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在确定线性烷基苯反应生成动力学方程基础上 ,在消除外扩散影响前提下 ,用苯烯摩尔比为 1 0∶1的反应原料 ,在中孔分子筛负载杂多酸催化剂上进行苯与长链烯烃烷基化反应 ,采用气相色谱法分析反应组成 ,获得了不同反应温度、质量空速、催化剂粒度的烷基化反应试验数据。对模型进行参数估值 ,确定了线性烷基苯生成反应速率常数、扩散系数 ,以及反应活化能和扩散活化能参数 ,建立了考虑内扩散影响的线性烷基苯生成反应动力学模型 ,并开展模型评价、模型预测和反应规律研究。研究结果表明 ,线性烷基苯收率试验值和计算值的相关指数为 0 .9892 ,说明该模型具有较强的拟合试验数据能力 ,可信度较高。模型预测结果表明 ,线性烷基苯收率随着反应温度提高和原料与催化剂接触时间延长而不断提高 ,随催化剂粒径增大而降低。
On the basis of determining the kinetic equation of linear alkylbenzene reaction and eliminating the influence of external diffusion, the reaction of benzene with long Alkylation of alkene, the composition of the reaction was analyzed by gas chromatography, and the alkylation reaction data of different reaction temperature, mass space velocity and catalyst particle size were obtained. The parameters of the model were estimated to determine the linear alkylbenzene formation reaction rate constant, the diffusion coefficient, the reaction activation energy and the diffusion activation energy parameter, and the kinetic model of the linear alkylbenzene formation reaction was established and considered Model evaluation, model prediction and reaction law. The results show that the correlation index between the experimental value and the calculated value of linear alkylbenzene yield is 0.9892, which shows that the model has strong ability of fitting test data with high credibility. The model predictions showed that the yield of linear alkylbenzenes increased with the increase of reaction temperature and the contact time between feedstock and catalyst, and decreased with the increase of catalyst particle size.