中文摘要：

本文应用蒙特卡罗方法建立了汽油机三元催化器（TWC）芳香烃演化模型，并使用实际发动机的实验结果对该模型进行了验证，结果表明该模型与实际基本相符。同时根据计算证明了，烷基苯催化重整加氢脱烷基生成苯，是三元催化器中苯生成的一个途径。而且发现了三元催化器中苯生成的另一个途径：烷基苯部分氧化生成苯，而且在某些工况该反应起主要作用。

英文摘要：

In this paper, the model of aromatic hydrocarbons formation in TWC of gasoline engine was established by using the method of Monte Carlo. And it was confirmed by compared with the engine experiments, which also proved that dealkylation reactions of alkylbenzene is a way to form benzene in TWC and partial oxidized of alkylbenzene is another way to form benzene in TWC, which is the main way of benzene formation in TWC in some engine operations.