Estimate octane numbers using an enhanced method

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Hydrocarbon Processing

OSTI ID:455515

Twu, C H; Coon, J E ^[1]

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1. Simulation Sciences Inc., Brea, CA (United States)

An improved model, based on the Twu-Coon method, is not only internally consistent, but also retains the same level of accuracy as the previous model in predicting octanes of gasoline blends. The enhanced model applies the same binary interaction parameters to components in each gasoline cut and their blends. Thus, the enhanced model can blend gasoline cuts in any order, in any combination or from any splitting of gasoline cuts and still yield the identical value of octane number for blending the same number of gasoline cuts. Setting binary interaction parameters to zero for identical gasoline cuts during the blending process is not required. The new model changes the old model`s methodology so that the same binary interaction parameters can be applied between components inside a gasoline cut as are applied to the same components between gasoline cuts. The enhanced model is more consistent in methodology than the original model, but it has equal accuracy for predicting octane numbers of gasoline blends, and it has the same number of binary interaction parameters. The paper discusses background, enhancement of the Twu-Coon interaction model, and three examples: blend of 2 identical gasoline cuts, blend of 3 gasoline cuts, and blend of the same 3 gasoline cuts in a different order.

• OSTI ID: 455515
• Journal Information: Hydrocarbon Processing, Journal Name: Hydrocarbon Processing Journal Issue: 3 Vol. 76; ISSN HYPRAX; ISSN 0018-8190
• Country of Publication: United States
• Language: English

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