Optimum blending gives best pool octane

Journal Article · Mon Jan 20 04:00:00 EST 1986 · Oil Gas J.; (United States)

OSTI ID:6237266

Morris, W E

Optimum blending of gasoline components can increase the pool octane by 0.1 to 0.5 numbers. To achieve the optimum octane blending scheme, accurate octane blending values must be obtained. These blending values can be developed from an interaction blending study or from generalized predicted interaction coefficients. Many refiners are blending in a non-optimum fashion so that there are some cheap octanes available for the taking by simply changing to an optimum blending scheme. A study of 1984 gasoline compositions indicated that many refiners were blending in a non-optimum fashion and that ''pool octane'' could have been increased almost 0.5 octane. The term pool octane usually refers to the weighted average octane of all of the gasoline components. It can be calculated by multiplying the octane of each component by its fraction of the pool and adding the results. If the components are blended into two or more grades, a second pool octane could be calculated by multiplying the octane of each grade, before any lead antiknock addition, by its fraction of the total pool. The second pool octane will differ from the first because the components do not blend linearly. The octane of a 50:50 blend of two components may be higher or lower than the average of the octanes of the two components.

• Research Organization: William E. Morris, Inc., Wilmington, DE
• OSTI ID: 6237266
• Journal Information: Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 84:3; ISSN OIGJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
023000* -- Petroleum-- Properties & Composition
ALKANES
ANTIKNOCK RATINGS
CALCULATION METHODS
CHEMICAL COMPOSITION
FUELS
GASOLINE
HYDROCARBONS
INDUSTRIAL PLANTS
LIQUID FUELS
MIXING
OCTANE
OPTIMIZATION
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PETROLEUM REFINERIES
QUANTITY RATIO