Octane catalysts raise heat of cracking, reduce coke make

Journal Article · Mon May 25 00:00:00 EDT 1987 · Oil Gas J.; (United States)

OSTI ID:6203892

Leuenberger, E L; Wilbert, L J

A fluid catalytic cracking (FCC) catalyst that increases cracked gasoline octane by 2 research octane numbers (RON) can be expected to increase the endothermic heat of cracking by 50 BTU/lb of feed, and to reduce the catalytic coke making tendency by 10% relative. Commercial and lab data indicate the heat of cracking increase is due to the ''recracking'' of gasoline to C/sub 4/ and lighter gas as well as the minimization of hydrogen transfer reactions. The coke reduction is also attributed to lower hydrogen transfer. These heat balance effects of octane catalysts can reduce generator temperature by 30/sup 0/F. in a commercial FCC unit. Catalytic cracking reactions are endothermic, i.e., they create products with higher heat contents than the reactants, and they absorb heat from the environment. In the cracking of parafffins by the beta scission mechanism, a high molecular weight paraffin is cracked to form a lower molecular weight olefin and a paraffin.

• Research Organization: Engelhard Corp., Edison, NJ
• OSTI ID: 6203892
• Journal Information: Oil Gas J.; (United States), Vol. 85:21
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
GASOLINE
CATALYTIC CRACKING
OCTANE
CATALYTIC EFFECTS
ANTIKNOCK RATINGS
CATALYSTS
CHEMICAL REACTION YIELD
COKE
HYDROGEN TRANSFER
REACTION HEAT
REGENERATORS
STABILITY
TEMPERATURE EFFECTS
ALKANES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENTHALPY
FUELS
HYDROCARBONS
LIQUID FUELS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
YIELDS
020400* - Petroleum- Processing