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Effect of process variables on product yield distribution in thermal catalytic cracking of naphtha to light olefins over Fe/HZSM-5

  • Catalysis, Reaction Engineering
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Abstract

The effect of temperature, WHSV and Fe loading over HZSM-5 catalyst in thermal-catalytic cracking (TCC) of naphtha for the production of light olefins has been studied. The response surface defined by three most significant parameters is obtained from Box-Behnken design method and the optimal parameter set is found. The results show that ethylene increases with temperature, while propylene shows an optimum at 650 °C. Moderate WHSV is favorable for maximum production of light olefins. Addition of Fe to HZSM-5 has a favorable effect on the production of light olefins up to 6% of loading. Excess amount of loading decreases the conversion of naphtha, which leads to a drop in light olefin yields. The yield of light olefins (ethylene and propylene) at 670 °C, 44 hr−1 and 6 wt% Fe has been increased to 5.43 wt% compared to the unmodified HZSM-5 and reaches to 42.47 wt%.

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Authors and Affiliations

  1. Faculty of Chemical Engineering, Tarbiat Modares University, P. O. Box 14115-114, Tehran, Iran

    Mina Alyani, Jafar Towfighi & Seyed Mojtaba Sadrameli

Authors
  1. Mina Alyani
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  2. Jafar Towfighi
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  3. Seyed Mojtaba Sadrameli
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Correspondence to Jafar Towfighi.

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Alyani, M., Towfighi, J. & Sadrameli, S.M. Effect of process variables on product yield distribution in thermal catalytic cracking of naphtha to light olefins over Fe/HZSM-5. Korean J. Chem. Eng. 28, 1351–1358 (2011). https://doi.org/10.1007/s11814-010-0518-7

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  • DOI: https://doi.org/10.1007/s11814-010-0518-7

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