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Reaction Kinetics and Catalysis Letters

, Volume 54, Issue 1, pp 87–97 | Cite as

Catalytic properties of pillared montmorillonites

  • Jozef Krajčovič
  • Pavel Hudec
  • František Grejták
Article

Abstract

Hydroxyaluminium and hydroxychromium pillared montmorillonites were prepared by intercalation and subsequent calcination of Ca-montmorillonite separated from Jelšový Potok bentonite (Central Slovakia). Ca-montmorillonite and pillared clays were studied by thermal and X-ray diffraction methods. Nitrogen adsorption-absorption data were used to determine pore size distribution, specific surface area, volume of micropores and surface of mesopores. Isomerization of o-xylene to p- and m-xylene, and o-xylene disproportionation were used to test the catalytic activity of investigated materials. The measurements showed increasing catalytic activity in the order Ca-montmorillonite<chromium pillared montmorillonite<aluminium pillared montmorillonite. The results confirmed that increasing surface area had a positive effect on the conversion and disproportionation of o-xylene.

Keywords

Clay Catalytic Activity Calcination Montmorillonite Pore Size Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • Jozef Krajčovič
    • 1
  • Pavel Hudec
    • 2
  • František Grejták
  1. 1.Institute of Inorganic ChemistrySlovak Academy of SciencesBratislavaSlovak Republic
  2. 2.Department of Petroleum, Faculty of Chemical TechnologySlovak Technical UniversityBratislavaSlovak Republic

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