Reaction Kinetics, Mechanisms and Catalysis

, Volume 122, Issue 2, pp 1245–1264 | Cite as

Kinetic modeling of the methanol to olefins process in the presence of hierarchical SAPO-34 catalyst: parameter estimation, effect of reaction conditions and lifetime prediction

  • Seyed Hesam Mousavi
  • Shohreh Fatemi
  • Marjan Razavian
Article
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Abstract

This paper reports a lumped kinetic model for the MTO process in the presence of hierarchical SAPO-34 catalyst. The kinetic model takes into account 14 components (including main and side products) and 13 reactions. The reaction kinetics was studied under the temperature range of 400–490 °C, methanol concentration of 30–60 wt%, and weight hourly space velocity (WHSV) between 1.5 and 3 gMeOH g cat −1 h−1. The kinetic parameters were calculated employing the genetic algorithm and defining an appropriate objective function. The proposed kinetic model is able to predict the product concentrations measured in the fixed bed reactor. Using the obtained kinetic model, the effect of temperature, WHSV, and methanol concentration on the product yield and methanol conversion have been investigated. Finally, a suitable function for the prediction of the catalyst lifetime in the process has been proposed. It was revealed that temperature possessed the greatest influence on the stability of the catalyst compared to the other operating parameters including WHSV and methanol concentration.

Keywords

MTO process Hierarchical SAPO-34 Kinetic modeling Catalyst lifetime 
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Supplementary material

11144_2017_1266_MOESM1_ESM.docx (118 kb)
(DOC 119 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.School of Chemical Engineering, College of EngineeringUniversity of TehranTehranIran

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