关键词: 催化裂化, 汽油, 苯含量, 生成机理, 影响因素, 降苯措施

Abstract: As environmental regulations become increasingly stringent, particularly with the implementation of the National Ⅵ gasoline standard, fluid catalytic cracking (FCC) gasoline—serving as the primary blending component for automotive gasoline in China—has made the control of its benzene content a critical issue that refining enterprises must urgently address. This paper provides an in-depth analysis of the formation mechanism of benzene during the FCC reaction process, identifying alkylaromatic transfer reactions and aromatics formation reactions as its two major sources. On this basis, it systematically examines the influence of factors such as FCC feedstock properties, reaction process types, operating parameters, and catalyst characteristics on the benzene content in gasoline. From an industrial application perspective, this review summarizes various benzene reduction measures—including feedstock optimization, operational adjustments, catalyst selection, process technological upgrades, and blending optimization,along with their application effects, thereby providing theoretical foundations and technical references for refining enterprises to optimize their processes.

Key words: catalytic cracking, gasoline, benzene content, formation mechanism, influencing factors, benzene reduction measures