AM-93-49 CONTROLLING BENZENE YIELD FROM THE FCCU

Description:

Benzene is present in FCC Gasoline from commercial FCC units typically at levels of 0.5 to 1.3%~. The * Clean Air Act Amendment Complex Model is expected to define a maximum limit of 0.8 to 1.0%~ in the gasoline pool for ozone non-attainment areas. To meet these low gasoline-pool benzene levels, benzene in reformate will have to be strictly controlled. FCCgasolineisalsoasourceofbenzene which requires control. Based on commercial, pilot plantandMST (micro-simulation test) data, benzene levels inFCCgasoline areveryfeedstockdependent. Benzene levels are also dependent on FCC catalyst tYPeI FCC operating temperature and contact time.