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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

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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 −1cat 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.

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Authors and Affiliations

  1. School of Chemical Engineering, College of Engineering, University of Tehran, P. O. Box 11365 4563, Tehran, Iran

    Seyed Hesam Mousavi, Shohreh Fatemi & Marjan Razavian

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  1. Seyed Hesam Mousavi
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  2. Shohreh Fatemi
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  3. Marjan Razavian
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Correspondence to Shohreh Fatemi.

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Mousavi, S.H., Fatemi, S. & Razavian, M. 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. Reac Kinet Mech Cat 122, 1245–1264 (2017). https://doi.org/10.1007/s11144-017-1266-z

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  • DOI: https://doi.org/10.1007/s11144-017-1266-z

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