report Number(s): CONF-900802--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States) Journal Volume: 35:4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRACKING
DEACTIVATION
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASOLINE
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
LIQUEFIED GASES
LIQUEFIED PETROLEUM GASES
LIQUID FUELS
LIQUIDS
MATERIALS
MINERALS
MOISTURE
MOLECULAR WEIGHT
NATURAL GAS LIQUIDS
PETROLEUM
PETROLEUM PRODUCTS
PYROLYSIS
REACTION KINETICS
SILICATE MINERALS
SYNTHESIS
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES