CoMo/Al2O3催化剂柴油加氢脱芳烃集总反应动力学模型

Lumped Kinetic Model for Diesel Hydrodearomatization on CoMo/Al2O3 Catalyst

为满足生产国六标准车用柴油的需要,采用等温高通量反应器,对加氢精制催化剂CoMo/Al2O3上的柴油加氢脱芳烃(HDA)动力学进行了研究。考察了反应温度、氢分压、氢/油体积比、空速等因素对柴油加氢脱芳烃反应的影响。根据芳烃加氢反应机理将柴油中的芳烃化合物按所含芳环个数分成了三集总。在此基础上,建立了考虑竞争吸附影响的集总反应动力学模型,并采用鲍威尔优化算法确定了模型参数。结果表明,所得动力学模型与实验结果吻合良好。进一步的验证结果表明,所建动力学模型能够很好地预测柴油加氢脱芳烃过程,所得模型可为柴油加氢脱芳烃反应的操作优化提供技术支撑。

Hydrodearomatization (HDA) kinetics in diesel products with CoMo/Al 2O 3 catalyst were investigated in an isothermal high-throughput reactor. Effects of reaction temperature, hydrogen partial pressure, hydrogen/oil volume ratio, and liquid hourly space velocity (LHSV) were investigated. Base on the hydrodearomatization reaction mechanism, aromatics in diesel were categorized into 3 lumps according to their numbers of aromatic ring. A lumped kinetic model considering the influence of competitive adsorption was proposed, and its kinetic parameters were optimized through Powell method. Experimental and modelling results suggest both of them are consistent with each other. Further validation results show that the kinetic model can predict diesel hydrodearomatization process very well. This kinetic model can be used to provide technical support for diesel hydrodearomatization process optimization.