Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/26107
Type: Artigo de periódico
Title: Ir-Ru/Al2O3 catalysts used in satellite propulsion
Author: Soares Neto, T.G.
Gobbo-Ferreira, J.
Cobo, A.J.G.
Cruz, G.M.
Abstract: Ir/Al2O3, Ir-Ru/Al2O3 and Ru/Al2O3, catalysts with total metal contents of 30% were prepared using the methods of incipient wetness and incipient coimpregnation wetness and were tested in a 2N microthruster. Their performances were then compared with that of the Shell 405 commercial catalyst (30% Ir/Al2O3). Tests were performed in continuous and pulsed regimes, where there are steep temperature and pressure gradients, from ambient values up to 650 ºC and 14 bar. Performance stability, thrust produced, temperature and stagnation pressure in the chamber and losses of mass were analyzed and compared to the corresponding parameters in Shell 405 tests. It was observed that the performance of all the above-mentioned catalysts was comparable to that of the commercial one, except for in loss of mass, where the values was higher, which was attributed to the lower mechanical resistance of the support.
Subject: iridium catalyst
ruthenium catalyst
iridium-ruthenium bimetallic catalyst
hydrazine decomposition
spacecraft propulsion
textural properties
TEM
chloride influence
Editor: Brazilian Society of Chemical Engineering
Rights: aberto
Identifier DOI: 10.1590/S0104-66322003000300007
Address: http://dx.doi.org/10.1590/S0104-66322003000300007
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322003000300007
Date Issue: 1-Sep-2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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