苯和长链烯烃烷基化反应动力学模拟

在固定床反应器中,采用3种不同粒度的固体酸催化剂,在300℃、8.0 MPa的超临界条件下进行了长链烯烃与苯的烷基化反应实验;建立了包括烷基化反应速率常数、烷基苯脱附速率常数和催化剂失活速率常数3个参数的烷基化反应动力学模型,采用实验数据对模型参数进行估值。对模型的F检验结果表明,建立的烷基化反应动力学模型可靠;不同重时空速和反应时间下的烷基化反应烯烃转化率实验值与计算值基本吻合,表明所建立的烷基化反应动力学模型计算精度高,可较好地模拟固体酸催化的多相烷基化反应过程。

Macro-Reaction Kinetics Simulation of Alkylation of Benzene with Long-Chain Olefins

Alkylation of benzene with long-chain olefins was carried out on three solid acid catalysts with different granule radiuses separately under supercritical conditions of temperature 300℃ and pressure 8.0 MPa in a fixed bed reactor.Based on the independent catalyst deactivation mechanism,a alkylation kinetics model with alkylation rate constant,catalyst deactivation rate constant and alkylbenzene desorption rate constant was established.Macro-kinetics simulation calculation for the alkylation was conducted by means of the data of olefin conversion,catalyst bulk density and supercritical fluid density.F-test showed the kinetics model was reliable.The experimental values of olefin conversion on the catalysts with different granule radiuses under different WHSV and time on stream were in accordance with the calculated values well.