In order to examine the possibility of the rapid estimation of catalyst life by a periodic pulse technique, the deactivation of Ag catalyst in the oxidation of C2H4 was examined. In the periodic pulse technique, O2+N2 mixture and C2H 4+N2 mixture were fed alternately to subject a catalyst to forced redox cycle, which is expected to accelerate the sintering of catalyst under the reaction condition. As expected, the deactivation was faster in the periodic pulse technique than in the continuous flow technique. TEM al so indicated that the particle size of Ag increased faster in the periodic pulse run. Although the deactivation was the fastest in O2+N2 environment, the deactivation behavior was different from that under tlie reaction condition. It was shown that the deactivation should be accelerated under the reaction condition for the rapid estimation of catalyst life, and that the periodic pulse technique is useful for such purpose.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry