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Compressive Properties of Micro-spherical SiO2 Particles

  • Niko HellsténEmail author
  • Antti J. Karttunen
  • Charlotta Engblom
  • Alexander Reznichenko
  • Erika Rantala
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Micron-sized, spherical SiO2 particles are important in various industrial applications, such as in heterogeneous catalyst preparation. In particular, many of industrially relevant olefin polymerization catalysts are currently prepared using micro-spherical silica as catalyst support. In large-scale catalytic polyolefin production, the quality of the final product, as well as the process efficiency is crucially dependent on overall consistency, quality, and physico-chemical properties of the catalyst. As the catalyst particle experiences various stresses during the polymer particle growth, mechanical properties of catalyst play a key role in its performance in the polymerization process. However, there is currently a lack of experimental mechanical property measurements of micron-sized, spherical SiO2 particles relevant for the polyolefin catalyst production. In this work, compressive properties of commercial porous micro-spherical silicas were studied using a quasi-static micro-compression method. The method includes compressing single, micron-sized particles in controlled loading conditions. From the measurements, the compressive elastic–plastic properties of these particles can be determined.

Keywords

Micro-compression Micro-spherical silica Catalysts 

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Niko Hellstén
    • 1
    Email author
  • Antti J. Karttunen
    • 1
  • Charlotta Engblom
    • 2
  • Alexander Reznichenko
    • 2
  • Erika Rantala
    • 2
  1. 1.School of Chemical EngineeringAalto UniversityAaltoFinland
  2. 2.Borealis Polymers OyPorvooFinland

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