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Petroleum Chemistry, Vol.54, No.2, 157-164, 2014
Process for producing high octane gasoline having lower benzene content and distillation end point with its environmental effect of engine exhaust emissions
In this research, a process is discussed for upgrading reformate and power former in Iraq's Al-Doura refinery, by reducing the amount of benzene in the gasoline product with simultaneous reduction in the gasoline's ASTM distillation end point. The process consists of fractionation of the reformate and power former to recover that fraction (90-180A degrees C) of hydrocarbons. This was directly used as gasoline without further conversion. The heavy bottom fraction (180A degrees C-EBP) consisting of the aromatic and non-aromatic hydrocarbons was recovered and used as antiknock additives to gasoline. The other fraction with (IBP-90A degrees C) was used as feedstock to producing benzene by solvent extraction. The reformate and power former fractions (90-180A degrees C) are blended with light straight run naphtha at ratio (75: 25) to producing gasoline as well as Al Doura gasoline. It was found that the amount of benzene was reduced from 1.41 wt % in the original pool to 1.37 and 1.31 in the alternative products. Engine emissions were also reduced when using the alternative products compared with original pool product.