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N2O reduction by activated carbon over iron bimetallic catalysts

✍ Scribed by Sónia A. Carabineiro; Francisco B. Fernandes; Rui J.C. Silva; Joaquim S. Vital; Ana M. Ramos; Isabel M. Fonseca

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
759 KB
Volume
133-135
Category
Article
ISSN
0920-5861

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✦ Synopsis

The kinetics of N 2 O conversion with activated carbon impregnated with binary mixtures of Fe with Co, Cu, Mg, Ni, Pb and V was studied in the temperature range of 300-650 8C using a microbalance. Synergetic effects were found for the Fe binary mixtures. External diffusion limitations to mass transfer seem to take place in the reaction with N 2 O above 600 8C. N 2 O conversion was also followed and reaction products were identified as N 2 and CO 2 in a stoichiometry of 2:1. In situ XRD was carried out to identify the phases present during reactions. The ability of the catalysts to chemisorb N 2 O dissociatively going through redox transference of oxygen to the carbon reactive sites seems to explain catalytic activity.

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