ZSM-5 in catalytic cracking: Riser pilot plant gasoline composition analyses

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

OSTI ID:6969255

Pappal, D A ^[1]; Schipper, P H ^[2]

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1. Mobil Research and Development Corp., Paulsboro, NJ (United States)
2. Mobil Research and Development Corp., Princeton, NJ (United States)

ZSM-5, Mobil's proprietary shape-selective zeolite, has been used commercially in synthetic fuels (methanol-to-gasoline), petrochemicals (xylene isomerization, toluene disproportionation, benzene alkylation) and in petroleum refining (lube and distillate dewaxing). Using these examples, Chen and Garwood have demonstrated the shape selective behavior of this catalyst. In the dewaxing process, for example, ZSM-5 preferentially cracks the straight chain paraffins; substantially improves the pour and cloud points while retaining high distillate yields. Since 1983, ZSM-5 has been used in catalytic cracking to increase both the research and motor octanes and the production of light olefins. These olefins can then increase the yields of alkylate, MTBE and TAME. ZSM-5 accomplishes this by upgrading low octane components in the gasoline boiling range (C{sub 7}-C{sub 10} hydrocarbons) into light olefins (C{sub 3}, C{sub 4}, C{sub 5}). It also increases the concentration of C{sub 4} and C{sub 5} branched olefins. Since its introduction in 1983, ZSM-5 has been used in over 10% of the free world's cracking capacity. The yield shifts from this study indicate minimal shifts in total paraffin yield but a distinct increase in iso/normal ratio for both catalysts when ZSM-5 is added. In general the higher molecular weight olefins decrease with an increase in the lower molecular weight olefins. The iso/linear olefin ratio increases with ZSM-5 added for both catalysts in the C{sub 5} and C{sub 6} carbon number range. The increase in iso/normal aliphatics translates into a very selective increase in motor octane for both catalysts.

• OSTI ID: 6969255
• Report Number(s): CONF-900802-; CODEN: ACPCA
• Journal Information: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States), Vol. 35:4; Conference: 200. American Chemical Society (ACS) national meeting, Washington, DC (United States), 26-31 Aug 1990; ISSN 0569-3799
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
FAUJASITE
CATALYTIC EFFECTS
PETROLEUM
CATALYTIC CRACKING
ALKANES
ALKENES
BENZENE
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
FUEL ADDITIVES
GASOLINE
KNOCK CONTROL
PETROCHEMICALS
PETROLEUM REFINERIES
PILOT PLANTS
REFINING
SYNTHETIC FUELS
TOLUENE
ADDITIVES
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
HYDROCARBONS
INDUSTRIAL PLANTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROCESSING
PYROLYSIS
SILICATE MINERALS
SYNTHESIS
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES
020400* - Petroleum- Processing