Characterization of Cinchonidine Doped Montmorillonite Supported Noble Metal Catalysts by Thermoanalytical Methods

  • K. Balázsik
  • B. Török
  • M. Bartók
  • I. Kiricsi
  • I. Dékány
Article

Abstract

The characterization of new cinchonidine doped K-10 montmorillonite supported noble metal catalysts is described. Our aim was the mapping of thermal stability of these new catalytic materials by thermogravimetry (TG), differential thermogravimetry (DTG) and differential thermoanalysis (DTA) methods accompanied by X-ray diffraction (XRD) measurements.

The catalysts were prepared by various methods including conventional, microwave and ultrasonic treatments. They were characterized first by X-ray diffraction to verify the stability of montmorillonite crystal structure during preparation. Then, TG and DTG methods were applied to determine their stability under the experimental conditions usually applied. The main changes observed were the loss of water and the decomposition of the organic modifiers in the higher temperature region. The catalyst showed the best performance were prepared and characterized using microwaves and ultrasonic irradiation in order to get more insight to the effect of preparation methods on their stability. As a consequence, the catalysts were found to be stable and regenerable under 450-500 K, however, higher temperatures resulted in the complete destruction of the catalysts.

DTA DTG immobilized cinchonidine Pt/K-10 montmorillonite TG thermal stability 

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • K. Balázsik
    • 1
  • B. Török
    • 1
  • M. Bartók
    • 1
  • I. Kiricsi
    • 2
  • I. Dékány
    • 2
  1. 1.Organic Catalysis Research Group of the Hungarian Academy of SciencesJózsef Attila UniversitySzeged
  2. 2.Colloid Chemistry DepartmentJózsef Attila UniversitySzegedHungary

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