Linear models help refiners develop RFG recipes

Bruce T. Naman Bonner & Moore Associates Inc. Houston Linear methods to predict TOX (toxic emissions), NOx (nitrogen oxides), and VOCs (volatile organic compounds) of a blend can help refiners calculate the likelihood that their blend recipes will meet requirements of Phases I and II complex models for reformulated gasoline (RFG). Multiple regression techniques to predict TOX, NOx, and VOCs are based on the following variables: Oxygenates content, wt % oxygen Reid vapor pressure (Rvp), psi Sulfur content, ppm Aromatics content, vol % Olefins content, vol % E200, % fuel evaporated at 200° F...

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