Abstract: In order to maximize the value of heavy olefins, by-products from methanol-to-olefins unit, their catalytic cracking performance and product properties were investigated using ACE and FFB units. The impact of heavy olefins on processing and product quality when co-processed with heavy oil was also analyzed. The results indicated that the influence on the processing and product quality was negligible because of the low heteroatom content in heavy olefins. Heavy olefins can be efficiently converted into light olefins and gasoline by catalytic cracking reaction. When heavy olefins were co-processed with heavy oil, in both reaction modes, as the proportion of heavy olefins in the feed increased, gasoline yield rised and the octane number improved, the diene content in gasoline remained low, indicating minimal impact on gasoline properties.

Key words: heavy olefins, catalytic cracking, light olefins, high-octane gasolin