E3S Web of Conferences (Jan 2016)

The use of CeO2-Co3O4 oxides as a catalyst for the reduction of N2O emission

  • Rajska Maria,
  • Wójtowicz Bartosz,
  • Klita Łukasz,
  • Zych Łukasz,
  • Zybała Rafał

DOI
https://doi.org/10.1051/e3sconf/20161000130
Journal volume & issue
Vol. 10
p. 00130

Abstract

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The morphological characterization of a series of cobalt-cerium oxide composites prepared by the deposition of CeO2 onto Co3O4 powder with a molar ratio of cerium oxide to Co3O4 in the range of 0 to 1 was performed. The powders were also impregnated with a solution of K2CO3 to obtain the theoretical content of potassium atoms 2at·nm−2. To investigate the effect of adding specific amount of CeO2 on the catalytic activity, the X-ray diffraction, SEM-EDX, laser particle size distribution and BET surface area measurements were used. The catalysts were tested through the low-temperature decomposition of nitrous oxide in the temperature range of 50°C to 700°C. The addition of CeO2 and K always moved the temperature of a complete N2O conversion towards lower temperatures (480°C-540°C to 340°C-420°C). The best catalytic properties were shown by the samples in which the ratio of cerium oxide to cobalt oxide ranged from 0.4 to 0.7.