摘要
将催化剂活性和扩散系数与进料时间进行关联 ,建立了考虑内扩散和结焦失活影响的烷基化反应动力学模型方程。利用反应实验数据和稳态时的反应动力学参数 ,进行参数估值 ,建立了烷基化催化剂失活动力学模型。研究结果表明 ,1级失活动力学模型具有较强的拟合实验数据能力 ,其统计检验的可信度高。该模型预测表明 ,烯烃转化率随着进料时间延长不断降低 ;催化剂粒径越大 ,烯烃转化率随进料时间延长先快速下降 ,然后缓慢下降 ;反应温度越高 。
A kinetic model equation of alkylation reaction, in which the factors of coking deactivation and internal diffusion were considered, was developed by correlating the catalytic activity and diffusion coefficient with feed-in time. The deactivation kinetic model of the catalyst for alkylation was established through parametric estimation by using the experimental data of reaction and reaction kinetic parameters obtained in the steady-state process. Statistics analysis results showed that the first order deactivation kinetic model exhibited a stronger capacity for simulating experimental data and a higher reliability. The model predictions indicated that olefin conversion decreased continuously with the increase of feed-in time, and the larger the granule sizes of catalysts employed, the more rapidly in the initial stages but the more slowly in the succedent stages the conversions decreased with the increase of feed-in time. It is also shown that the higher the reaction temperature, the higher the deactivation rate of catalysts occurred.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2001年第4期32-38,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
烷基化
固体酸催化剂
失活动力学
苯
长链烯烃
Alkylation
Benzene
Catalysts
Diffusion
Mathematical models
Olefins
Reaction kinetics
