carrier otherwise support (rus. носитель катализатора otherwise подложка (катализатора)) — an inert or semi-active material used for stabilisation on its surface of particles in an active catalytic phase.

Description

In heterogeneous catalysis, a carrier is used to prevent agglomeration or sintering of an active component, helping to maintain a large area of contact between an active substance (see active catalytic phase) and reagents. The quantity of carrier is usually greater than the quantity of active component applied to it. Critical carrier properties include a large surface area and porosity, thermal stability, chemical inertness and high mechanical strength. In some cases, a support may affect the properties of the active phase (“strong metal-support interaction” effect). Carriers may be represented by both natural (clay, holystone, diatom earth, asbestos, etc.) and synthetic materials (active carbons, silica gels, aluminium silicates, aluminium/magnesium/zirconium oxides, etc.).

Illustrations

Metallic platinum (shown with arrows) stabilized on a carrier - aluminum oxide. Author: Andrey
Metallic platinum (shown with arrows) stabilized on a carrier - aluminum oxide. Author: Andrey V. Smirnov, Lomonosov Moscow State University.

Authors

  • Smirnov Andrey V.
  • Tolkachev Nikolay N.

Sources

  1. Chorkendorff I., Niemantsverdriet J.W. Concept of Modern Catalysis and Kinetics. — Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA, 2003. — 452 pp.
  2. Krylov O. V. Heterogeneous catalysis. — Moscow.: IKC «Akademkniga», 2004. — 679 pp.

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