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Study examines production of near-zero sulfur FCC gasoline

04/14/2008
By ANGELA BRACKETT
This article examines the feasibility of producing near-zero sulfur FCC gasoline by FCC feed pretreatment and gasoline posttreatment. The transition to 10 from 50 ppm sulfur in the FCC gasoline using feed pretreatment drastically shortens the cycle length and significantly increases the cost for production of near-zero sulfur gasoline.A possible way to cut costs is to fractionate full-range FCC gasoline into two fractions: initial boiling point (IBP) to 140° C. and 140° C. to final boiling point (FBP) and hydrotreat the heavy fraction. Refiners, however, should perform the fractionation by undercutting the FCC gasoline in the main fractionator and then distill the heavy gasoline f...
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