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Electron microscopic characterization of Cr/silica catalyst for ethylene polymerization

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Abstract

Ethylene polymerization was carried out over both porous and non-porous 5 wt% Cr/silica catalysts in a slurry reactor. The polymerization was stopped at selected times to obtain samples for SEM and TEM characterization. Despite the different physical characteristics of the two silica-supported catalysts and their different behavior in the early stages of reaction, high resolution SEM micrographs (taken after runs of longer duration) revealed similar, fibrous and very porous polymer layers on both. This accessibility of the ethylene enables transport of monomer to the active sites at the very high reaction rates.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Alberta, T6G 2G6, Edmonton, Alberta, Canada

    J. A. Szymura, P. A. Zielinski & I. G. Dalla Lana

  2. Department of Technology and Chemical Engineering, Technical and Agricultural University, 85-326, Bydgoszcz, Poland

    J. A. Szymura

  3. Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Poland

    P. A. Zielinski

Authors
  1. J. A. Szymura
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  2. P. A. Zielinski
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  3. I. G. Dalla Lana
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Szymura, J.A., Zielinski, P.A. & Lana, I.G.D. Electron microscopic characterization of Cr/silica catalyst for ethylene polymerization. Catal Lett 15, 145–153 (1992). https://doi.org/10.1007/BF00770907

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