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Catalysts composed of iridium as the active phase dispersed in aluminum oxide (Ir/Al2O3) are used in propulsion systems that employ hydrazine as monopropellant in the control of satellite orbit and attitude. The aluminum oxide (Al2O3) utilized as support must present high values of specific surface area, pore volume, and crush strength. The niobium effect was evaluated in this work, in its oxide form...
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