Abstract: In order to realize the resourceful utilization of styrene tar in catalytic cracking unit, the properties and hydrocarbon composition characteristics of styrene tar were analyzed, the product distribution of styrene tar through catalytic cracking and the influence of feeding methods and blending ratios on the product distribution were investigated. The results show that styrene tar has high density, high carbon residue and high aromatics content. The molecular structure of aromatics in styrene tar is dominated by monocyclic aromatics and non-dense polycyclic aromatics. Main products of different styrene tar are gasoline and diesel, with low gas yield and high coke yield, and the aromatics content in gasoline is more than 80%. Based on the influence of product distribution and product quality requirements, styrene tar is suitable for processing by mixing it with catalytic feed and with a blending ratio of less than 5%.

Key words: styrene tar, catalytic cracking, gasoline