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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2015014682
pages 123-130

BULK CATALYST FOR NITROUS OXIDE DECOMPOSITION IN SPACE THRUSTERS

Sayuri Okamoto
Combustion and Propulsion Laboratory, National Space Research Institute, Cachoeira Paulista, SP, 12630-000, Brazil
Luis Gustavo Ferroni Pereira
Department of Engineering, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil
Leandro José Maschio
Combustion and Propulsion Laboratory, National Institute for Space Research, Cachoeira Paulista, SP, 12630-000, Brazil
Andre Navarro de Miranda
Material Engineering Department, University of Sao Paulo, Lorena, SP
Ricardo Vieira
Combustion and Propulsion Laboratory, National Institute for Space Research, Cachoeira Paulista, SP, 12630-000, Brazil

ABSTRAKT

Cobalt, manganese, and aluminum oxide−based bulk catalysts for decomposition of nitrous oxide (N2O) in space thrusters were prepared by the coprecipitation method. Nitrate solutions of cobalt, manganese, and aluminum were coprecipitated in a K2CO3 solution at 298 K, with pH adjusted to 10 by adding a KOH solution. The product was filtered, washed, dried, extruded, and calcined at 1173 K. The catalyst performances were evaluated in N2O decomposition using a 2 N thruster, and the experimental results were compared to theoretical values. In addition, the performances of the bulk catalysts was compared to those of the conventional catalyst (5% Rh2O3/Al2O3) for N2O decomposition.


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