Gas-phase isomerization of meta-xylene over USY zeolite in a Riser Simulator: A simplified kinetic model

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机构：

[1] Iliyas, A.

[2] Al-Khattaf, S.

来源：

Al-Khattaf, S. (skhattaf@kfupm.edu.sa) | 1600年 / Elsevier卷 / 107期

关键词：

Catalysts - Fluidized beds - Isomerization - Mathematical models - Reaction kinetics - Regression analysis - Zeolites;

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摘要：

The gas-phase isomerization of meta-xylene has been carried out over USY zeolite catalyst using a fluidized bed reactor under relevant reaction conditions for FCC (temperature, contact time, reactant partial pressure, catalyst/oil ratio). Experimental results clearly indicate the presence of bimolecular isomerization pathway, in addition to the monomolecular isomerization reaction. The disproportionation/isomerization (D/I) ratio was found to increase steadily with both m-xylene conversion and reaction temperature, whereas p-xylene/o-xylene (P/O) ratio was only mildly affected with both reaction parameters. A simplified kinetic model based on reactant-converted (RC) deactivation model was developed for the reaction and compared with the obtained experimental data. The apparent kinetic parameters were estimated using nonlinear regression analysis. © 2004 Elsevier B.V. All rights reserved.

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