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根据某石化企业芳烃生产数据,运用Petro-SIM软件建立了包括芳烃歧化和烷基转移、芳烃异构化反应模型的流程模型,经校正后,对模型计算值与实际测量值进行对比,验证了模型的准确性。利用软件中的Databook功能,对建立的模型进行了单装置反应条件和原料组成对产品产率影响的研究,结果表明,甲苯歧化及烷基转移反应中,产物的选择性主要受原料中T/C9A的比值的影响;芳烃异构化单元中,提高反应温度,有利于二甲苯达到热力学平衡,增加反应压力,乙苯转化率增加,原料中乙苯和C8环烷烃的含量对乙苯转化率和对二甲苯收率影响较为显著。
According to aromatics production data of a petrochemical enterprise, Petro-SIM software was used to establish a process model including aromatics disproportionation and transalkylation, aromatics isomerization reaction models. After the calibration, the calculated and measured values of the model were compared and verified The accuracy of the model. The Databook function in the software was used to study the influence of the reaction conditions and the composition of the raw materials on the yield of the product. The results show that the selectivity of the products in toluene disproportionation and transalkylation is mainly affected by the T / C9A ratio; aromatic isomerization unit, to improve the reaction temperature is conducive to xylene to achieve thermodynamic equilibrium, increase the reaction pressure, ethylbenzene conversion rate increases, the feedstock ethylbenzene and C8 naphthene content of ethylbenzene conversion And p-xylene yield more significant impact.