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

• Main Authors: Rajska Maria, Wójtowicz Bartosz, Klita Łukasz, Zych Łukasz, Zybała Rafał
• Format: Article
• Language: English
• Published: EDP Sciences 2016-01-01
• Series: E3S Web of Conferences
• Online Access: http://dx.doi.org/10.1051/e3sconf/20161000130

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.