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Influence of CaO–ZnO supplementation as a secondary catalytic bed on the oxidative coupling of methane

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Abstract

A reactor with dual catalyst beds was proposed for the direct improvement of methane productivity to C2 hydrocarbons. In this bed configuration, methane was converted to ethane and ethylene over lithium supported magnesium oxide as a primary catalytic bed. The reaction tests were performed in the presence of CaO–ZnO catalysts as the secondary bed to convert the methane residue into ethane and ethylene. Both Li/MgO and CaO–ZnO catalysts were prepared by the wet impregnation method, tested in the dual fixed bed quartz reactor and characterized by BET, XRD, scanning electron microscopy and temperature programmed desorption of carbon dioxide. Catalytic activity tests were carried out at different temperatures ranging from 675 to 825 °C. The influence of CaO–ZnO supplementation as a secondary bed and its composition on total catalytic performance for oxidative coupling of methane was studied by changing Zn/Ca ratio. The effects of secondary bed dilution with quartz and mixed bed configuration on reaction productivity were also investigated. The experimental results showed that this supplementation could improve total yield toward C2 production.

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Acknowledgments

Appreciations are highly expressed for the support of Department of Gas Conversion, Iran Polymer and Petrochemical Institute.

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Authors and Affiliations

  1. Chemical Engineering Department, Babol University of Technology, P.O. Box 484, 4714871167, Babol, Iran

    Fereshteh Raouf & Majid Taghizadeh

  2. Department of Gas Conversion, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran

    Mohammad Yousefi

Authors
  1. Fereshteh Raouf
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  2. Majid Taghizadeh
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  3. Mohammad Yousefi
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Correspondence to Majid Taghizadeh.

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Raouf, F., Taghizadeh, M. & Yousefi, M. Influence of CaO–ZnO supplementation as a secondary catalytic bed on the oxidative coupling of methane. Reac Kinet Mech Cat 112, 227–240 (2014). https://doi.org/10.1007/s11144-014-0692-4

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  • DOI: https://doi.org/10.1007/s11144-014-0692-4

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