Abstract: The catalytic pyrolysis performance of coker gas oil (CGO) and coupling with coker naphtha (CN) upgrading was investigated on a pilot plant riser unit under the process conditions of two-stage riser maximizing propylene (TMP) technology. Results showed that TMP technology displayed good adaptability to process CGO feed. The conversion of total two stage reactions reached 87.80%, the yield and selectivity of propylene was 18.12% and 64.87%, respectively; the yields of light oil and dry gas were 37.19% and 4.27%, respectively. However, the enhanced octane number of CN could only be obtained with the coupling of CGO catalytic pyrolysis and CN upgrading, not for single CN upgrading, with a 25% CN in the combined feedstock of CGO and CN, the RON of obtained gasoline could be more than 90.

Key words: catalytic pyrolysis, coker gas oil, coker naphtha, propylene, upgrading